ARM: 7178/1: fault.c: Port OOM changes into do_page_fault

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Commit d065bd810b
(mm: retry page fault when blocking on disk transfer) and
commit 37b23e0525
(x86,mm: make pagefault killable)

The above commits introduced changes into the x86 pagefault handler
for making the page fault handler retryable as well as killable.

These changes reduce the mmap_sem hold time, which is crucial
during OOM killer invocation.

Port these changes to ARM.

Without these changes, my ARM board encounters many hang and livelock
scenarios.
After applying this patch, OOM feature performance improves according to
my testing.

Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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Kautuk Consul 2011-11-27 17:49:50 +01:00 • committed by Russell King

parent df0e74da6d

commit 8878a539ff

1 changed files with 39 additions and 19 deletions

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arch/arm/mm/fault.c

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