tree ebc59003d3bef08dd41d073eced2b53970e13662
parent dc3f21eadeea6d9898271ff32d35d5e00c6872ea
author Konstantin Khlebnikov <khlebnikov@openvz.org> 1332372828 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1332377695 -0700

mm: add rss counters consistency check

Warn about non-zero rss counters at final mmdrop.

This check will prevent reoccurences of bugs such as that fixed in "mm:
fix rss count leakage during migration".

I didn't hide this check under CONFIG_VM_DEBUG because it rather small and
rss counters cover whole page-table management, so this is a good
invariant.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>