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* oom: print triggering task's cpuset and mems allowedDavid Rientjes2009-01-071-0/+34
| | | | | | | | | | | | | | When cpusets are enabled, it's necessary to print the triggering task's set of allowable nodes so the subsequently printed meminfo can be interpreted correctly. We also print the task's cpuset name for informational purposes. [rientjes@google.com: task lock current before dereferencing cpuset] Cc: Paul Menage <menage@google.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linusLinus Torvalds2009-01-063-26/+94
|\ | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: module: convert to stop_machine_create/destroy. stop_machine: introduce stop_machine_create/destroy. parisc: fix module loading failure of large kernel modules module: fix module loading failure of large kernel modules for parisc module: fix warning of unused function when !CONFIG_PROC_FS kernel/module.c: compare symbol values when marking symbols as exported in /proc/kallsyms. remove CONFIG_KMOD
| * module: convert to stop_machine_create/destroy.Heiko Carstens2009-01-041-2/+21
| | | | | | | | | | | | | | | | The module code relies on a non-failing stop_machine call. So we create the kstop threads in advance and with that make sure the call won't fail. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * stop_machine: introduce stop_machine_create/destroy.Heiko Carstens2009-01-042-11/+50
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce stop_machine_create/destroy. With this interface subsystems that need a non-failing stop_machine environment can create the stop_machine machine threads before actually calling stop_machine. When the threads aren't needed anymore they can be killed with stop_machine_destroy again. When stop_machine gets called and the threads aren't present they will be created and destroyed automatically. This restores the old behaviour of stop_machine. This patch also converts cpu hotplug to the new interface since it is special: cpu_down calls __stop_machine instead of stop_machine. However the kstop threads will only be created when stop_machine gets called. Changing the code so that the threads would be created automatically on __stop_machine is currently not possible: when __stop_machine gets called we hold cpu_add_remove_lock, which is the same lock that create_rt_workqueue would take. So the workqueue needs to be created before the cpu hotplug code locks cpu_add_remove_lock. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * module: fix module loading failure of large kernel modules for pariscHelge Deller2009-01-041-3/+13
| | | | | | | | | | | | | | | | | | | | | | When creating the final layout of a kernel module in memory, allow the module loader to reserve some additional memory in front of a given section. This is currently only needed for the parisc port which needs to put the stub entries there to fulfill the 17/22bit PCREL relocations with large kernel modules like xfs. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (renamed fn)
| * module: fix warning of unused function when !CONFIG_PROC_FSJianjun Kong2009-01-041-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | Fix this warning: kernel/module.c:824: warning: ‘print_unload_info’ defined but not used print_unload_info() just was used when CONFIG_PROC_FS was defined. This patch mark print_unload_info() inline to solve the problem. Signed-off-by: Jianjun Kong <jianjun@zeuux.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> CC: Ingo Molnar <mingo@elte.hu> CC: Américo Wang <xiyou.wangcong@gmail.com>
| * kernel/module.c: compare symbol values when marking symbols as exported in ↵Tim Abbott2009-01-041-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | /proc/kallsyms. When there are two symbols in a module with the same name, one of which is exported, both will be marked as exported in /proc/kallsyms. There aren't any instances of this in the current kernel, but it is easy to construct a simple module with two compilation units that exhibits the problem. $ objdump -j .text -t testmod.ko | grep foo 00000000 l F .text 00000032 foo 00000080 g F .text 00000001 foo $ sudo insmod testmod.ko $ grep "T foo" /proc/kallsyms c28e8000 T foo [testmod] c28e8080 T foo [testmod] Fix this by comparing the symbol values once we've found the exported symbol table entry matching the symbol name. Tested using Ksplice: $ ksplice-create --patch=this_commit.patch --id=bar . $ sudo ksplice-apply ksplice-bar.tar.gz Done! $ grep "T foo" /proc/kallsyms c28e8080 T foo [testmod] Signed-off-by: Tim Abbott <tabbott@mit.edu> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* | Merge branch 'for-linus' of ↵Linus Torvalds2009-01-061-1/+0
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: inotify: fix type errors in interfaces fix breakage in reiserfs_new_inode() fix the treatment of jfs special inodes vfs: remove duplicate code in get_fs_type() add a vfs_fsync helper sys_execve and sys_uselib do not call into fsnotify zero i_uid/i_gid on inode allocation inode->i_op is never NULL ntfs: don't NULL i_op isofs check for NULL ->i_op in root directory is dead code affs: do not zero ->i_op kill suid bit only for regular files vfs: lseek(fd, 0, SEEK_CUR) race condition
| * | zero i_uid/i_gid on inode allocationAl Viro2009-01-051-1/+0
| |/ | | | | | | | | | | | | | | | | ... and don't bother in callers. Don't bother with zeroing i_blocks, while we are at it - it's already been zeroed. i_mode is not worth the effort; it has no common default value. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge branch 'audit.b61' of ↵Linus Torvalds2009-01-055-619/+457
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current * 'audit.b61' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current: audit: validate comparison operations, store them in sane form clean up audit_rule_{add,del} a bit make sure that filterkey of task,always rules is reported audit rules ordering, part 2 fixing audit rule ordering mess, part 1 audit_update_lsm_rules() misses the audit_inode_hash[] ones sanitize audit_log_capset() sanitize audit_fd_pair() sanitize audit_mq_open() sanitize AUDIT_MQ_SENDRECV sanitize audit_mq_notify() sanitize audit_mq_getsetattr() sanitize audit_ipc_set_perm() sanitize audit_ipc_obj() sanitize audit_socketcall don't reallocate buffer in every audit_sockaddr()
| * | audit: validate comparison operations, store them in sane formAl Viro2009-01-042-68/+66
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't store the field->op in the messy (and very inconvenient for e.g. audit_comparator()) form; translate to dense set of values and do full validation of userland-submitted value while we are at it. ->audit_init_rule() and ->audit_match_rule() get new values now; in-tree instances updated. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | clean up audit_rule_{add,del} a bitAl Viro2009-01-041-25/+17
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | make sure that filterkey of task,always rules is reportedAl Viro2009-01-041-4/+11
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | audit rules ordering, part 2Al Viro2009-01-042-56/+40
| | | | | | | | | | | | | | | | | | | | | | | | Fix the actual rule listing; add per-type lists _not_ used for matching, with all exit,... sitting on one such list. Simplifies "do something for all rules" logics, while we are at it... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | fixing audit rule ordering mess, part 1Al Viro2009-01-043-43/+58
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Problem: ordering between the rules on exit chain is currently lost; all watch and inode rules are listed after everything else _and_ exit,never on one kind doesn't stop exit,always on another from being matched. Solution: assign priorities to rules, keep track of the current highest-priority matching rule and its result (always/never). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | audit_update_lsm_rules() misses the audit_inode_hash[] onesAl Viro2009-01-041-30/+47
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | sanitize audit_log_capset()Al Viro2009-01-042-31/+17
| | | | | | | | | | | | | | | | | | | | | | | | * no allocations * return void * don't duplicate checked for dummy context Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | sanitize audit_fd_pair()Al Viro2009-01-041-30/+14
| | | | | | | | | | | | | | | | | | | | | * no allocations * return void Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | sanitize audit_mq_open()Al Viro2009-01-041-42/+23
| | | | | | | | | | | | | | | | | | | | | | | | * don't bother with allocations * don't do double copy_from_user() * don't duplicate parts of check for audit_dummy_context() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | sanitize AUDIT_MQ_SENDRECVAl Viro2009-01-041-98/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * logging the original value of *msg_prio in mq_timedreceive(2) is insane - the argument is write-only (i.e. syscall always ignores the original value and only overwrites it). * merge __audit_mq_timed{send,receive} * don't do copy_from_user() twice * don't mess with allocations in auditsc part * ... and don't bother checking !audit_enabled and !context in there - we'd already checked for audit_dummy_context(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | sanitize audit_mq_notify()Al Viro2009-01-041-40/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | * don't copy_from_user() twice * don't bother with allocations * don't duplicate parts of audit_dummy_context() * make it return void Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | sanitize audit_mq_getsetattr()Al Viro2009-01-041-37/+17
| | | | | | | | | | | | | | | | | | | | | | | | * get rid of allocations * make it return void * don't duplicate parts of audit_dummy_context() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | sanitize audit_ipc_set_perm()Al Viro2009-01-041-33/+26
| | | | | | | | | | | | | | | | | | | | | | | | * get rid of allocations * make it return void * simplify callers Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | sanitize audit_ipc_obj()Al Viro2009-01-041-51/+37
| | | | | | | | | | | | | | | | | | | | | | | | * get rid of allocations * make it return void * simplify callers Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | sanitize audit_socketcallAl Viro2009-01-041-28/+38
| | | | | | | | | | | | | | | | | | | | | * don't bother with allocations * now that it can't fail, make it return void Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | don't reallocate buffer in every audit_sockaddr()Al Viro2009-01-041-24/+22
| |/ | | | | | | | | | | | | No need to do that more than once per process lifetime; allocating/freeing on each sendto/accept/etc. is bloody pointless. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* / cgroups: fix a race between cgroup_clone and umountLi Zefan2009-01-041-1/+5
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The race is calling cgroup_clone() while umounting the ns cgroup subsys, and thus cgroup_clone() might access invalid cgroup_fs, or kill_sb() is called after cgroup_clone() created a new dir in it. The BUG I triggered is BUG_ON(root->number_of_cgroups != 1); ------------[ cut here ]------------ kernel BUG at kernel/cgroup.c:1093! invalid opcode: 0000 [#1] SMP ... Process umount (pid: 5177, ti=e411e000 task=e40c4670 task.ti=e411e000) ... Call Trace: [<c0493df7>] ? deactivate_super+0x3f/0x51 [<c04a3600>] ? mntput_no_expire+0xb3/0xdd [<c04a3ab2>] ? sys_umount+0x265/0x2ac [<c04a3b06>] ? sys_oldumount+0xd/0xf [<c0403911>] ? sysenter_do_call+0x12/0x31 ... EIP: [<c0456e76>] cgroup_kill_sb+0x23/0xe0 SS:ESP 0068:e411ef2c ---[ end trace c766c1be3bf944ac ]--- Cc: Serge E. Hallyn <serue@us.ibm.com> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Paul Menage <menage@google.com> Cc: "Serge E. Hallyn" <serue@us.ibm.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'cpus4096-for-linus-3' of ↵Linus Torvalds2009-01-0329-420/+495
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (77 commits) x86: setup_per_cpu_areas() cleanup cpumask: fix compile error when CONFIG_NR_CPUS is not defined cpumask: use alloc_cpumask_var_node where appropriate cpumask: convert shared_cpu_map in acpi_processor* structs to cpumask_var_t x86: use cpumask_var_t in acpi/boot.c x86: cleanup some remaining usages of NR_CPUS where s/b nr_cpu_ids sched: put back some stack hog changes that were undone in kernel/sched.c x86: enable cpus display of kernel_max and offlined cpus ia64: cpumask fix for is_affinity_mask_valid() cpumask: convert RCU implementations, fix xtensa: define __fls mn10300: define __fls m32r: define __fls h8300: define __fls frv: define __fls cris: define __fls cpumask: CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS cpumask: zero extra bits in alloc_cpumask_var_node cpumask: replace for_each_cpu_mask_nr with for_each_cpu in kernel/time/ cpumask: convert mm/ ...
| * sched: put back some stack hog changes that were undone in kernel/sched.cMike Travis2009-01-032-39/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: prevents panic from stack overflow on numa-capable machines. Some of the "removal of stack hogs" changes in kernel/sched.c by using node_to_cpumask_ptr were undone by the early cpumask API updates, and causes a panic due to stack overflow. This patch undoes those changes by using cpumask_of_node() which returns a 'const struct cpumask *'. In addition, cpu_coregoup_map is replaced with cpu_coregroup_mask further reducing stack usage. (Both of these updates removed 9 FIXME's!) Also: Pick up some remaining changes from the old 'cpumask_t' functions to the new 'struct cpumask *' functions. Optimize memory traffic by allocating each percpu local_cpu_mask on the same node as the referring cpu. Signed-off-by: Mike Travis <travis@sgi.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * ia64: cpumask fix for is_affinity_mask_valid()Ingo Molnar2009-01-031-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: build fix on ia64 ia64's default_affinity_write() still had old cpumask_t usage: /home/mingo/tip/kernel/irq/proc.c: In function `default_affinity_write': /home/mingo/tip/kernel/irq/proc.c:114: error: incompatible type for argument 1 of `is_affinity_mask_valid' make[3]: *** [kernel/irq/proc.o] Error 1 make[3]: *** Waiting for unfinished jobs.... update it to cpumask_var_t. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * cpumask: convert RCU implementations, fixIngo Molnar2009-01-031-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup This warning: kernel/rcuclassic.c: In function ‘rcu_start_batch’: kernel/rcuclassic.c:397: warning: passing argument 1 of ‘cpumask_andnot’ from incompatible pointer type triggers because one usage site of rcp->cpumask was not converted to to_cpumask(rcp->cpumask). There's no ill effects of this bug. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * Merge branch 'master' of ↵Mike Travis2009-01-0381-2040/+4636
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask Conflicts: arch/x86/kernel/io_apic.c kernel/rcuclassic.c kernel/sched.c kernel/time/tick-sched.c Signed-off-by: Mike Travis <travis@sgi.com> [ mingo@elte.hu: backmerged typo fix for io_apic.c ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * cpumask: replace for_each_cpu_mask_nr with for_each_cpu in kernel/time/Rusty Russell2009-01-012-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup Simple replacement, now the _nr is redundant. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com> Cc: Ingo Molnar <mingo@redhat.com>
| | * cpumask: convert rest of files in kernel/Rusty Russell2009-01-014-24/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Reduce stack usage, use new cpumask API. Mainly changing cpumask_t to 'struct cpumask' and similar simple API conversion. Two conversions worth mentioning: 1) we use cpumask_any_but to avoid a temporary in kernel/softlockup.c, 2) Use cpumask_var_t in taskstats_user_cmd(). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@redhat.com>
| | * cpumask: convert kernel/cpu.cRusty Russell2009-01-011-19/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Reduce kernel stack and memory usage, use new cpumask API. Use cpumask_var_t for take_cpu_down() stack var, and frozen_cpus. Note that notify_cpu_starting() can be called before core_initcall allocates frozen_cpus, but the NULL check is optimized out by gcc for the CONFIG_CPUMASK_OFFSTACK=n case. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * cpumask: convert kernel/profile.cRusty Russell2009-01-011-13/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Reduce kernel memory usage, use new cpumask API. Avoid a static cpumask_t for prof_cpu_mask, and an on-stack cpumask_t in prof_cpu_mask_write_proc. Both become cpumask_var_t. prof_cpu_mask is only allocated when profiling is on, but the NULL checks are optimized out by gcc for the !CPUMASK_OFFSTACK case. Also removed some strange and unnecessary casts. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * cpumask: convert RCU implementationsRusty Russell2009-01-013-36/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: use new cpumask API. rcu_ctrlblk contains a cpumask, and it's highly optimized so I don't want a cpumask_var_t (ie. a pointer) for the CONFIG_CPUMASK_OFFSTACK case. It could use a dangling bitmap, and be allocated in __rcu_init to save memory, but for the moment we use a bitmap. (Eventually 'struct cpumask' will be undefined for CONFIG_CPUMASK_OFFSTACK, so we use a bitmap here to show we really mean it). We remove on-stack cpumasks, using cpumask_var_t for rcu_torture_shuffle_tasks() and for_each_cpu_and in force_quiescent_state(). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * cpumask: convert kernel/irqRusty Russell2009-01-012-13/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Reduce stack usage, use new cpumask API. ALPHA mod! Main change is that irq_default_affinity becomes a cpumask_var_t, so treat it as a pointer (this effects alpha). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * cpumask: convert kernel time functionsRusty Russell2009-01-013-61/+64
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Use new APIs Convert kernel/time functions to use struct cpumask *. Note the ugly bitmap declarations in tick-broadcast.c. These should be cpumask_var_t, but there was no obvious initialization function to put the alloc_cpumask_var() calls in. This was safe. (Eventually 'struct cpumask' will be undefined for CONFIG_CPUMASK_OFFSTACK, so we use a bitmap here to show we really mean it). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com>
| | * cpumask: convert kernel/workqueue.cRusty Russell2009-01-011-12/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Reduce memory usage, use new cpumask API. cpu_populated_map becomes a cpumask_var_t, and cpu_singlethread_map is simply a cpumask pointer: it's simply the cpumask containing the first possible CPU anyway. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * cpumask: convert kernel/compat.cRusty Russell2009-01-011-19/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Reduce stack usage, use new cpumask API. Straightforward conversion; cpumasks' size is given by cpumask_size() (now a variable rather than fixed) and on-stack cpu masks use cpumask_var_t. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * cpumask: remove any_online_cpu() users: kernel/Rusty Russell2009-01-012-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Remove obsolete API usage any_online_cpu() is a good name, but it takes a cpumask_t, not a pointer. There are several places where any_online_cpu() doesn't really want a mask arg at all. Replace all callers with cpumask_any() and cpumask_any_and(). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com>
| | * cpumask: convert kernel trace functions furtherRusty Russell2009-01-016-10/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Reduce future memory usage, use new cpumask API. Since the last patch was created and acked, more old cpumask users slipped into kernel/trace. Mostly trivial conversions, except struct trace_iterator's "started" member becomes a cpumask_var_t. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * cpumask: convert kernel trace functionsRusty Russell2009-01-013-51/+64
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Reduce future memory usage, use new cpumask API. (Eventually, cpumask_var_t will be allocated based on nr_cpu_ids, not NR_CPUS). Convert kernel trace functions to use struct cpumask API: 1) Use cpumask_copy/cpumask_test_cpu/for_each_cpu. 2) Use cpumask_var_t and alloc_cpumask_var/free_cpumask_var everywhere. 3) Use on_each_cpu instead of playing with current->cpus_allowed. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com> Acked-by: Steven Rostedt <rostedt@goodmis.org>
| | * cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits.: coreRusty Russell2009-01-012-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup In future, all cpumask ops will only be valid (in general) for bit numbers < nr_cpu_ids. So use that instead of NR_CPUS in iterators and other comparisons. This is always safe: no cpu number can be >= nr_cpu_ids, and nr_cpu_ids is initialized to NR_CPUS at boot. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com> Acked-by: Ingo Molnar <mingo@elte.hu> Acked-by: James Morris <jmorris@namei.org> Cc: Eric Biederman <ebiederm@xmission.com>
| | * Merge branch 'master' of ↵Rusty Russell2008-12-3143-689/+2673
| | |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 Conflicts: arch/x86/kernel/io_apic.c
| | * | cpumask: arch_send_call_function_ipi_mask: coreRusty Russell2008-12-291-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: new API to reduce stack usage We're weaning the core code off handing cpumask's around on-stack. This introduces arch_send_call_function_ipi_mask(). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * | cpumask: smp_call_function_many()Rusty Russell2008-12-291-90/+49
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Implementation change to remove cpumask_t from stack. Actually change smp_call_function_mask() to smp_call_function_many(). We avoid cpumasks on the stack in this version. (S390 has its own version, but that's going away apparently). We have to do some dancing to figure out if 0 or 1 other cpus are in the mask supplied and the online mask without allocating a tmp cpumask. It's still fairly cheap. We allocate the cpumask at the end of the call_function_data structure: if allocation fails we fallback to smp_call_function_single rather than using the baroque quiescing code (which needs a cpumask on stack). (Thanks to Hiroshi Shimamoto for spotting several bugs in previous versions!) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com> Cc: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Cc: npiggin@suse.de Cc: axboe@kernel.dk
| | * | cpumask: make set_cpu_*/init_cpu_* out-of-lineRusty Russell2008-12-291-0/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | They're only for use in boot/cpu hotplug code anyway, and this avoids the use of deprecated cpu_*_map. Stephen Rothwell points out that gcc 4.2.4 (on powerpc at least) didn't like the cast away of const anyway: include/linux/cpumask.h: In function 'set_cpu_possible': include/linux/cpumask.h:1052: warning: passing argument 2 of 'cpumask_set_cpu' discards qualifiers from pointer target type So this kills two birds with one stone. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * | cpumask: switch over to cpu_online/possible/active/present_mask: coreRusty Russell2008-12-291-26/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup This implements the obsolescent cpu_online_map in terms of cpu_online_mask, rather than the other way around. Same for the other maps. The documentation comments are also updated to refer to _mask rather than _map. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-29 05:48:28 +0100