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Message-ID: <507688CC.9000104@suse.cz> Date: Thu, 11 Oct 2012 10:52:28 +0200 From: Jiri Slaby <jslaby@...e.cz> To: linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>, Jiri Slaby <jirislaby@...il.com> Subject: kswapd0: wxcessive CPU usage Hi, with 3.6.0-next-20121008, kswapd0 is spinning my CPU at 100% for 1 minute or so. If I try to suspend to RAM, this trace appears: kswapd0 R running task 0 577 2 0x00000000 0000000000000000 00000000000000c0 cccccccccccccccd ffff8801c4146800 ffff8801c4b15c88 ffffffff8116ee05 0000000000003e32 ffff8801c3a79000 ffff8801c4b15ca8 ffffffff8116fdf8 ffff8801c480f398 ffff8801c3a79000 Call Trace: [<ffffffff8116ee05>] ? put_super+0x25/0x40 [<ffffffff8116fdd4>] ? grab_super_passive+0x24/0xa0 [<ffffffff8116ff99>] ? prune_super+0x149/0x1b0 [<ffffffff81131531>] ? shrink_slab+0xa1/0x2d0 [<ffffffff8113452d>] ? kswapd+0x66d/0xb60 [<ffffffff81133ec0>] ? try_to_free_pages+0x180/0x180 [<ffffffff810a2770>] ? kthread+0xc0/0xd0 [<ffffffff810a26b0>] ? kthread_create_on_node+0x130/0x130 [<ffffffff816a6c9c>] ? ret_from_fork+0x7c/0x90 [<ffffffff810a26b0>] ? kthread_create_on_node+0x130/0x130 # cat /proc/vmstat nr_free_pages 239962 nr_inactive_anon 89825 nr_active_anon 711136 nr_inactive_file 60386 nr_active_file 46668 nr_unevictable 0 nr_mlock 0 nr_anon_pages 500678 nr_mapped 41319 nr_file_pages 319317 nr_dirty 45 nr_writeback 0 nr_slab_reclaimable 21909 nr_slab_unreclaimable 21598 nr_page_table_pages 12131 nr_kernel_stack 491 nr_unstable 0 nr_bounce 0 nr_vmscan_write 1674280 nr_vmscan_immediate_reclaim 301662 nr_writeback_temp 0 nr_isolated_anon 0 nr_isolated_file 0 nr_shmem 212263 nr_dirtied 10620227 nr_written 9260939 nr_anon_transparent_hugepages 172 nr_free_cma 0 nr_dirty_threshold 31459 nr_dirty_background_threshold 15729 pgpgin 31311778 pgpgout 38987552 pswpin 0 pswpout 0 pgalloc_dma 0 pgalloc_dma32 245169455 pgalloc_normal 279685864 pgalloc_movable 0 pgfree 537318727 pgactivate 13126755 pgdeactivate 2482953 pgfault 645947575 pgmajfault 193427 pgrefill_dma 0 pgrefill_dma32 1124272 pgrefill_normal 1998033 pgrefill_movable 0 pgsteal_kswapd_dma 0 pgsteal_kswapd_dma32 2531015 pgsteal_kswapd_normal 3403006 pgsteal_kswapd_movable 0 pgsteal_direct_dma 0 pgsteal_direct_dma32 362488 pgsteal_direct_normal 1134511 pgsteal_direct_movable 0 pgscan_kswapd_dma 0 pgscan_kswapd_dma32 2693620 pgscan_kswapd_normal 5836491 pgscan_kswapd_movable 0 pgscan_direct_dma 0 pgscan_direct_dma32 368374 pgscan_direct_normal 1658486 pgscan_direct_movable 0 pgscan_direct_throttle 0 pginodesteal 258410 slabs_scanned 86459392 kswapd_inodesteal 3907549 kswapd_low_wmark_hit_quickly 15408 kswapd_high_wmark_hit_quickly 23113 kswapd_skip_congestion_wait 10 pageoutrun 2165627235 allocstall 11256 pgrotated 219624 compact_blocks_moved 4862077 compact_pages_moved 1970005 compact_pagemigrate_failed 1726156 compact_stall 21275 compact_fail 6589 compact_success 14686 htlb_buddy_alloc_success 0 htlb_buddy_alloc_fail 0 unevictable_pgs_culled 2799 unevictable_pgs_scanned 0 unevictable_pgs_rescued 22563 unevictable_pgs_mlocked 22563 unevictable_pgs_munlocked 22563 unevictable_pgs_cleared 0 unevictable_pgs_stranded 0 thp_fault_alloc 18725 thp_fault_fallback 64868 thp_collapse_alloc 9216 thp_collapse_alloc_failed 2031 thp_split 2146 Any ideas what it could be? -- js suse labs -- 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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