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quicklists: Only consider memory that can be used with GFP_KERNEL 

Quicklists calculates the size of the quicklists based on the number of
free pages.  This must be the number of free pages that can be allocated
with GFP_KERNEL.  node_page_state() includes the pages in ZONE_HIGHMEM and
ZONE_MOVABLE which may lead the quicklists to become too large causing OOM.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Tested-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Lameter 2008-01-14 00:55:14 -08:00 committed by Linus Torvalds
parent 8f4c79ce79
commit 96990a4ae9
1 changed files with 10 additions and 2 deletions
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12
mm/quicklist.c
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@ -26,9 +26,17 @@ DEFINE_PER_CPU(struct quicklist, quicklist)[CONFIG_NR_QUICK];
static unsigned long max_pages(unsigned long min_pages)
{
unsigned long node_free_pages, max;
struct zone *zones = NODE_DATA(numa_node_id())->node_zones;
node_free_pages =
#ifdef CONFIG_ZONE_DMA
zone_page_state(&zones[ZONE_DMA], NR_FREE_PAGES) +
#endif
#ifdef CONFIG_ZONE_DMA32
zone_page_state(&zones[ZONE_DMA32], NR_FREE_PAGES) +
#endif
zone_page_state(&zones[ZONE_NORMAL], NR_FREE_PAGES);
node_free_pages = node_page_state(numa_node_id(),
NR_FREE_PAGES);
max = node_free_pages / FRACTION_OF_NODE_MEM;
return max(max, min_pages);
}