Messages in this thread | | | Date | Tue, 5 Feb 2008 16:33:03 +0530 | From | Dhaval Giani <> | Subject | Re: OOM-killer invoked but why ? |
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On Tue, Feb 05, 2008 at 02:07:37AM -0800, Andrew Morton wrote: > On Thu, 31 Jan 2008 13:53:05 +0100 Claude Frantz <r31dmaeu@pc0312b.rz.unibw-muenchen.de> wrote: > > > Hello ! > > > > I'm faced to a problem where the OOM-killer is invoked but I cannot find > > the reason why. The machine is rather powerfull, the load is very moderate, > > the disk swap space is nearly unused. The only strange observation which > > appears to me is the slow but progressive decreasing of kbbuffers during > > many hours. > > > > Can you help me to diagnose the problem and to find a good solution ? > > > > ... > > > > Jan 28 03:50:49 toaster kernel: 177466 pages slab > > Jan 28 03:50:49 toaster kernel: 1915 pages pagetables > > Jan 28 03:50:49 toaster kernel: Out of memory: kill process 10859 (amavisd) score 36218 or a child > > Jan 28 03:50:49 toaster kernel: Killed process 19146 (amavisd) > > slab. Maybe you've been bitten by the quicklist leak. If you're able to > patch your kernel then please try this fix: > > commit 96990a4ae979df9e235d01097d6175759331e88c > Author: Christoph Lameter <clameter@sgi.com> > Date: Mon Jan 14 00:55:14 2008 -0800 > > 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> > > diff --git a/mm/quicklist.c b/mm/quicklist.c > index ae8189c..3f703f7 100644 > --- a/mm/quicklist.c > +++ b/mm/quicklist.c > @@ -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); > } > > > I note that this didn't have the stable@kernel.org cc. Christoph, did we > deliberately decide not to backport? >
According to http://archive.netbsd.se/?ml=linux-stable-commits&a=2008-01&m=6134301 , its been added to the stable tree. I remember asking Greg to add it.
Thanks -- regards, Dhaval
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