Messages in this thread Patch in this message | | | Date | Tue, 14 Aug 2007 08:30:29 -0700 | From | Christoph Lameter <> | Subject | [RFC 8/9] Reclaim on an atomic allocation if necessary |
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Simply call reclaim if we get to a point where we cannot perform the desired atomic allocation. If the reclaim is successful then restart the allocation.
This will allow atomic allocs to not run out of memory. We reclaim clean pages instead. If we are in an interrupt then the interrupt holdoff will be long since reclaim processing is intensive. However, we will no longer OOM.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
--- mm/page_alloc.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
Index: linux-2.6/mm/page_alloc.c =================================================================== --- linux-2.6.orig/mm/page_alloc.c 2007-08-14 07:42:09.000000000 -0700 +++ linux-2.6/mm/page_alloc.c 2007-08-14 07:53:34.000000000 -0700 @@ -1326,8 +1326,12 @@ nofail_alloc: } /* Atomic allocations - we can't balance anything */ - if (!wait) + if (!wait) { + if (try_to_free_pages(zonelist->zones, order, gfp_mask + | __GFP_NOMEMALLOC)) + goto restart; goto nopage; + } cond_resched(); -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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