diff options
Diffstat (limited to 'Documentation')
31 files changed, 483 insertions, 171 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss b/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss index 0a92a7c93a62..4f29e5f1ebfa 100644 --- a/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss +++ b/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss @@ -31,3 +31,31 @@ Date: March 2009 Kernel Version: 2.6.30 Contact: iss_storagedev@hp.com Description: A symbolic link to /sys/block/cciss!cXdY + +Where: /sys/bus/pci/devices/<dev>/ccissX/rescan +Date: August 2009 +Kernel Version: 2.6.31 +Contact: iss_storagedev@hp.com +Description: Kicks of a rescan of the controller to discover logical + drive topology changes. + +Where: /sys/bus/pci/devices/<dev>/ccissX/cXdY/lunid +Date: August 2009 +Kernel Version: 2.6.31 +Contact: iss_storagedev@hp.com +Description: Displays the 8-byte LUN ID used to address logical + drive Y of controller X. + +Where: /sys/bus/pci/devices/<dev>/ccissX/cXdY/raid_level +Date: August 2009 +Kernel Version: 2.6.31 +Contact: iss_storagedev@hp.com +Description: Displays the RAID level of logical drive Y of + controller X. + +Where: /sys/bus/pci/devices/<dev>/ccissX/cXdY/usage_count +Date: August 2009 +Kernel Version: 2.6.31 +Contact: iss_storagedev@hp.com +Description: Displays the usage count (number of opens) of logical drive Y + of controller X. diff --git a/Documentation/ABI/testing/sysfs-class-usb_host b/Documentation/ABI/testing/sysfs-class-uwb_rc-wusbhc index 46b66ad1f1b4..4e8106f7cfd9 100644 --- a/Documentation/ABI/testing/sysfs-class-usb_host +++ b/Documentation/ABI/testing/sysfs-class-uwb_rc-wusbhc @@ -1,4 +1,4 @@ -What: /sys/class/usb_host/usb_hostN/wusb_chid +What: /sys/class/uwb_rc/uwbN/wusbhc/wusb_chid Date: July 2008 KernelVersion: 2.6.27 Contact: David Vrabel <david.vrabel@csr.com> @@ -9,7 +9,7 @@ Description: Set an all zero CHID to stop the host controller. -What: /sys/class/usb_host/usb_hostN/wusb_trust_timeout +What: /sys/class/uwb_rc/uwbN/wusbhc/wusb_trust_timeout Date: July 2008 KernelVersion: 2.6.27 Contact: David Vrabel <david.vrabel@csr.com> diff --git a/Documentation/SubmittingPatches b/Documentation/SubmittingPatches index b7f9d3b4bbf6..72651f788f4e 100644 --- a/Documentation/SubmittingPatches +++ b/Documentation/SubmittingPatches @@ -232,7 +232,7 @@ your e-mail client so that it sends your patches untouched. When sending patches to Linus, always follow step #7. Large changes are not appropriate for mailing lists, and some -maintainers. If your patch, uncompressed, exceeds 40 kB in size, +maintainers. If your patch, uncompressed, exceeds 300 kB in size, it is preferred that you store your patch on an Internet-accessible server, and provide instead a URL (link) pointing to your patch. diff --git a/Documentation/arm/tcm.txt b/Documentation/arm/tcm.txt index 074f4be6667f..77fd9376e6d7 100644 --- a/Documentation/arm/tcm.txt +++ b/Documentation/arm/tcm.txt @@ -29,11 +29,13 @@ TCM location and size. Notice that this is not a MMU table: you actually move the physical location of the TCM around. At the place you put it, it will mask any underlying RAM from the CPU so it is usually wise not to overlap any physical RAM with -the TCM. The TCM memory exists totally outside the MMU and will -override any MMU mappings. +the TCM. -Code executing inside the ITCM does not "see" any MMU mappings -and e.g. register accesses must be made to physical addresses. +The TCM memory can then be remapped to another address again using +the MMU, but notice that the TCM if often used in situations where +the MMU is turned off. To avoid confusion the current Linux +implementation will map the TCM 1 to 1 from physical to virtual +memory in the location specified by the machine. TCM is used for a few things: diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt index 455d4e6d346d..0b33bfe7dde9 100644 --- a/Documentation/cgroups/cgroups.txt +++ b/Documentation/cgroups/cgroups.txt @@ -227,7 +227,14 @@ as the path relative to the root of the cgroup file system. Each cgroup is represented by a directory in the cgroup file system containing the following files describing that cgroup: - - tasks: list of tasks (by pid) attached to that cgroup + - tasks: list of tasks (by pid) attached to that cgroup. This list + is not guaranteed to be sorted. Writing a thread id into this file + moves the thread into this cgroup. + - cgroup.procs: list of tgids in the cgroup. This list is not + guaranteed to be sorted or free of duplicate tgids, and userspace + should sort/uniquify the list if this property is required. + Writing a tgid into this file moves all threads with that tgid into + this cgroup. - notify_on_release flag: run the release agent on exit? - release_agent: the path to use for release notifications (this file exists in the top cgroup only) @@ -374,7 +381,7 @@ Now you want to do something with this cgroup. In this directory you can find several files: # ls -notify_on_release tasks +cgroup.procs notify_on_release tasks (plus whatever files added by the attached subsystems) Now attach your shell to this cgroup: diff --git a/Documentation/connector/cn_test.c b/Documentation/connector/cn_test.c index 1711adc33373..b07add3467f1 100644 --- a/Documentation/connector/cn_test.c +++ b/Documentation/connector/cn_test.c @@ -34,7 +34,7 @@ static char cn_test_name[] = "cn_test"; static struct sock *nls; static struct timer_list cn_test_timer; -static void cn_test_callback(struct cn_msg *msg) +static void cn_test_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp) { pr_info("%s: %lu: idx=%x, val=%x, seq=%u, ack=%u, len=%d: %s.\n", __func__, jiffies, msg->id.idx, msg->id.val, diff --git a/Documentation/connector/connector.txt b/Documentation/connector/connector.txt index 81e6bf6ead57..78c9466a9aa8 100644 --- a/Documentation/connector/connector.txt +++ b/Documentation/connector/connector.txt @@ -23,7 +23,7 @@ handling, etc... The Connector driver allows any kernelspace agents to use netlink based networking for inter-process communication in a significantly easier way: -int cn_add_callback(struct cb_id *id, char *name, void (*callback) (void *)); +int cn_add_callback(struct cb_id *id, char *name, void (*callback) (struct cn_msg *, struct netlink_skb_parms *)); void cn_netlink_send(struct cn_msg *msg, u32 __group, int gfp_mask); struct cb_id @@ -53,15 +53,15 @@ struct cn_msg Connector interfaces. /*****************************************/ -int cn_add_callback(struct cb_id *id, char *name, void (*callback) (void *)); +int cn_add_callback(struct cb_id *id, char *name, void (*callback) (struct cn_msg *, struct netlink_skb_parms *)); Registers new callback with connector core. struct cb_id *id - unique connector's user identifier. It must be registered in connector.h for legal in-kernel users. char *name - connector's callback symbolic name. - void (*callback) (void *) - connector's callback. - Argument must be dereferenced to struct cn_msg *. + void (*callback) (struct cn..) - connector's callback. + cn_msg and the sender's credentials void cn_del_callback(struct cb_id *id); diff --git a/Documentation/debugging-via-ohci1394.txt b/Documentation/debugging-via-ohci1394.txt index 59a91e5c6909..611f5a5499b1 100644 --- a/Documentation/debugging-via-ohci1394.txt +++ b/Documentation/debugging-via-ohci1394.txt @@ -64,14 +64,14 @@ be used to view the printk buffer of a remote machine, even with live update. Bernhard Kaindl enhanced firescope to support accessing 64-bit machines from 32-bit firescope and vice versa: -- ftp://ftp.suse.de/private/bk/firewire/tools/firescope-0.2.2.tar.bz2 +- http://halobates.de/firewire/firescope-0.2.2.tar.bz2 and he implemented fast system dump (alpha version - read README.txt): -- ftp://ftp.suse.de/private/bk/firewire/tools/firedump-0.1.tar.bz2 +- http://halobates.de/firewire/firedump-0.1.tar.bz2 There is also a gdb proxy for firewire which allows to use gdb to access data which can be referenced from symbols found by gdb in vmlinux: -- ftp://ftp.suse.de/private/bk/firewire/tools/fireproxy-0.33.tar.bz2 +- http://halobates.de/firewire/fireproxy-0.33.tar.bz2 The latest version of this gdb proxy (fireproxy-0.34) can communicate (not yet stable) with kgdb over an memory-based communication module (kgdbom). @@ -178,7 +178,7 @@ Step-by-step instructions for using firescope with early OHCI initialization: Notes ----- -Documentation and specifications: ftp://ftp.suse.de/private/bk/firewire/docs +Documentation and specifications: http://halobates.de/firewire/ FireWire is a trademark of Apple Inc. - for more information please refer to: http://en.wikipedia.org/wiki/FireWire diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index 89a47b5aff07..04e6c819b28a 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt @@ -451,3 +451,33 @@ Why: OSS sound_core grabs all legacy minors (0-255) of SOUND_MAJOR will also allow making ALSA OSS emulation independent of sound_core. The dependency will be broken then too. Who: Tejun Heo <tj@kernel.org> + +---------------------------- + +What: Support for VMware's guest paravirtuliazation technique [VMI] will be + dropped. +When: 2.6.37 or earlier. +Why: With the recent innovations in CPU hardware acceleration technologies + from Intel and AMD, VMware ran a few experiments to compare these + techniques to guest paravirtualization technique on VMware's platform. + These hardware assisted virtualization techniques have outperformed the + performance benefits provided by VMI in most of the workloads. VMware + expects that these hardware features will be ubiquitous in a couple of + years, as a result, VMware has started a phased retirement of this + feature from the hypervisor. We will be removing this feature from the + Kernel too. Right now we are targeting 2.6.37 but can retire earlier if + technical reasons (read opportunity to remove major chunk of pvops) + arise. + + Please note that VMI has always been an optimization and non-VMI kernels + still work fine on VMware's platform. + Latest versions of VMware's product which support VMI are, + Workstation 7.0 and VSphere 4.0 on ESX side, future maintainence + releases for these products will continue supporting VMI. + + For more details about VMI retirement take a look at this, + http://blogs.vmware.com/guestosguide/2009/09/vmi-retirement.html + +Who: Alok N Kataria <akataria@vmware.com> + +---------------------------- diff --git a/Documentation/filesystems/ext3.txt b/Documentation/filesystems/ext3.txt index 570f9bd9be2b..05d5cf1d743f 100644 --- a/Documentation/filesystems/ext3.txt +++ b/Documentation/filesystems/ext3.txt @@ -123,10 +123,18 @@ resuid=n The user ID which may use the reserved blocks. sb=n Use alternate superblock at this location. -quota -noquota -grpquota -usrquota +quota These options are ignored by the filesystem. They +noquota are used only by quota tools to recognize volumes +grpquota where quota should be turned on. See documentation +usrquota in the quota-tools package for more details + (http://sourceforge.net/projects/linuxquota). + +jqfmt=<quota type> These options tell filesystem details about quota +usrjquota=<file> so that quota information can be properly updated +grpjquota=<file> during journal replay. They replace the above + quota options. See documentation in the quota-tools + package for more details + (http://sourceforge.net/projects/linuxquota). bh (*) ext3 associates buffer heads to data pages to nobh (a) cache disk block mapping information diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt index 18b5ec8cea45..bf4f4b7e11b3 100644 --- a/Documentation/filesystems/ext4.txt +++ b/Documentation/filesystems/ext4.txt @@ -282,9 +282,16 @@ stripe=n Number of filesystem blocks that mballoc will try to use for allocation size and alignment. For RAID5/6 systems this should be the number of data disks * RAID chunk size in file system blocks. -delalloc (*) Deferring block allocation until write-out time. -nodelalloc Disable delayed allocation. Blocks are allocation - when data is copied from user to page cache. + +delalloc (*) Defer block allocation until just before ext4 + writes out the block(s) in question. This + allows ext4 to better allocation decisions + more efficiently. +nodelalloc Disable delayed allocation. Blocks are allocated + when the data is copied from userspace to the + page cache, either via the write(2) system call + or when an mmap'ed page which was previously + unallocated is written for the first time. max_batch_time=usec Maximum amount of time ext4 should wait for additional filesystem operations to be batch diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index b5aee7838a00..2c48f945546b 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -1113,7 +1113,6 @@ Table 1-12: Files in /proc/fs/ext4/<devname> .............................................................................. File Content mb_groups details of multiblock allocator buddy cache of free blocks - mb_history multiblock allocation history .............................................................................. diff --git a/Documentation/filesystems/vfat.txt b/Documentation/filesystems/vfat.txt index b58b84b50fa2..eed520fd0c8e 100644 --- a/Documentation/filesystems/vfat.txt +++ b/Documentation/filesystems/vfat.txt @@ -102,7 +102,7 @@ shortname=lower|win95|winnt|mixed winnt: emulate the Windows NT rule for display/create. mixed: emulate the Windows NT rule for display, emulate the Windows 95 rule for create. - Default setting is `lower'. + Default setting is `mixed'. tz=UTC -- Interpret timestamps as UTC rather than local time. This option disables the conversion of timestamps diff --git a/Documentation/flexible-arrays.txt b/Documentation/flexible-arrays.txt index 84eb26808dee..cb8a3a00cc92 100644 --- a/Documentation/flexible-arrays.txt +++ b/Documentation/flexible-arrays.txt @@ -1,5 +1,5 @@ Using flexible arrays in the kernel -Last updated for 2.6.31 +Last updated for 2.6.32 Jonathan Corbet <corbet@lwn.net> Large contiguous memory allocations can be unreliable in the Linux kernel. @@ -40,6 +40,13 @@ argument is passed directly to the internal memory allocation calls. With the current code, using flags to ask for high memory is likely to lead to notably unpleasant side effects. +It is also possible to define flexible arrays at compile time with: + + DEFINE_FLEX_ARRAY(name, element_size, total); + +This macro will result in a definition of an array with the given name; the +element size and total will be checked for validity at compile time. + Storing data into a flexible array is accomplished with a call to: int flex_array_put(struct flex_array *array, unsigned int element_nr, @@ -76,16 +83,30 @@ particular element has never been allocated. Note that it is possible to get back a valid pointer for an element which has never been stored in the array. Memory for array elements is allocated one page at a time; a single allocation could provide memory for several -adjacent elements. The flexible array code does not know if a specific -element has been written; it only knows if the associated memory is -present. So a flex_array_get() call on an element which was never stored -in the array has the potential to return a pointer to random data. If the -caller does not have a separate way to know which elements were actually -stored, it might be wise, at least, to add GFP_ZERO to the flags argument -to ensure that all elements are zeroed. - -There is no way to remove a single element from the array. It is possible, -though, to remove all elements with a call to: +adjacent elements. Flexible array elements are normally initialized to the +value FLEX_ARRAY_FREE (defined as 0x6c in <linux/poison.h>), so errors +involving that number probably result from use of unstored array entries. +Note that, if array elements are allocated with __GFP_ZERO, they will be +initialized to zero and this poisoning will not happen. + +Individual elements in the array can be cleared with: + + int flex_array_clear(struct flex_array *array, unsigned int element_nr); + +This function will set the given element to FLEX_ARRAY_FREE and return +zero. If storage for the indicated element is not allocated for the array, +flex_array_clear() will return -EINVAL instead. Note that clearing an +element does not release the storage associated with it; to reduce the +allocated size of an array, call: + + int flex_array_shrink(struct flex_array *array); + +The return value will be the number of pages of memory actually freed. +This function works by scanning the array for pages containing nothing but +FLEX_ARRAY_FREE bytes, so (1) it can be expensive, and (2) it will not work +if the array's pages are allocated with __GFP_ZERO. + +It is possible to remove all elements of an array with a call to: void flex_array_free_parts(struct flex_array *array); diff --git a/Documentation/hwmon/ltc4215 b/Documentation/hwmon/ltc4215 index 2e6a21eb656c..c196a1846259 100644 --- a/Documentation/hwmon/ltc4215 +++ b/Documentation/hwmon/ltc4215 @@ -22,12 +22,13 @@ Usage Notes ----------- This driver does not probe for LTC4215 devices, due to the fact that some -of the possible addresses are unfriendly to probing. You will need to use -the "force" parameter to tell the driver where to find the device. +of the possible addresses are unfriendly to probing. You will have to +instantiate the devices explicitly. Example: the following will load the driver for an LTC4215 at address 0x44 on I2C bus #0: -$ modprobe ltc4215 force=0,0x44 +$ modprobe ltc4215 +$ echo ltc4215 0x44 > /sys/bus/i2c/devices/i2c-0/new_device Sysfs entries diff --git a/Documentation/hwmon/ltc4245 b/Documentation/hwmon/ltc4245 index bae7a3adc5d8..02838a47d862 100644 --- a/Documentation/hwmon/ltc4245 +++ b/Documentation/hwmon/ltc4245 @@ -23,12 +23,13 @@ Usage Notes ----------- This driver does not probe for LTC4245 devices, due to the fact that some -of the possible addresses are unfriendly to probing. You will need to use -the "force" parameter to tell the driver where to find the device. +of the possible addresses are unfriendly to probing. You will have to +instantiate the devices explicitly. Example: the following will load the driver for an LTC4245 at address 0x23 on I2C bus #1: -$ modprobe ltc4245 force=1,0x23 +$ modprobe ltc4245 +$ echo ltc4245 0x23 > /sys/bus/i2c/devices/i2c-1/new_device Sysfs entries diff --git a/Documentation/i2c/instantiating-devices b/Documentation/i2c/instantiating-devices index c740b7b41088..e89490270aba 100644 --- a/Documentation/i2c/instantiating-devices +++ b/Documentation/i2c/instantiating-devices @@ -188,7 +188,7 @@ segment, the address is sufficient to uniquely identify the device to be deleted. Example: -# echo eeprom 0x50 > /sys/class/i2c-adapter/i2c-3/new_device +# echo eeprom 0x50 > /sys/bus/i2c/devices/i2c-3/new_device While this interface should only be used when in-kernel device declaration can't be done, there is a variety of cases where it can be helpful: diff --git a/Documentation/infiniband/user_mad.txt b/Documentation/infiniband/user_mad.txt index 744687dd195b..8a366959f5cc 100644 --- a/Documentation/infiniband/user_mad.txt +++ b/Documentation/infiniband/user_mad.txt @@ -128,8 +128,8 @@ Setting IsSM Capability Bit To create the appropriate character device files automatically with udev, a rule like - KERNEL="umad*", NAME="infiniband/%k" - KERNEL="issm*", NAME="infiniband/%k" + KERNEL=="umad*", NAME="infiniband/%k" + KERNEL=="issm*", NAME="infiniband/%k" can be used. This will create device nodes named diff --git a/Documentation/infiniband/user_verbs.txt b/Documentation/infiniband/user_verbs.txt index f847501e50b5..afe3f8da9018 100644 --- a/Documentation/infiniband/user_verbs.txt +++ b/Documentation/infiniband/user_verbs.txt @@ -58,7 +58,7 @@ Memory pinning To create the appropriate character device files automatically with udev, a rule like - KERNEL="uverbs*", NAME="infiniband/%k" + KERNEL=="uverbs*", NAME="infiniband/%k" can be used. This will create device nodes named diff --git a/Documentation/isdn/INTERFACE.CAPI b/Documentation/isdn/INTERFACE.CAPI index 686e107923ec..5fe8de5cc727 100644 --- a/Documentation/isdn/INTERFACE.CAPI +++ b/Documentation/isdn/INTERFACE.CAPI @@ -60,10 +60,9 @@ open() operation on regular files or character devices. After a successful return from register_appl(), CAPI messages from the application may be passed to the driver for the device via calls to the -send_message() callback function. The CAPI message to send is stored in the -data portion of an skb. Conversely, the driver may call Kernel CAPI's -capi_ctr_handle_message() function to pass a received CAPI message to Kernel -CAPI for forwarding to an application, specifying its ApplID. +send_message() callback function. Conversely, the driver may call Kernel +CAPI's capi_ctr_handle_message() function to pass a received CAPI message to +Kernel CAPI for forwarding to an application, specifying its ApplID. Deregistration requests (CAPI operation CAPI_RELEASE) from applications are forwarded as calls to the release_appl() callback function, passing the same @@ -142,6 +141,7 @@ u16 (*send_message)(struct capi_ctr *ctrlr, struct sk_buff *skb) to accepting or queueing the message. Errors occurring during the actual processing of the message should be signaled with an appropriate reply message. + May be called in process or interrupt context. Calls to this function are not serialized by Kernel CAPI, ie. it must be prepared to be re-entered. @@ -154,7 +154,8 @@ read_proc_t *ctr_read_proc system entry, /proc/capi/controllers/<n>; will be called with a pointer to the device's capi_ctr structure as the last (data) argument -Note: Callback functions are never called in interrupt context. +Note: Callback functions except send_message() are never called in interrupt +context. - to be filled in before calling capi_ctr_ready(): @@ -171,14 +172,40 @@ u8 serial[CAPI_SERIAL_LEN] value to return for CAPI_GET_SERIAL -4.3 The _cmsg Structure +4.3 SKBs + +CAPI messages are passed between Kernel CAPI and the driver via send_message() +and capi_ctr_handle_message(), stored in the data portion of a socket buffer +(skb). Each skb contains a single CAPI message coded according to the CAPI 2.0 +standard. + +For the data transfer messages, DATA_B3_REQ and DATA_B3_IND, the actual +payload data immediately follows the CAPI message itself within the same skb. +The Data and Data64 parameters are not used for processing. The Data64 +parameter may be omitted by setting the length field of the CAPI message to 22 +instead of 30. + + +4.4 The _cmsg Structure (declared in <linux/isdn/capiutil.h>) The _cmsg structure stores the contents of a CAPI 2.0 message in an easily -accessible form. It contains members for all possible CAPI 2.0 parameters, of -which only those appearing in the message type currently being processed are -actually used. Unused members should be set to zero. +accessible form. It contains members for all possible CAPI 2.0 parameters, +including subparameters of the Additional Info and B Protocol structured +parameters, with the following exceptions: + +* second Calling party number (CONNECT_IND) + +* Data64 (DATA_B3_REQ and DATA_B3_IND) + +* Sending complete (subparameter of Additional Info, CONNECT_REQ and INFO_REQ) + +* Global Configuration (subparameter of B Protocol, CONNECT_REQ, CONNECT_RESP + and SELECT_B_PROTOCOL_REQ) + +Only those parameters appearing in the message type currently being processed +are actually used. Unused members should be set to zero. Members are named after the CAPI 2.0 standard names of the parameters they represent. See <linux/isdn/capiutil.h> for the exact spelling. Member data @@ -190,18 +217,19 @@ u16 for CAPI parameters of type 'word' u32 for CAPI parameters of type 'dword' -_cstruct for CAPI parameters of type 'struct' not containing any - variably-sized (struct) subparameters (eg. 'Called Party Number') +_cstruct for CAPI parameters of type 'struct' The member is a pointer to a buffer containing the parameter in CAPI encoding (length + content). It may also be NULL, which will be taken to represent an empty (zero length) parameter. + Subparameters are stored in encoded form within the content part. -_cmstruct for CAPI parameters of type 'struct' containing 'struct' - subparameters ('Additional Info' and 'B Protocol') +_cmstruct alternative representation for CAPI parameters of type 'struct' + (used only for the 'Additional Info' and 'B Protocol' parameters) The representation is a single byte containing one of the values: - CAPI_DEFAULT: the parameter is empty - CAPI_COMPOSE: the values of the subparameters are stored - individually in the corresponding _cmsg structure members + CAPI_DEFAULT: The parameter is empty/absent. + CAPI_COMPOSE: The parameter is present. + Subparameter values are stored individually in the corresponding + _cmsg structure members. Functions capi_cmsg2message() and capi_message2cmsg() are provided to convert messages between their transport encoding described in the CAPI 2.0 standard @@ -297,3 +325,26 @@ char *capi_cmd2str(u8 Command, u8 Subcommand) be NULL if the command/subcommand is not one of those defined in the CAPI 2.0 standard. + +7. Debugging + +The module kernelcapi has a module parameter showcapimsgs controlling some +debugging output produced by the module. It can only be set when the module is +loaded, via a parameter "showcapimsgs=<n>" to the modprobe command, either on +the command line or in the configuration file. + +If the lowest bit of showcapimsgs is set, kernelcapi logs controller and +application up and down events. + +In addition, every registered CAPI controller has an associated traceflag +parameter controlling how CAPI messages sent from and to tha controller are +logged. The traceflag parameter is initialized with the value of the +showcapimsgs parameter when the controller is registered, but can later be +changed via the MANUFACTURER_REQ command KCAPI_CMD_TRACE. + +If the value of traceflag is non-zero, CAPI messages are logged. +DATA_B3 messages are only logged if the value of traceflag is > 2. + +If the lowest bit of traceflag is set, only the command/subcommand and message +length are logged. Otherwise, kernelcapi logs a readable representation of +the entire message. diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 6fa7292947e5..9107b387e91f 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -671,6 +671,7 @@ and is between 256 and 4096 characters. It is defined in the file earlyprintk= [X86,SH,BLACKFIN] earlyprintk=vga earlyprintk=serial[,ttySn[,baudrate]] + earlyprintk=ttySn[,baudrate] earlyprintk=dbgp[debugController#] Append ",keep" to not disable it when the real console diff --git a/Documentation/i2c/chips/eeprom b/Documentation/misc-devices/eeprom index f7e8104b5764..f7e8104b5764 100644 --- a/Documentation/i2c/chips/eeprom +++ b/Documentation/misc-devices/eeprom diff --git a/Documentation/i2c/chips/max6875 b/Documentation/misc-devices/max6875 index 10ca43cd1a72..1e89ee3ccc1b 100644 --- a/Documentation/i2c/chips/max6875 +++ b/Documentation/misc-devices/max6875 @@ -42,10 +42,12 @@ General Remarks Valid addresses for the MAX6875 are 0x50 and 0x52. Valid addresses for the MAX6874 are 0x50, 0x52, 0x54 and 0x56. -The driver does not probe any address, so you must force the address. +The driver does not probe any address, so you explicitly instantiate the +devices. Example: -$ modprobe max6875 force=0,0x50 +$ modprobe max6875 +$ echo max6875 0x50 > /sys/bus/i2c/devices/i2c-0/new_device The MAX6874/MAX6875 ignores address bit 0, so this driver attaches to multiple addresses. For example, for address 0x50, it also reserves 0x51. diff --git a/Documentation/networking/pktgen.txt b/Documentation/networking/pktgen.txt index c6cf4a3c16e0..61bb645d50e0 100644 --- a/Documentation/networking/pktgen.txt +++ b/Documentation/networking/pktgen.txt @@ -90,6 +90,11 @@ Examples: pgset "dstmac 00:00:00:00:00:00" sets MAC destination address pgset "srcmac 00:00:00:00:00:00" sets MAC source address + pgset "queue_map_min 0" Sets the min value of tx queue interval + pgset "queue_map_max 7" Sets the max value of tx queue interval, for multiqueue devices + To select queue 1 of a given device, + use queue_map_min=1 and queue_map_max=1 + pgset "src_mac_count 1" Sets the number of MACs we'll range through. The 'minimum' MAC is what you set with srcmac. @@ -101,6 +106,9 @@ Examples: IPDST_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND MPLS_RND, VID_RND, SVID_RND + QUEUE_MAP_RND # queue map random + QUEUE_MAP_CPU # queue map mirrors smp_processor_id() + pgset "udp_src_min 9" set UDP source port min, If < udp_src_max, then cycle through the port range. diff --git a/Documentation/networking/timestamping/timestamping.c b/Documentation/networking/timestamping/timestamping.c index 43d143104210..a7936fe8444a 100644 --- a/Documentation/networking/timestamping/timestamping.c +++ b/Documentation/networking/timestamping/timestamping.c @@ -381,7 +381,7 @@ int main(int argc, char **argv) memset(&hwtstamp, 0, sizeof(hwtstamp)); strncpy(hwtstamp.ifr_name, interface, sizeof(hwtstamp.ifr_name)); hwtstamp.ifr_data = (void *)&hwconfig; - memset(&hwconfig, 0, sizeof(&hwconfig)); + memset(&hwconfig, 0, sizeof(hwconfig)); hwconfig.tx_type = (so_timestamping_flags & SOF_TIMESTAMPING_TX_HARDWARE) ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF; diff --git a/Documentation/scsi/hptiop.txt b/Documentation/scsi/hptiop.txt index a6eb4add1be6..9605179711f4 100644 --- a/Documentation/scsi/hptiop.txt +++ b/Documentation/scsi/hptiop.txt @@ -3,6 +3,25 @@ HIGHPOINT ROCKETRAID 3xxx/4xxx ADAPTER DRIVER (hptiop) Controller Register Map ------------------------- +For RR44xx Intel IOP based adapters, the controller IOP is accessed via PCI BAR0 and BAR2: + + BAR0 offset Register + 0x11C5C Link Interface IRQ Set + 0x11C60 Link Interface IRQ Clear + + BAR2 offset Register + 0x10 Inbound Message Register 0 + 0x14 Inbound Message Register 1 + 0x18 Outbound Message Register 0 + 0x1C Outbound Message Register 1 + 0x20 Inbound Doorbell Register + 0x24 Inbound Interrupt Status Register + 0x28 Inbound Interrupt Mask Register + 0x30 Outbound Interrupt Status Register + 0x34 Outbound Interrupt Mask Register + 0x40 Inbound Queue Port + 0x44 Outbound Queue Port + For Intel IOP based adapters, the controller IOP is accessed via PCI BAR0: BAR0 offset Register @@ -93,7 +112,7 @@ The driver exposes following sysfs attributes: ----------------------------------------------------------------------------- -Copyright (C) 2006-2007 HighPoint Technologies, Inc. All Rights Reserved. +Copyright (C) 2006-2009 HighPoint Technologies, Inc. All Rights Reserved. This file is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of diff --git a/Documentation/sound/alsa/HD-Audio-Models.txt b/Documentation/sound/alsa/HD-Audio-Models.txt index f1708b79f963..4c7f9aee5c4e 100644 --- a/Documentation/sound/alsa/HD-Audio-Models.txt +++ b/Documentation/sound/alsa/HD-Audio-Models.txt @@ -209,6 +209,7 @@ AD1884A / AD1883 / AD1984A / AD1984B laptop laptop with HP jack sensing mobile mobile devices with HP jack sensing thinkpad Lenovo Thinkpad X300 + touchsmart HP Touchsmart AD1884 ====== @@ -358,6 +359,7 @@ STAC9227/9228/9229/927x 5stack-no-fp D965 5stack without front panel dell-3stack Dell Dimension E520 dell-bios Fixes with Dell BIOS setup + volknob Fixes with volume-knob widget 0x24 auto BIOS setup (default) STAC92HD71B* diff --git a/Documentation/vm/ksm.txt b/Documentation/vm/ksm.txt index 72a22f65960e..262d8e6793a3 100644 --- a/Documentation/vm/ksm.txt +++ b/Documentation/vm/ksm.txt @@ -52,15 +52,15 @@ The KSM daemon is controlled by sysfs files in /sys/kernel/mm/ksm/, readable by all but writable only by root: max_kernel_pages - set to maximum number of kernel pages that KSM may use - e.g. "echo 2000 > /sys/kernel/mm/ksm/max_kernel_pages" + e.g. "echo 100000 > /sys/kernel/mm/ksm/max_kernel_pages" Value 0 imposes no limit on the kernel pages KSM may use; but note that any process using MADV_MERGEABLE can cause KSM to allocate these pages, unswappable until it exits. - Default: 2000 (chosen for demonstration purposes) + Default: quarter of memory (chosen to not pin too much) pages_to_scan - how many present pages to scan before ksmd goes to sleep - e.g. "echo 200 > /sys/kernel/mm/ksm/pages_to_scan" - Default: 200 (chosen for demonstration purposes) + e.g. "echo 100 > /sys/kernel/mm/ksm/pages_to_scan" + Default: 100 (chosen for demonstration purposes) sleep_millisecs - how many milliseconds ksmd should sleep before next scan e.g. "echo 20 > /sys/kernel/mm/ksm/sleep_millisecs" @@ -70,7 +70,8 @@ run - set 0 to stop ksmd from running but keep merged pages, set 1 to run ksmd e.g. "echo 1 > /sys/kernel/mm/ksm/run", set 2 to stop ksmd and unmerge all pages currently merged, but leave mergeable areas registered for next run - Default: 1 (for immediate use by apps which register) + Default: 0 (must be changed to 1 to activate KSM, + except if CONFIG_SYSFS is disabled) The effectiveness of KSM and MADV_MERGEABLE is shown in /sys/kernel/mm/ksm/: @@ -86,4 +87,4 @@ pages_volatile embraces several different kinds of activity, but a high proportion there would also indicate poor use of madvise MADV_MERGEABLE. Izik Eidus, -Hugh Dickins, 30 July 2009 +Hugh Dickins, 24 Sept 2009 diff --git a/Documentation/vm/page-types.c b/Documentation/vm/page-types.c index fa1a30d9e9d5..3ec4f2a22585 100644 --- a/Documentation/vm/page-types.c +++ b/Documentation/vm/page-types.c @@ -2,7 +2,10 @@ * page-types: Tool for querying page flags * * Copyright (C) 2009 Intel corporation - * Copyright (C) 2009 Wu Fengguang <fengguang.wu@intel.com> + * + * Authors: Wu Fengguang <fengguang.wu@intel.com> + * + * Released under the General Public License (GPL). */ #define _LARGEFILE64_SOURCE @@ -69,7 +72,9 @@ #define KPF_COMPOUND_TAIL 16 #define KPF_HUGE 17 #define KPF_UNEVICTABLE 18 +#define KPF_HWPOISON 19 #define KPF_NOPAGE 20 +#define KPF_KSM 21 /* [32-] kernel hacking assistances */ #define KPF_RESERVED 32 @@ -116,7 +121,9 @@ static char *page_flag_names[] = { [KPF_COMPOUND_TAIL] = "T:compound_tail", [KPF_HUGE] = "G:huge", [KPF_UNEVICTABLE] = "u:unevictable", + [KPF_HWPOISON] = "X:hwpoison", [KPF_NOPAGE] = "n:nopage", + [KPF_KSM] = "x:ksm", [KPF_RESERVED] = "r:reserved", [KPF_MLOCKED] = "m:mlocked", @@ -152,9 +159,6 @@ static unsigned long opt_size[MAX_ADDR_RANGES]; static int nr_vmas; static unsigned long pg_start[MAX_VMAS]; static unsigned long pg_end[MAX_VMAS]; -static unsigned long voffset; - -static int pagemap_fd; #define MAX_BIT_FILTERS 64 static int nr_bit_filters; @@ -163,9 +167,16 @@ static uint64_t opt_bits[MAX_BIT_FILTERS]; static int page_size; -#define PAGES_BATCH (64 << 10) /* 64k pages */ +static int pagemap_fd; static int kpageflags_fd; +static int opt_hwpoison; +static int opt_unpoison; + +static char *hwpoison_debug_fs = "/debug/hwpoison"; +static int hwpoison_inject_fd; +static int hwpoison_forget_fd; + #define HASH_SHIFT 13 #define HASH_SIZE (1 << HASH_SHIFT) #define HASH_MASK (HASH_SIZE - 1) @@ -207,6 +218,74 @@ static void fatal(const char *x, ...) exit(EXIT_FAILURE); } +int checked_open(const char *pathname, int flags) +{ + int fd = open(pathname, flags); + + if (fd < 0) { + perror(pathname); + exit(EXIT_FAILURE); + } + + return fd; +} + +/* + * pagemap/kpageflags routines + */ + +static unsigned long do_u64_read(int fd, char *name, + uint64_t *buf, + unsigned long index, + unsigned long count) +{ + long bytes; + + if (index > ULONG_MAX / 8) + fatal("index overflow: %lu\n", index); + + if (lseek(fd, index * 8, SEEK_SET) < 0) { + perror(name); + exit(EXIT_FAILURE); + } + + bytes = read(fd, buf, count * 8); + if (bytes < 0) { + perror(name); + exit(EXIT_FAILURE); + } + if (bytes % 8) + fatal("partial read: %lu bytes\n", bytes); + + return bytes / 8; +} + +static unsigned long kpageflags_read(uint64_t *buf, + unsigned long index, + unsigned long pages) +{ + return do_u64_read(kpageflags_fd, PROC_KPAGEFLAGS, buf, index, pages); +} + +static unsigned long pagemap_read(uint64_t *buf, + unsigned long index, + unsigned long pages) +{ + return do_u64_read(pagemap_fd, "/proc/pid/pagemap", buf, index, pages); +} + +static unsigned long pagemap_pfn(uint64_t val) +{ + unsigned long pfn; + + if (val & PM_PRESENT) + pfn = PM_PFRAME(val); + else + pfn = 0; + + return pfn; +} + /* * page flag names @@ -255,7 +334,8 @@ static char *page_flag_longname(uint64_t flags) * page list and summary */ -static void show_page_range(unsigned long offset, uint64_t flags) +static void show_page_range(unsigned long voffset, + unsigned long offset, uint64_t flags) { static uint64_t flags0; static unsigned long voff; @@ -281,7 +361,8 @@ static void show_page_range(unsigned long offset, uint64_t flags) count = 1; } -static void show_page(unsigned long offset, uint64_t flags) +static void show_page(unsigned long voffset, + unsigned long offset, uint64_t flags) { if (opt_pid) printf("%lx\t", voffset); @@ -362,6 +443,62 @@ static uint64_t well_known_flags(uint64_t flags) return flags; } +static uint64_t kpageflags_flags(uint64_t flags) +{ + flags = expand_overloaded_flags(flags); + + if (!opt_raw) + flags = well_known_flags(flags); + + return flags; +} + +/* + * page actions + */ + +static void prepare_hwpoison_fd(void) +{ + char buf[100]; + + if (opt_hwpoison && !hwpoison_inject_fd) { + sprintf(buf, "%s/corrupt-pfn", hwpoison_debug_fs); + hwpoison_inject_fd = checked_open(buf, O_WRONLY); + } + + if (opt_unpoison && !hwpoison_forget_fd) { + sprintf(buf, "%s/renew-pfn", hwpoison_debug_fs); + hwpoison_forget_fd = checked_open(buf, O_WRONLY); + } +} + +static int hwpoison_page(unsigned long offset) +{ + char buf[100]; + int len; + + len = sprintf(buf, "0x%lx\n", offset); + len = write(hwpoison_inject_fd, buf, len); + if (len < 0) { + perror("hwpoison inject"); + return len; + } + return 0; +} + +static int unpoison_page(unsigned long offset) +{ + char buf[100]; + int len; + + len = sprintf(buf, "0x%lx\n", offset); + len = write(hwpoison_forget_fd, buf, len); + if (len < 0) { + perror("hwpoison forget"); + return len; + } + return 0; +} /* * page frame walker @@ -394,104 +531,83 @@ static int hash_slot(uint64_t flags) exit(EXIT_FAILURE); } -static void add_page(unsigned long offset, uint64_t flags) +static void add_page(unsigned long voffset, + unsigned long offset, uint64_t flags) { - flags = expand_overloaded_flags(flags); - - if (!opt_raw) - flags = well_known_flags(flags); + flags = kpageflags_flags(flags); if (!bit_mask_ok(flags)) return; + if (opt_hwpoison) + hwpoison_page(offset); + if (opt_unpoison) + unpoison_page(offset); + if (opt_list == 1) - show_page_range(offset, flags); + show_page_range(voffset, offset, flags); else if (opt_list == 2) - show_page(offset, flags); + show_page(voffset, offset, flags); nr_pages[hash_slot(flags)]++; total_pages++; } -static void walk_pfn(unsigned long index, unsigned long count) +#define KPAGEFLAGS_BATCH (64 << 10) /* 64k pages */ +static void walk_pfn(unsigned long voffset, + unsigned long index, + unsigned long count) { + uint64_t buf[KPAGEFLAGS_BATCH]; unsigned long batch; - unsigned long n; + unsigned long pages; unsigned long i; - if (index > ULONG_MAX / KPF_BYTES) - fatal("index overflow: %lu\n", index); - - lseek(kpageflags_fd, index * KPF_BYTES, SEEK_SET); - while (count) { - uint64_t kpageflags_buf[KPF_BYTES * PAGES_BATCH]; - - batch = min_t(unsigned long, count, PAGES_BATCH); - n = read(kpageflags_fd, kpageflags_buf, batch * KPF_BYTES); - if (n == 0) + batch = min_t(unsigned long, count, KPAGEFLAGS_BATCH); + pages = kpageflags_read(buf, index, batch); + if (pages == 0) break; - if (n < 0) { - perror(PROC_KPAGEFLAGS); - exit(EXIT_FAILURE); - } - if (n % KPF_BYTES != 0) - fatal("partial read: %lu bytes\n", n); - n = n / KPF_BYTES; + for (i = 0; i < pages; i++) + add_page(voffset + i, index + i, buf[i]); - for (i = 0; i < n; i++) - add_page(index + i, kpageflags_buf[i]); - - index += batch; - count -= batch; + index += pages; + count -= pages; } } - -#define PAGEMAP_BATCH 4096 -static unsigned long task_pfn(unsigned long pgoff) +#define PAGEMAP_BATCH (64 << 10) +static void walk_vma(unsigned long index, unsigned long count) { - static uint64_t buf[PAGEMAP_BATCH]; - static unsigned long start; - static long count; - uint64_t pfn; + uint64_t buf[PAGEMAP_BATCH]; + unsigned long batch; + unsigned long pages; + unsigned long pfn; + unsigned long i; - if (pgoff < start || pgoff >= start + count) { - if (lseek64(pagemap_fd, - (uint64_t)pgoff * PM_ENTRY_BYTES, - SEEK_SET) < 0) { - perror("pagemap seek"); - exit(EXIT_FAILURE); - } - count = read(pagemap_fd, buf, sizeof(buf)); - if (count == 0) - return 0; - if (count < 0) { - perror("pagemap read"); - exit(EXIT_FAILURE); - } - if (count % PM_ENTRY_BYTES) { - fatal("pagemap read not aligned.\n"); - exit(EXIT_FAILURE); - } - count /= PM_ENTRY_BYTES; - start = pgoff; - } + while (count) { + batch = min_t(unsigned long, count, PAGEMAP_BATCH); + pages = pagemap_read(buf, index, batch); + if (pages == 0) + break; - pfn = buf[pgoff - start]; - if (pfn & PM_PRESENT) - pfn = PM_PFRAME(pfn); - else - pfn = 0; + for (i = 0; i < pages; i++) { + pfn = pagemap_pfn(buf[i]); + if (pfn) + walk_pfn(index + i, pfn, 1); + } - return pfn; + index += pages; + count -= pages; + } } static void walk_task(unsigned long index, unsigned long count) { - int i = 0; const unsigned long end = index + count; + unsigned long start; + int i = 0; while (index < end) { @@ -501,15 +617,11 @@ static void walk_task(unsigned long index, unsigned long count) if (pg_start[i] >= end) return; - voffset = max_t(unsigned long, pg_start[i], index); - index = min_t(unsigned long, pg_end[i], end); + start = max_t(unsigned long, pg_start[i], index); + index = min_t(unsigned long, pg_end[i], end); - assert(voffset < index); - for (; voffset < index; voffset++) { - unsigned long pfn = task_pfn(voffset); - if (pfn) - walk_pfn(pfn, 1); - } + assert(start < index); + walk_vma(start, index - start); } } @@ -527,18 +639,14 @@ static void walk_addr_ranges(void) { int i; - kpageflags_fd = open(PROC_KPAGEFLAGS, O_RDONLY); - if (kpageflags_fd < 0) { - perror(PROC_KPAGEFLAGS); - exit(EXIT_FAILURE); - } + kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY); if (!nr_addr_ranges) add_addr_range(0, ULONG_MAX); for (i = 0; i < nr_addr_ranges; i++) if (!opt_pid) - walk_pfn(opt_offset[i], opt_size[i]); + walk_pfn(0, opt_offset[i], opt_size[i]); else walk_task(opt_offset[i], opt_size[i]); @@ -575,6 +683,8 @@ static void usage(void) " -l|--list Show page details in ranges\n" " -L|--list-each Show page details one by one\n" " -N|--no-summary Don't show summay info\n" +" -X|--hwpoison hwpoison pages\n" +" -x|--unpoison unpoison pages\n" " -h|--help Show this usage message\n" "addr-spec:\n" " N one page at offset N (unit: pages)\n" @@ -624,11 +734,7 @@ static void parse_pid(const char *str) opt_pid = parse_number(str); sprintf(buf, "/proc/%d/pagemap", opt_pid); - pagemap_fd = open(buf, O_RDONLY); - if (pagemap_fd < 0) { - perror(buf); - exit(EXIT_FAILURE); - } + pagemap_fd = checked_open(buf, O_RDONLY); sprintf(buf, "/proc/%d/maps", opt_pid); file = fopen(buf, "r"); @@ -788,6 +894,8 @@ static struct option opts[] = { { "list" , 0, NULL, 'l' }, { "list-each" , 0, NULL, 'L' }, { "no-summary", 0, NULL, 'N' }, + { "hwpoison" , 0, NULL, 'X' }, + { "unpoison" , 0, NULL, 'x' }, { "help" , 0, NULL, 'h' }, { NULL , 0, NULL, 0 } }; @@ -799,7 +907,7 @@ int main(int argc, char *argv[]) page_size = getpagesize(); while ((c = getopt_long(argc, argv, - "rp:f:a:b:lLNh", opts, NULL)) != -1) { + "rp:f:a:b:lLNXxh", opts, NULL)) != -1) { switch (c) { case 'r': opt_raw = 1; @@ -825,6 +933,14 @@ int main(int argc, char *argv[]) case 'N': opt_no_summary = 1; break; + case 'X': + opt_hwpoison = 1; + prepare_hwpoison_fd(); + break; + case 'x': + opt_unpoison = 1; + prepare_hwpoison_fd(); + break; case 'h': usage(); exit(0); @@ -844,7 +960,7 @@ int main(int argc, char *argv[]) walk_addr_ranges(); if (opt_list == 1) - show_page_range(0, 0); /* drain the buffer */ + show_page_range(0, 0, 0); /* drain the buffer */ if (opt_no_summary) return 0; diff --git a/Documentation/vm/pagemap.txt b/Documentation/vm/pagemap.txt index 600a304a828c..df09b9650a81 100644 --- a/Documentation/vm/pagemap.txt +++ b/Documentation/vm/pagemap.txt @@ -57,7 +57,9 @@ There are three components to pagemap: 16. COMPOUND_TAIL 16. HUGE 18. UNEVICTABLE + 19. HWPOISON 20. NOPAGE + 21. KSM Short descriptions to the page flags: @@ -86,9 +88,15 @@ Short descriptions to the page flags: 17. HUGE this is an integral part of a HugeTLB page +19. HWPOISON + hardware detected memory corruption on this page: don't touch the data! + 20. NOPAGE no page frame exists at the requested address +21. KSM + identical memory pages dynamically shared between one or more processes + [IO related page flags] 1. ERROR IO error occurred 3. UPTODATE page has up-to-date data diff --git a/Documentation/w1/masters/ds2482 b/Documentation/w1/masters/ds2482 index 9210d6fa5024..299b91c7609f 100644 --- a/Documentation/w1/masters/ds2482 +++ b/Documentation/w1/masters/ds2482 @@ -24,8 +24,8 @@ General Remarks Valid addresses are 0x18, 0x19, 0x1a, and 0x1b. However, the device cannot be detected without writing to the i2c bus, so no -detection is done. -You should force the device address. +detection is done. You should instantiate the device explicitly. -$ modprobe ds2482 force=0,0x18 +$ modprobe ds2482 +$ echo ds2482 0x18 > /sys/bus/i2c/devices/i2c-0/new_device |