]> nv-tegra.nvidia Code Review - linux-2.6.git/commit
mm: fix assertion
authorNick Piggin <npiggin@suse.de>
Wed, 14 Jan 2009 06:28:16 +0000 (07:28 +0100)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 14 Jan 2009 15:32:44 +0000 (07:32 -0800)
commit18e6959c385f3edf3991fa6662a53dac4eb10d5b
tree9cb7911e022ce8943bdfb3f6611ce758963abb67
parenta6525042bfdfcab128bd91fad264de10fd24a55e
mm: fix assertion

This assertion is incorrect for lockless pagecache.  By definition if we
have an unpinned page that we are trying to take a speculative reference
to, it may become the tail of a compound page at any time (if it is
freed, then reallocated as a compound page).

It was still a valid assertion for the vmscan.c LRU isolation case, but
it doesn't seem incredibly helpful...  if somebody wants it, they can
put it back directly where it applies in the vmscan code.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/mm.h