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Date: Wed, 18 Aug 2010 17:31:32 +0100 From: Chris Webb <chris@...chsys.com> To: Wu Fengguang <fengguang.wu@...el.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@...com>, Minchan Kim <minchan.kim@...il.com>, "linux-mm@...ck.org" <linux-mm@...ck.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, Pekka Enberg <penberg@...helsinki.fi>, Andi Kleen <andi@...stfloor.org>, Christoph Lameter <cl@...ux-foundation.org> Subject: Re: Over-eager swapping Wu Fengguang <fengguang.wu@...el.com> writes: > Chris, can you post /proc/vmstat on the problem machines? Here's /proc/vmstat from one of the bad machines with swap taken out: # cat /proc/vmstat nr_free_pages 115572 nr_inactive_anon 562140 nr_active_anon 5015609 nr_inactive_file 997097 nr_active_file 996989 nr_unevictable 1368 nr_mlock 1368 nr_anon_pages 5862299 nr_mapped 1414 nr_file_pages 1994569 nr_dirty 619 nr_writeback 0 nr_slab_reclaimable 88883 nr_slab_unreclaimable 129859 nr_page_table_pages 15744 nr_kernel_stack 1132 nr_unstable 0 nr_bounce 0 nr_vmscan_write 68708505 nr_writeback_temp 0 nr_isolated_anon 0 nr_isolated_file 0 nr_shmem 14 numa_hit 15295188815 numa_miss 9391232519 numa_foreign 9391232519 numa_interleave 16982 numa_local 15294742520 numa_other 9391678814 pgpgin 20644565778 pgpgout 28740368207 pswpin 63818244 pswpout 61199234 pgalloc_dma 0 pgalloc_dma32 4967135753 pgalloc_normal 19812671901 pgalloc_movable 0 pgfree 24779926775 pgactivate 1290396237 pgdeactivate 1289759899 pgfault 19993995783 pgmajfault 21059190 pgrefill_dma 0 pgrefill_dma32 133366009 pgrefill_normal 921184739 pgrefill_movable 0 pgsteal_dma 0 pgsteal_dma32 1275354745 pgsteal_normal 5641309780 pgsteal_movable 0 pgscan_kswapd_dma 0 pgscan_kswapd_dma32 1333139288 pgscan_kswapd_normal 5870516663 pgscan_kswapd_movable 0 pgscan_direct_dma 0 pgscan_direct_dma32 1064518 pgscan_direct_normal 13317302 pgscan_direct_movable 0 zone_reclaim_failed 0 pginodesteal 0 slabs_scanned 1682790400 kswapd_steal 6902288285 kswapd_inodesteal 4909342 pageoutrun 65408579 allocstall 33223 pgrotated 68402979 htlb_buddy_alloc_success 0 htlb_buddy_alloc_fail 0 unevictable_pgs_culled 3538872 unevictable_pgs_scanned 0 unevictable_pgs_rescued 4989403 unevictable_pgs_mlocked 5192009 unevictable_pgs_munlocked 4989074 unevictable_pgs_cleared 2295 unevictable_pgs_stranded 0 unevictable_pgs_mlockfreed 0 The not-so-bad machine that's 3G in swap that I mentioned previously has # cat /proc/vmstat nr_free_pages 898394 nr_inactive_anon 834445 nr_active_anon 4118034 nr_inactive_file 904411 nr_active_file 910902 nr_unevictable 2440 nr_mlock 2440 nr_anon_pages 4836349 nr_mapped 1553 nr_file_pages 2243152 nr_dirty 1097 nr_writeback 0 nr_slab_reclaimable 88788 nr_slab_unreclaimable 127310 nr_page_table_pages 14762 nr_kernel_stack 532 nr_unstable 0 nr_bounce 0 nr_vmscan_write 37404214 nr_writeback_temp 0 nr_isolated_anon 0 nr_isolated_file 0 nr_shmem 12 numa_hit 14220178949 numa_miss 3903552922 numa_foreign 3903552922 numa_interleave 16282 numa_local 14219905325 numa_other 3903826546 pgpgin 6500403846 pgpgout 13255814979 pswpin 36384510 pswpout 36380545 pgalloc_dma 4 pgalloc_dma32 2019546454 pgalloc_normal 16466621455 pgalloc_movable 0 pgfree 18487068066 pgactivate 530670561 pgdeactivate 506674301 pgfault 19986735100 pgmajfault 10611234 pgrefill_dma 0 pgrefill_dma32 41306492 pgrefill_normal 318767138 pgrefill_movable 0 pgsteal_dma 0 pgsteal_dma32 214447663 pgsteal_normal 1645250232 pgsteal_movable 0 pgscan_kswapd_dma 0 pgscan_kswapd_dma32 218030201 pgscan_kswapd_normal 1812499810 pgscan_kswapd_movable 0 pgscan_direct_dma 0 pgscan_direct_dma32 157144 pgscan_direct_normal 1095919 pgscan_direct_movable 0 zone_reclaim_failed 0 pginodesteal 0 slabs_scanned 50051072 kswapd_steal 1858447127 kswapd_inodesteal 202297 pageoutrun 15070446 allocstall 3104 pgrotated 37181651 htlb_buddy_alloc_success 0 htlb_buddy_alloc_fail 0 unevictable_pgs_culled 2113384 unevictable_pgs_scanned 0 unevictable_pgs_rescued 3055005 unevictable_pgs_mlocked 3184675 unevictable_pgs_munlocked 3045129 unevictable_pgs_cleared 10034 unevictable_pgs_stranded 0 unevictable_pgs_mlockfreed 0 Best wishes, Chris. -- 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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