From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <20070504103156.997011750@chello.nl> References: <20070504102651.923946304@chello.nl> Date: Fri, 04 May 2007 12:26:58 +0200 From: Peter Zijlstra Subject: [PATCH 07/40] mm: allow mempool to fall back to memalloc reserves Content-Disposition: inline; filename=mm-mempool_fixup.patch Sender: owner-linux-mm@kvack.org Return-Path: To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org Cc: Peter Zijlstra , Trond Myklebust , Thomas Graf , David Miller , James Bottomley , Mike Christie , Andrew Morton , Daniel Phillips List-ID: Allow the mempool to use the memalloc reserves when all else fails and the allocation context would otherwise allow it. Signed-off-by: Peter Zijlstra --- mm/mempool.c | 10 ++++++++++ 1 file changed, 10 insertions(+) Index: linux-2.6-git/mm/mempool.c =================================================================== --- linux-2.6-git.orig/mm/mempool.c 2007-01-12 08:03:44.000000000 +0100 +++ linux-2.6-git/mm/mempool.c 2007-01-12 10:38:57.000000000 +0100 @@ -14,6 +14,7 @@ #include #include #include +#include "internal.h" static void add_element(mempool_t *pool, void *element) { @@ -229,6 +230,15 @@ repeat_alloc: } spin_unlock_irqrestore(&pool->lock, flags); + /* if we really had right to the emergency reserves try those */ + if (gfp_to_alloc_flags(gfp_mask) & ALLOC_NO_WATERMARKS) { + if (gfp_temp & __GFP_NOMEMALLOC) { + gfp_temp &= ~(__GFP_NOMEMALLOC|__GFP_NOWARN); + goto repeat_alloc; + } else + gfp_temp |= __GFP_NOMEMALLOC|__GFP_NOWARN; + } + /* We must not sleep in the GFP_ATOMIC case */ if (!(gfp_mask & __GFP_WAIT)) return NULL; -- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org