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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-16 19:01:29 -0700 |
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| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-16 19:01:29 -0700 |
| commit | 242e5d06be2ad2633c85313a37862e03f4450a46 (patch) | |
| tree | 9a75e5efed6ee9a4f5d9769b851ab503c1fb5ef2 /Documentation | |
| parent | Merge branch 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6 (diff) | |
| parent | Pull pstorev4 into release branch (diff) | |
| download | linux-dev-242e5d06be2ad2633c85313a37862e03f4450a46.tar.xz linux-dev-242e5d06be2ad2633c85313a37862e03f4450a46.zip | |
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] tioca: Fix assignment from incompatible pointer warnings
[IA64] mca.c: Fix cast from integer to pointer warning
[IA64] setup.c Typo fix "Architechtuallly"
[IA64] Add CONFIG_MISC_DEVICES=y to configs that need it.
[IA64] disable interrupts at end of ia64_mca_cpe_int_handler()
[IA64] Add DMA_ERROR_CODE define.
pstore: fix build warning for unused return value from sysfs_create_file
pstore: X86 platform interface using ACPI/APEI/ERST
pstore: new filesystem interface to platform persistent storage
Diffstat (limited to 'Documentation')
| -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. |