[PATCH] mmap topdown fix for large stack limit, large allocation
commit73219d178051691a56d57184d8c7f6d0cbe3c5c1
authorChris Wright <chrisw@osdl.org>
Wed, 22 Jun 2005 00:14:52 +0000 (21 17:14 -0700)
committerLinus Torvalds <torvalds@ppc970.osdl.org>
Wed, 22 Jun 2005 01:46:16 +0000 (21 18:46 -0700)
treec527691510f5a2b757eac424c5671704084fc9eb
parent1363c3cd8603a913a27e2995dccbd70d5312d8e6
[PATCH] mmap topdown fix for large stack limit, large allocation

The topdown changes in 2.6.12-rc1 can cause large allocations with large
stack limit to fail, despite there being space available.  The
mmap_base-len is only valid when len >= mmap_base.  However, nothing in
topdown allocator checks this.  It's only (now) caught at higher level,
which will cause allocation to simply fail.  The following change restores
the fallback to bottom-up path, which will allow large allocations with
large stack limit to potentially still succeed.

Signed-off-by: Chris Wright <chrisw@osdl.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
mm/mmap.c