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| author | Tony Luck <tony.luck@intel.com> | 2011-03-16 17:58:31 +0100 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2011-03-16 17:58:31 +0100 |
| commit | afe997a183ecc0be72652c7a5ce2152bdf91724e (patch) | |
| tree | 307ec69f546700d1aac7a9bc23853f6e4ae875a0 /Documentation/ABI | |
| parent | Pull misc-2.6.39 into release branch (diff) | |
| parent | pstore: fix build warning for unused return value from sysfs_create_file (diff) | |
| download | linux-afe997a183ecc0be72652c7a5ce2152bdf91724e.tar.xz linux-afe997a183ecc0be72652c7a5ce2152bdf91724e.zip | |
Pull pstorev4 into release branch
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/pstore | 35 | ||||
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-pstore | 7 |
2 files changed, 42 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/pstore b/Documentation/ABI/testing/pstore new file mode 100644 index 000000000000..f1fb2a004264 --- /dev/null +++ b/Documentation/ABI/testing/pstore @@ -0,0 +1,35 @@ +Where: /dev/pstore/... +Date: January 2011 +Kernel Version: 2.6.38 +Contact: tony.luck@intel.com +Description: Generic interface to platform dependent persistent storage. + + Platforms that provide a mechanism to preserve some data + across system reboots can register with this driver to + provide a generic interface to show records captured in + the dying moments. In the case of a panic the last part + of the console log is captured, but other interesting + data can also be saved. + + # mount -t pstore - /dev/pstore + + $ ls -l /dev/pstore + total 0 + -r--r--r-- 1 root root 7896 Nov 30 15:38 dmesg-erst-1 + + Different users of this interface will result in different + filename prefixes. Currently two are defined: + + "dmesg" - saved console log + "mce" - architecture dependent data from fatal h/w error + + Once the information in a file has been read, removing + the file will signal to the underlying persistent storage + device that it can reclaim the space for later re-use. + + $ rm /dev/pstore/dmesg-erst-1 + + The expectation is that all files in /dev/pstore + will be saved elsewhere and erased from persistent store + soon after boot to free up space ready for the next + catastrophe. diff --git a/Documentation/ABI/testing/sysfs-fs-pstore b/Documentation/ABI/testing/sysfs-fs-pstore new file mode 100644 index 000000000000..8e659d854805 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-fs-pstore @@ -0,0 +1,7 @@ +What: /sys/fs/pstore/kmsg_bytes +Date: January 2011 +Kernel Version: 2.6.38 +Contact: "Tony Luck" <tony.luck@intel.com> +Description: + Controls amount of console log that will be saved + to persistent store on oops/panic. |