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Message-ID: <20090629151417.GA29796@localhost> Date: Mon, 29 Jun 2009 23:14:18 +0800 From: Wu Fengguang <fengguang.wu@...el.com> To: Minchan Kim <minchan.kim@...il.com> Cc: David Howells <dhowells@...hat.com>, Mel Gorman <mel@....ul.ie>, KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, Johannes Weiner <hannes@...xchg.org>, "riel@...hat.com" <riel@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>, LKML <linux-kernel@...r.kernel.org>, Christoph Lameter <cl@...ux-foundation.org>, "peterz@...radead.org" <peterz@...radead.org>, "tytso@....edu" <tytso@....edu>, "linux-mm@...ck.org" <linux-mm@...ck.org>, "elladan@...imo.com" <elladan@...imo.com>, "npiggin@...e.de" <npiggin@...e.de>, "Barnes, Jesse" <jesse.barnes@...el.com> Subject: Re: Found the commit that causes the OOMs On Mon, Jun 29, 2009 at 11:00:26PM +0800, Minchan Kim wrote: > On Mon, Jun 29, 2009 at 11:21 PM, David Howells<dhowells@...hat.com> wrote: > > Wu Fengguang <fengguang.wu@...el.com> wrote: > > > >> Sorry! This one compiles OK: > > > > Sadly that doesn't seem to work either: > > > > msgctl11 invoked oom-killer: gfp_mask=0x200da, order=0, oom_adj=0 > > msgctl11 cpuset=/ mems_allowed=0 > > Pid: 30858, comm: msgctl11 Not tainted 2.6.31-rc1-cachefs #146 > > Call Trace: > > [<ffffffff8107207e>] ? oom_kill_process.clone.0+0xa9/0x245 > > [<ffffffff81072345>] ? __out_of_memory+0x12b/0x142 > > [<ffffffff810723c6>] ? out_of_memory+0x6a/0x94 > > [<ffffffff81074a90>] ? __alloc_pages_nodemask+0x42e/0x51d > > [<ffffffff81080843>] ? do_wp_page+0x2c6/0x5f5 > > [<ffffffff810820c1>] ? handle_mm_fault+0x5dd/0x62f > > [<ffffffff81022c32>] ? do_page_fault+0x1f8/0x20d > > [<ffffffff812e069f>] ? page_fault+0x1f/0x30 > > Mem-Info: > > DMA per-cpu: > > CPU 0: hi: 0, btch: 1 usd: 0 > > CPU 1: hi: 0, btch: 1 usd: 0 > > DMA32 per-cpu: > > CPU 0: hi: 186, btch: 31 usd: 38 > > CPU 1: hi: 186, btch: 31 usd: 106 > > Active_anon:75040 active_file:0 inactive_anon:2031 > > inactive_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 > > free:1951 slab:41499 mapped:301 pagetables:60674 bounce:0 > > DMA free:3932kB min:60kB low:72kB high:88kB active_anon:2868kB inactive_anon:384kB active_file:0kB inactive_file:0kB unevictable:0kB present:15364kB pages_scanned:0 all_unreclaimable? no > > lowmem_reserve[]: 0 968 968 968 > > DMA32 free:3872kB min:3948kB low:4932kB high:5920kB active_anon:297292kB inactive_anon:7740kB active_file:0kB inactive_file:0kB unevictable:0kB present:992032kB pages_scanned:0 all_unreclaimable? no > > lowmem_reserve[]: 0 0 0 0 > > DMA: 7*4kB 0*8kB 0*16kB 0*32kB 1*64kB 0*128kB 1*256kB 1*512kB 1*1024kB 1*2048kB 0*4096kB = 3932kB > > DMA32: 500*4kB 2*8kB 0*16kB 0*32kB 1*64kB 0*128kB 1*256kB 1*512kB 1*1024kB 0*2048kB 0*4096kB = 3872kB > > 1928 total pagecache pages > > 0 pages in swap cache > > Swap cache stats: add 0, delete 0, find 0/0 > > Free swap = 0kB > > Total swap = 0kB > > 255744 pages RAM > > 5589 pages reserved > > 238251 pages shared > > 216210 pages non-shared > > Out of memory: kill process 25221 (msgctl11) score 130560 or a child > > Killed process 26379 (msgctl11) > > Totally, I can't understand this situation. > Now, this page allocation is order zero and It is just likely GFP_HIGHUSER. > So it's unlikely interrupt context. > > Buddy already has enough fallback DMA32, I think. > Why kernel can't allocate page for order 0 ? > Is it allocator bug ? Yes this time the OOM order/flags are much different from all previous OOMs. btw, I found that msgctl11 is pretty good at making a lot of SUnreclaim and PageTables pages: before during 1 during 2 after MemTotal: 3931880 kB MemTotal: 3931880 kB MemTotal: 3931880 kB MemTotal: 3931880 kB MemFree: 985944 kB MemFree: 1489364 kB MemFree: 2069184 kB MemFree: 2853900 kB Buffers: 41704 kB Buffers: 16080 kB Buffers: 16104 kB Buffers: 16200 kB Cached: 1899740 kB Cached: 126780 kB Cached: 129092 kB Cached: 130552 kB SwapCached: 0 kB SwapCached: 0 kB SwapCached: 0 kB SwapCached: 0 kB Active: 402420 kB Active: 812320 kB Active: 643868 kB Active: 354880 kB Inactive: 2325644 kB Inactive: 576732 kB Inactive: 578792 kB Inactive: 579640 kB Active(anon): 333720 kB Active(anon): 781264 kB Active(anon): 612632 kB Active(anon): 323448 kB Inactive(anon): 470764 kB Inactive(anon): 482792 kB Inactive(anon): 482680 kB Inactive(anon): 482268 kB Active(file): 68700 kB Active(file): 31056 kB Active(file): 31236 kB Active(file): 31432 kB Inactive(file): 1854880 kB Inactive(file): 93940 kB Inactive(file): 96112 kB Inactive(file): 97372 kB Unevictable: 4 kB Unevictable: 4 kB Unevictable: 4 kB Unevictable: 4 kB Mlocked: 4 kB Mlocked: 4 kB Mlocked: 4 kB Mlocked: 4 kB SwapTotal: 0 kB SwapTotal: 0 kB SwapTotal: 0 kB SwapTotal: 0 kB SwapFree: 0 kB SwapFree: 0 kB SwapFree: 0 kB SwapFree: 0 kB Dirty: 996 kB Dirty: 536 kB Dirty: 1348 kB Dirty: 212 kB Writeback: 0 kB Writeback: 0 kB Writeback: 0 kB Writeback: 0 kB AnonPages: 786772 kB AnonPages: 1246280 kB AnonPages: 1077352 kB AnonPages: 787856 kB Mapped: 53504 kB Mapped: 50420 kB Mapped: 50668 kB Mapped: 50716 kB Slab: 159340 kB Slab: 339708 kB Slab: 227164 kB Slab: 85272 kB SReclaimable: 125152 kB SReclaimable: 49188 kB SReclaimable: 48944 kB SReclaimable: 48508 kB SUnreclaim: 34188 kB SUnreclaim: 290520 kB SUnreclaim: 178220 kB SUnreclaim: 36764 kB PageTables: 17068 kB PageTables: 363716 kB PageTables: 204336 kB PageTables: 16620 kB NFS_Unstable: 0 kB NFS_Unstable: 0 kB NFS_Unstable: 0 kB NFS_Unstable: 0 kB Bounce: 0 kB Bounce: 0 kB Bounce: 0 kB Bounce: 0 kB WritebackTmp: 0 kB WritebackTmp: 0 kB WritebackTmp: 0 kB WritebackTmp: 0 kB CommitLimit: 1965940 kB CommitLimit: 1965940 kB CommitLimit: 1965940 kB CommitLimit: 1965940 kB Committed_AS: 1130516 kB Committed_AS: 79437584 kB Committed_AS: 43472636 kB Committed_AS: 1122240 kB VmallocTotal: 34359738367 kB VmallocTotal: 34359738367 kB VmallocTotal: 34359738367 kB VmallocTotal: 34359738367 kB VmallocUsed: 91504 kB VmallocUsed: 91504 kB VmallocUsed: 91504 kB VmallocUsed: 91504 kB VmallocChunk: 34359582075 kB VmallocChunk: 34359582075 kB VmallocChunk: 34359582075 kB VmallocChunk: 34359582075 kB HugePages_Total: 0 HugePages_Total: 0 HugePages_Total: 0 HugePages_Total: 0 HugePages_Free: 0 HugePages_Free: 0 HugePages_Free: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Rsvd: 0 HugePages_Rsvd: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 HugePages_Surp: 0 HugePages_Surp: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB Hugepagesize: 2048 kB Hugepagesize: 2048 kB Hugepagesize: 2048 kB DirectMap4k: 6848 kB DirectMap4k: 6848 kB DirectMap4k: 6848 kB DirectMap4k: 6848 kB DirectMap2M: 4120576 kB DirectMap2M: 4120576 kB DirectMap2M: 4120576 kB DirectMap2M: 4120576 kB My kernel is 2.6.30. Thanks, Fengguang -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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