I've been fighting a situation where the kernel appears to be running out of memory over a period of time. I originally had my low address space reserve set to 4096 and memory compaction on. I would get this error within a few days of reboot: Mar 06 19:25:03 [kernel] [168311.801139] DVBRead: page allocation failure: order:4, mode:0xc0d0 Mar 06 19:25:03 [kernel] [168311.801145] Pid: 15153, comm: DVBRead Tainted: G C 3.7.10-gentoo #3 Mar 06 19:25:03 [kernel] [168311.801146] Call Trace: Mar 06 19:25:03 [kernel] [168311.801160] [<ffffffff810e7e3b>] warn_alloc_failed+0xeb/0x130 Mar 06 19:25:03 [kernel] [168311.801163] [<ffffffff810eaddd>] ? __alloc_pages_direct_compact+0x1ed/0x200 Mar 06 19:25:03 [kernel] [168311.801166] [<ffffffff810eb6ec>] __alloc_pages_nodemask+0x8fc/0x9c0 Mar 06 19:25:03 [kernel] [168311.801175] [<ffffffff81598943>] ? usb_start_wait_urb+0xa3/0x160 Mar 06 19:25:03 [kernel] [168311.801179] [<ffffffff81121b41>] alloc_pages_current+0xb1/0x120 Mar 06 19:25:03 [kernel] [168311.801181] [<ffffffff81597d49>] ? usb_alloc_urb+0x19/0x50 Mar 06 19:25:03 [kernel] [168311.801184] [<ffffffff810e6fe9>] __get_free_pages+0x9/0x40 Mar 06 19:25:03 [kernel] [168311.801187] [<ffffffff8112752a>] kmalloc_order_trace+0x3a/0xb0 Mar 06 19:25:03 [kernel] [168311.801193] [<ffffffffa00c9483>] start_urb_transfer+0x83/0x1c0 [au0828] Mar 06 19:25:03 [kernel] [168311.801197] [<ffffffffa00c9698>] au0828_dvb_start_feed+0xd8/0x100 [au0828] Mar 06 19:25:03 [kernel] [168311.801201] [<ffffffff8160a6ae>] dmx_ts_feed_start_filtering+0x5e/0xf0 Mar 06 19:25:03 [kernel] [168311.801204] [<ffffffff81607a7c>] dvb_dmxdev_start_feed.clone.0+0xcc/0x120 Mar 06 19:25:03 [kernel] [168311.801206] [<ffffffff816085ec>] dvb_dmxdev_filter_start+0x28c/0x3b0 Mar 06 19:25:03 [kernel] [168311.801209] [<ffffffff81608d8a>] dvb_demux_do_ioctl+0x51a/0x6a0 Mar 06 19:25:03 [kernel] [168311.801211] [<ffffffff81606e04>] dvb_usercopy+0xa4/0x170 Mar 06 19:25:03 [kernel] [168311.801214] [<ffffffff81608870>] ? dvb_demux_open+0x160/0x160 Mar 06 19:25:03 [kernel] [168311.801217] [<ffffffff8110ab5b>] ? handle_mm_fault+0x13b/0x210 Mar 06 19:25:03 [kernel] [168311.801221] [<ffffffff8113e344>] ? do_filp_open+0x44/0xa0 Mar 06 19:25:03 [kernel] [168311.801224] [<ffffffff81607480>] dvb_demux_ioctl+0x10/0x20 Mar 06 19:25:03 [kernel] [168311.801226] [<ffffffff81140026>] do_vfs_ioctl+0x96/0x4f0 Mar 06 19:25:03 [kernel] [168311.801230] [<ffffffff81332654>] ? inode_has_perm.clone.25.clone.35+0x24/0x30 Mar 06 19:25:03 [kernel] [168311.801233] [<ffffffff81334f40>] ? file_has_perm+0x90/0xa0 Mar 06 19:25:03 [kernel] [168311.801236] [<ffffffff81140511>] sys_ioctl+0x91/0xa0 Mar 06 19:25:03 [kernel] [168311.801240] [<ffffffff818a9b52>] system_call_fastpath+0x16/0x1b Mar 06 19:25:03 [kernel] [168311.801242] Mem-Info: Mar 06 19:25:03 [kernel] [168311.801243] Node 0 DMA per-cpu: Mar 06 19:25:03 [kernel] [168311.801246] CPU 0: hi: 0, btch: 1 usd: 0 Mar 06 19:25:03 [kernel] [168311.801247] CPU 1: hi: 0, btch: 1 usd: 0 Mar 06 19:25:03 [kernel] [168311.801249] CPU 2: hi: 0, btch: 1 usd: 0 Mar 06 19:25:03 [kernel] [168311.801250] CPU 3: hi: 0, btch: 1 usd: 0 Mar 06 19:25:03 [kernel] [168311.801251] Node 0 DMA32 per-cpu: Mar 06 19:25:03 [kernel] [168311.801253] CPU 0: hi: 186, btch: 31 usd: 0 Mar 06 19:25:03 [kernel] [168311.801255] CPU 1: hi: 186, btch: 31 usd: 0 Mar 06 19:25:03 [kernel] [168311.801256] CPU 2: hi: 186, btch: 31 usd: 0 Mar 06 19:25:03 [kernel] [168311.801258] CPU 3: hi: 186, btch: 31 usd: 0 Mar 06 19:25:03 [kernel] [168311.801259] Node 0 Normal per-cpu: Mar 06 19:25:03 [kernel] [168311.801260] CPU 0: hi: 186, btch: 31 usd: 0 Mar 06 19:25:03 [kernel] [168311.801262] CPU 1: hi: 186, btch: 31 usd: 0 Mar 06 19:25:03 [kernel] [168311.801264] CPU 2: hi: 186, btch: 31 usd: 0 Mar 06 19:25:03 [kernel] [168311.801265] CPU 3: hi: 186, btch: 31 usd: 0 Mar 06 19:25:03 [kernel] [168311.801269] active_anon:139468 inactive_anon:57451 isolated_anon:0 Mar 06 19:25:03 [kernel] [168311.801269] active_file:375632 inactive_file:366012 isolated_file:0 Mar 06 19:25:03 [kernel] [168311.801269] unevictable:0 dirty:556 writeback:0 unstable:0 Mar 06 19:25:03 [kernel] [168311.801269] free:10993 slab_reclaimable:32206 slab_unreclaimable:6181 Mar 06 19:25:03 [kernel] [168311.801269] mapped:11149 shmem:256 pagetables:2768 bounce:0 Mar 06 19:25:03 [kernel] [168311.801269] free_cma:0 Mar 06 19:25:03 [kernel] [168311.801272] Node 0 DMA free:15904kB min:28kB low:32kB high:40kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15648kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes Mar 06 19:25:03 [kernel] [168311.801277] lowmem_reserve[]: 0 3247 4003 4003 Mar 06 19:25:03 [kernel] [168311.801285] lowmem_reserve[]: 0 0 756 756 Mar 06 19:25:03 [kernel] [168311.801292] lowmem_reserve[]: 0 0 0 0 Mar 06 19:25:03 [kernel] [168311.801295] Node 0 DMA: 0*4kB 0*8kB 0*16kB 1*32kB 2*64kB 1*128kB 1*256kB 0*512kB 1*1024kB 1*2048kB 3*4096kB = 15904kB Mar 06 19:25:03 [kernel] [168311.801302] Node 0 DMA32: 3586*4kB 1072*8kB 36*16kB 12*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 24520kB Mar 06 19:25:03 [kernel] [168311.801310] Node 0 Normal: 565*4kB 87*8kB 17*16kB 6*32kB 2*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 3548kB Mar 06 19:25:03 [kernel] [168311.801321] 742832 total pagecache pages Mar 06 19:25:03 [kernel] [168311.801322] 894 pages in swap cache Mar 06 19:25:03 [kernel] [168311.801324] Swap cache stats: add 36522, delete 35628, find 35755/36229 Mar 06 19:25:03 [kernel] [168311.801325] Free swap = 4081580kB Mar 06 19:25:03 [kernel] [168311.801326] Total swap = 4200992kB Mar 06 19:25:03 [kernel] [168311.813927] 1048560 pages RAM Mar 06 19:25:03 [kernel] [168311.813930] 36788 pages reserved Mar 06 19:25:03 [kernel] [168311.813931] 1640406 pages shared Mar 06 19:25:03 [kernel] [168311.813932] 423361 pages non-shared I tried upping the reserve to 65536 and removing the page compaction since I saw that in the stack trace and thought it might be a potential problem. At least it would remove one variable from the problem. The system ran longer but eventually through this error: Mar 14 18:55:03 [kernel] [563482.243067] DVBRead: page allocation failure: order:4, mode:0xc0d0 Mar 14 18:55:03 [kernel] [563482.243072] Pid: 25561, comm: DVBRead Tainted: G C 3.7.10-gentoo #4 Mar 14 18:55:03 [kernel] [563482.243074] Call Trace: Mar 14 18:55:04 [kernel] [563482.243081] [<ffffffff810e7e3b>] warn_alloc_failed+0xeb/0x130 Mar 14 18:55:04 [kernel] [563482.243084] [<ffffffff810eb421>] ? drain_local_pages+0x11/0x20 Mar 14 18:55:04 [kernel] [563482.243086] [<ffffffff810ead4a>] __alloc_pages_nodemask+0x62a/0x880 Mar 14 18:55:04 [kernel] [563482.243091] [<ffffffff8111e551>] alloc_pages_current+0xb1/0x120 Mar 14 18:55:04 [kernel] [563482.243093] [<ffffffff810e6fe9>] __get_free_pages+0x9/0x40 Mar 14 18:55:04 [kernel] [563482.243096] [<ffffffff811240aa>] kmalloc_order_trace+0x3a/0xb0 Mar 14 18:55:04 [kernel] [563482.243102] [<ffffffffa00c9483>] start_urb_transfer+0x83/0x1c0 [au0828] Mar 14 18:55:04 [kernel] [563482.243105] [<ffffffffa00c9698>] au0828_dvb_start_feed+0xd8/0x100 [au0828] Mar 14 18:55:04 [kernel] [563482.243109] [<ffffffff816054ee>] dmx_ts_feed_start_filtering+0x5e/0xf0 Mar 14 18:55:04 [kernel] [563482.243111] [<ffffffff816028bc>] dvb_dmxdev_start_feed.clone.0+0xcc/0x120 Mar 14 18:55:04 [kernel] [563482.243114] [<ffffffff8160342c>] dvb_dmxdev_filter_start+0x28c/0x3b0 Mar 14 18:55:04 [kernel] [563482.243116] [<ffffffff81603bca>] dvb_demux_do_ioctl+0x51a/0x6a0 Mar 14 18:55:04 [kernel] [563482.243118] [<ffffffff81601c44>] dvb_usercopy+0xa4/0x170 Mar 14 18:55:04 [kernel] [563482.243121] [<ffffffff816036b0>] ? dvb_demux_open+0x160/0x160 Mar 14 18:55:04 [kernel] [563482.243124] [<ffffffff81107e6b>] ? handle_mm_fault+0x13b/0x210 Mar 14 18:55:04 [kernel] [563482.243127] [<ffffffff81139274>] ? do_filp_open+0x44/0xa0 Mar 14 18:55:04 [kernel] [563482.243129] [<ffffffff816022c0>] dvb_demux_ioctl+0x10/0x20 Mar 14 18:55:04 [kernel] [563482.243132] [<ffffffff8113af56>] do_vfs_ioctl+0x96/0x4f0 Mar 14 18:55:04 [kernel] [563482.243135] [<ffffffff8132d494>] ? inode_has_perm.clone.25.clone.35+0x24/0x30 Mar 14 18:55:04 [kernel] [563482.243138] [<ffffffff8132fd80>] ? file_has_perm+0x90/0xa0 Mar 14 18:55:04 [kernel] [563482.243140] [<ffffffff8113b441>] sys_ioctl+0x91/0xa0 Mar 14 18:55:04 [kernel] [563482.243144] [<ffffffff818a4992>] system_call_fastpath+0x16/0x1b Mar 14 18:55:04 [kernel] [563482.243146] Mem-Info: Mar 14 18:55:04 [kernel] [563482.243147] Node 0 DMA per-cpu: Mar 14 18:55:04 [kernel] [563482.243149] CPU 0: hi: 0, btch: 1 usd: 0 Mar 14 18:55:04 [kernel] [563482.243151] CPU 1: hi: 0, btch: 1 usd: 0 Mar 14 18:55:04 [kernel] [563482.243152] CPU 2: hi: 0, btch: 1 usd: 0 Mar 14 18:55:04 [kernel] [563482.243154] CPU 3: hi: 0, btch: 1 usd: 0 Mar 14 18:55:04 [kernel] [563482.243155] Node 0 DMA32 per-cpu: Mar 14 18:55:04 [kernel] [563482.243157] CPU 0: hi: 186, btch: 31 usd: 0 Mar 14 18:55:04 [kernel] [563482.243159] CPU 1: hi: 186, btch: 31 usd: 0 Mar 14 18:55:04 [kernel] [563482.243160] CPU 2: hi: 186, btch: 31 usd: 0 Mar 14 18:55:04 [kernel] [563482.243162] CPU 3: hi: 186, btch: 31 usd: 154 Mar 14 18:55:04 [kernel] [563482.243163] Node 0 Normal per-cpu: Mar 14 18:55:04 [kernel] [563482.243165] CPU 0: hi: 186, btch: 31 usd: 0 Mar 14 18:55:04 [kernel] [563482.243166] CPU 1: hi: 186, btch: 31 usd: 0 Mar 14 18:55:04 [kernel] [563482.243167] CPU 2: hi: 186, btch: 31 usd: 0 Mar 14 18:55:04 [kernel] [563482.243169] CPU 3: hi: 186, btch: 31 usd: 20 Mar 14 18:55:04 [kernel] [563482.243172] active_anon:210949 inactive_anon:74267 isolated_anon:0 Mar 14 18:55:04 [kernel] [563482.243172] active_file:310728 inactive_file:310245 isolated_file:0 Mar 14 18:55:04 [kernel] [563482.243172] unevictable:0 dirty:122 writeback:0 unstable:0 Mar 14 18:55:04 [kernel] [563482.243172] free:44302 slab_reclaimable:32125 slab_unreclaimable:6209 Mar 14 18:55:04 [kernel] [563482.243172] mapped:11324 shmem:2395 pagetables:3151 bounce:0 Mar 14 18:55:04 [kernel] [563482.243172] free_cma:0 Mar 14 18:55:04 [kernel] [563482.243176] Node 0 DMA free:15904kB min:28kB low:32kB high:40kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15648kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes Mar 14 18:55:04 [kernel] [563482.243181] lowmem_reserve[]: 0 3247 4003 4003 Mar 14 18:55:04 [kernel] [563482.243184] Node 0 DMA32 free:151752kB min:6552kB low:8188kB high:9828kB active_anon:738896kB inactive_anon:187464kB active_file:1050596kB inactive_file:1050380kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:3325056kB mlocked:0kB dirty:124kB writeback:0kB mapped:28576kB shmem:8816kB slab_reclaimable:103772kB slab_unreclaimable:6500kB kernel_stack:736kB pagetables:5196kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:273 all_unreclaimable? no Mar 14 18:55:04 [kernel] [563482.243189] lowmem_reserve[]: 0 0 756 756 Mar 14 18:55:04 [kernel] [563482.243196] lowmem_reserve[]: 0 0 0 0 Mar 14 18:55:04 [kernel] [563482.243199] Node 0 DMA: 0*4kB 0*8kB 0*16kB 1*32kB 2*64kB 1*128kB 1*256kB 0*512kB 1*1024kB 1*2048kB 3*4096kB = 15904kB Mar 14 18:55:04 [kernel] [563482.243206] Node 0 DMA32: 3140*4kB 13397*8kB 1921*16kB 26*32kB 1*64kB 1*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 151752kB Mar 14 18:55:04 [kernel] [563482.243212] Node 0 Normal: 1498*4kB 397*8kB 10*16kB 1*32kB 1*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 9552kB Mar 14 18:55:04 [kernel] [563482.243219] 624263 total pagecache pages Mar 14 18:55:04 [kernel] [563482.243220] 825 pages in swap cache Mar 14 18:55:04 [kernel] [563482.243222] Swap cache stats: add 62462, delete 61637, find 126775/127278 Mar 14 18:55:04 [kernel] [563482.243223] Free swap = 3979468kB Mar 14 18:55:04 [kernel] [563482.243224] Total swap = 4200992kB Mar 14 18:55:04 [kernel] [563482.258396] 1048560 pages RAM Mar 14 18:55:04 [kernel] [563482.258399] 36781 pages reserved Mar 14 18:55:04 [kernel] [563482.258401] 1675869 pages shared Mar 14 18:55:04 [kernel] [563482.258402] 348212 pages non-shared This is really a problem as I don't want to have to keep rebooting the server to keep things running. I also get no error before hand so I am missing shows. Myth gets no indication other than a zero-byte file that anything is wrong. Can anyone help? Thanks! -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
