From: Kautuk Consul <consul.kautuk@gmail.com>
Date: Sat, 31 Mar 2012 12:05:39 +0000 (-0400)
Subject: tile/mm/fault.c: Port OOM changes to handle_page_fault
X-Git-Tag: v3.5-rc1~76^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4ce6bea220f1a40aba928bd5624ada833ee1c52b;p=pandora-kernel.git

tile/mm/fault.c: Port OOM changes to handle_page_fault

Commit d065bd810b6deb67d4897a14bfe21f8eb526ba99
(mm: retry page fault when blocking on disk transfer) and
commit 37b23e0525d393d48a7d59f870b3bc061a30ccdb
(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 tile.

Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com>
[cmetcalf@tilera.com: initialize "flags" after "write" updated.]
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
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