From: Nick Piggin <npiggin@suse.de>
Date: Thu, 17 May 2007 05:11:21 +0000 (-0700)
Subject: mm: more rmap checking
X-Git-Tag: v2.6.22-rc2~32
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c97a9e10eaee328e6eea9f76acf7bacd7d48ef56;p=pandora-kernel.git

mm: more rmap checking

Re-introduce rmap verification patches that Hugh removed when he removed
PG_map_lock. PG_map_lock actually isn't needed to synchronise access to
anonymous pages, because PG_locked and PTL together already do.

These checks were important in discovering and fixing a rare rmap corruption
in SLES9.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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