tree 3ff63fde8534eb615b408d047b461015781f6a5b
parent 8e30f272a93ec9c1d5c305c5040dfaebc880499d
author Nick Piggin <nickpiggin@yahoo.com.au> 1114963116 -0700
committer Linus Torvalds <torvalds@ppc970.osdl.org> 1114963116 -0700

[PATCH] mempool: NOMEMALLOC and NORETRY

Mempools have 2 problems.

The first is that mempool_alloc can possibly get stuck in __alloc_pages
when they should opt to fail, and take an element from their reserved pool.

The second is that it will happily eat emergency PF_MEMALLOC reserves
instead of going to their reserved pools.

Fix the first by passing __GFP_NORETRY in the allocation calls in
mempool_alloc.  Fix the second by introducing a __GFP_MEMPOOL flag which
directs the page allocator not to allocate from the reserve pool.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>