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fault-injection: add min-order parameter to fail_page_alloc

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Limiting smaller allocation failures by fault injection helps to find real
possible bugs.  Because higher order allocations are likely to fail and
zero-order allocations are not likely to fail.

This patch adds min-order parameter to fail_page_alloc.  It specifies the
minimum page allocation order to be injected failures.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Akinobu Mita 2007-07-15 23:40:23 -07:00 • committed by Linus Torvalds
parent 203a2935c7
commit 54114994f4
2 changed files with 16 additions and 1 deletions
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5
Documentation/fault-injection/fault-injection.txt
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@ -103,6 +103,11 @@ configuration of fault-injection capabilities.
default is 'N', setting it to 'Y' will inject failures
only into non-sleep allocations (GFP_ATOMIC allocations).
- /debug/fail_page_alloc/min-order:
specifies the minimum page allocation order to be injected
failures.
o Boot option
In order to inject faults while debugfs is not available (early boot time),