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pstore: use mount option instead sysfs to tweak kmsg_bytes

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/sys/fs is a somewhat strange way to tweak what could more
obviously be tuned with a mount option.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Luck, Tony
2011-03-18 15:33:43 -07:00
committed by Linus Torvalds
parent 10effcb548
commit 366f7e7a79
5 changed files with 59 additions and 47 deletions
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12
Documentation/ABI/testing/pstore
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@@ -1,6 +1,6 @@
Where: /dev/pstore/...
Date: January 2011
Kernel Version: 2.6.38
Date: March 2011
Kernel Version: 2.6.39
Contact: tony.luck@intel.com
Description: Generic interface to platform dependent persistent storage.
@@ -11,7 +11,7 @@ Description: Generic interface to platform dependent persistent storage.
of the console log is captured, but other interesting
data can also be saved.
# mount -t pstore - /dev/pstore
# mount -t pstore -o kmsg_bytes=8000 - /dev/pstore
$ ls -l /dev/pstore
total 0
@@ -33,3 +33,9 @@ Description: Generic interface to platform dependent persistent storage.
will be saved elsewhere and erased from persistent store
soon after boot to free up space ready for the next
catastrophe.
The 'kmsg_bytes' mount option changes the target amount of
data saved on each oops/panic. Pstore saves (possibly
multiple) files based on the record size of the underlying
persistent storage until at least this amount is reached.
Default is 10 Kbytes.