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Date: Thu, 25 Feb 2016 17:17:45 +0800 From: "Hillf Danton" <hillf.zj@...baba-inc.com> To: "'Sergey Senozhatsky'" <sergey.senozhatsky.work@...il.com>, "'Hugh Dickins'" <hughd@...gle.com> Cc: "'Michal Hocko'" <mhocko@...nel.org>, "'Andrew Morton'" <akpm@...ux-foundation.org>, "'Linus Torvalds'" <torvalds@...ux-foundation.org>, "'Johannes Weiner'" <hannes@...xchg.org>, "'Mel Gorman'" <mgorman@...e.de>, "'David Rientjes'" <rientjes@...gle.com>, "'Tetsuo Handa'" <penguin-kernel@...ove.sakura.ne.jp>, "'KAMEZAWA Hiroyuki'" <kamezawa.hiroyu@...fujitsu.com>, <linux-mm@...ck.org>, "'LKML'" <linux-kernel@...r.kernel.org>, "'Sergey Senozhatsky'" <sergey.senozhatsky@...il.com> Subject: Re: [PATCH 0/3] OOM detection rework v4 > > On (02/24/16 19:47), Hugh Dickins wrote: > > On Wed, 3 Feb 2016, Michal Hocko wrote: > > > Hi, > > > this thread went mostly quite. Are all the main concerns clarified? > > > Are there any new concerns? Are there any objections to targeting > > > this for the next merge window? > > > > Sorry to say at this late date, but I do have one concern: hopefully > > you can tweak something somewhere, or point me to some tunable that > > I can adjust (I've not studied the patches, sorry). > > > > This rework makes it impossible to run my tmpfs swapping loads: > > they're soon OOM-killed when they ran forever before, so swapping > > does not get the exercise on mmotm that it used to. (But I'm not > > so arrogant as to expect you to optimize for my load!) > > > > Maybe it's just that I'm using tmpfs, and there's code that's conscious > > of file and anon, but doesn't cope properly with the awkward shmem case. > > > > (Of course, tmpfs is and always has been a problem for OOM-killing, > > given that it takes up memory, but none is freed by killing processes: > > but although that is a tiresome problem, it's not what either of us is > > attacking here.) > > > > Taking many of the irrelevancies out of my load, here's something you > > could try, first on v4.5-rc5 and then on mmotm. > > > > FWIW, > > I have recently noticed the same change while testing zram-zsmalloc. next/mmots > are much more likely to OOM-kill apps now. and, unlike before, I don't see a lot > of shrinker->zsmalloc->zs_shrinker_scan() calls or swapouts, the kernel just > oom-kills Xorg, etc. > > the test script just creates a zram device (ext4 fs, lzo compression) and fills > it with some data, nothing special. > > > OOM example: > > [ 2392.663170] zram-test.sh invoked oom-killer: gfp_mask=0x27000c0(GFP_KERNEL_ACCOUNT|__GFP_NOTRACK), order=2, > oom_score_adj=0 > [ 2392.663175] CPU: 1 PID: 9517 Comm: zram-test.sh Not tainted 4.5.0-rc5-next-20160225-dbg-00009-g334f687-dirty #190 > [ 2392.663178] 0000000000000000 ffff88000b4efb88 ffffffff81237bac 0000000000000000 > [ 2392.663181] ffff88000b4efd28 ffff88000b4efbf8 ffffffff8113a077 ffff88000b4efba8 > [ 2392.663184] ffffffff81080e24 ffff88000b4efbc8 ffffffff8151584e ffffffff81a48460 > [ 2392.663187] Call Trace: > [ 2392.663191] [<ffffffff81237bac>] dump_stack+0x67/0x90 > [ 2392.663195] [<ffffffff8113a077>] dump_header.isra.5+0x54/0x351 > [ 2392.663197] [<ffffffff81080e24>] ? trace_hardirqs_on+0xd/0xf > [ 2392.663201] [<ffffffff8151584e>] ? _raw_spin_unlock_irqrestore+0x4b/0x60 > [ 2392.663204] [<ffffffff810f7ae7>] oom_kill_process+0x89/0x4ff > [ 2392.663206] [<ffffffff810f8319>] out_of_memory+0x36c/0x387 > [ 2392.663208] [<ffffffff810fc9c2>] __alloc_pages_nodemask+0x9ba/0xaa8 > [ 2392.663211] [<ffffffff810fcca8>] alloc_kmem_pages_node+0x1b/0x1d > [ 2392.663213] [<ffffffff81040216>] copy_process.part.9+0xfe/0x183f > [ 2392.663216] [<ffffffff81041aea>] _do_fork+0xbd/0x5f1 > [ 2392.663218] [<ffffffff81117402>] ? __might_fault+0x40/0x8d > [ 2392.663220] [<ffffffff81515f52>] ? entry_SYSCALL_64_fastpath+0x5/0xa8 > [ 2392.663223] [<ffffffff81001844>] ? do_syscall_64+0x18/0xe6 > [ 2392.663224] [<ffffffff810420a4>] SyS_clone+0x19/0x1b > [ 2392.663226] [<ffffffff81001886>] do_syscall_64+0x5a/0xe6 > [ 2392.663228] [<ffffffff8151601a>] entry_SYSCALL64_slow_path+0x25/0x25 > [ 2392.663230] Mem-Info: > [ 2392.663233] active_anon:87788 inactive_anon:69289 isolated_anon:0 > active_file:161111 inactive_file:320022 isolated_file:0 > unevictable:0 dirty:51 writeback:0 unstable:0 > slab_reclaimable:80335 slab_unreclaimable:5920 > mapped:30115 shmem:29235 pagetables:2589 bounce:0 > free:10949 free_pcp:189 free_cma:0 > [ 2392.663239] DMA free:15096kB min:28kB low:40kB high:52kB active_anon:0kB inactive_anon:0kB active_file:32kB > inactive_file:120kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15984kB managed:15900kB mlocked:0kB dirty:0kB > writeback:0kB mapped:136kB shmem:0kB slab_reclaimable:48kB slab_unreclaimable:92kB kernel_stack:0kB pagetables:0kB > unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no > [ 2392.663240] lowmem_reserve[]: 0 3031 3855 3855 > [ 2392.663247] DMA32 free:22876kB min:6232kB low:9332kB high:12432kB active_anon:316384kB inactive_anon:172076kB > active_file:512592kB inactive_file:1011992kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:3194880kB > managed:3107516kB mlocked:0kB dirty:148kB writeback:0kB mapped:93284kB shmem:90904kB slab_reclaimable:248836kB > slab_unreclaimable:14620kB kernel_stack:2208kB pagetables:7796kB unstable:0kB bounce:0kB free_pcp:628kB local_pcp:0kB > free_cma:0kB writeback_tmp:0kB pages_scanned:256 all_unreclaimable? no > [ 2392.663249] lowmem_reserve[]: 0 0 824 824 > [ 2392.663256] Normal free:5824kB min:1696kB low:2540kB high:3384kB active_anon:34768kB inactive_anon:105080kB > active_file:131820kB inactive_file:267720kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:917504kB > managed:844512kB mlocked:0kB dirty:56kB writeback:0kB mapped:27040kB shmem:26036kB slab_reclaimable:72456kB > slab_unreclaimable:8968kB kernel_stack:1296kB pagetables:2560kB unstable:0kB bounce:0kB free_pcp:128kB local_pcp:0kB > free_cma:0kB writeback_tmp:0kB pages_scanned:128 all_unreclaimable? no > [ 2392.663257] lowmem_reserve[]: 0 0 0 0 > [ 2392.663260] DMA: 4*4kB (M) 1*8kB (M) 4*16kB (ME) 1*32kB (M) 2*64kB (UE) 2*128kB (UE) 3*256kB (UME) 3*512kB (UME) > 2*1024kB (ME) 1*2048kB (E) 2*4096kB (M) = 15096kB > [ 2392.663284] DMA32: 5809*4kB (UME) 3*8kB (M) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = > 23260kB > [ 2392.663293] Normal: 1515*4kB (UME) 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = > 6060kB > [ 2392.663302] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB > [ 2392.663303] 510384 total pagecache pages > [ 2392.663305] 31 pages in swap cache > [ 2392.663306] Swap cache stats: add 113, delete 82, find 47/62 > [ 2392.663307] Free swap = 8388268kB > [ 2392.663308] Total swap = 8388604kB > [ 2392.663308] 1032092 pages RAM > [ 2392.663309] 0 pages HighMem/MovableOnly > [ 2392.663310] 40110 pages reserved > [ 2392.663311] 0 pages hwpoisoned > [ 2392.663312] [ pid ] uid tgid total_vm rss nr_ptes nr_pmds swapents oom_score_adj name > [ 2392.663316] [ 149] 0 149 9683 1612 20 3 4 0 systemd-journal > [ 2392.663319] [ 183] 0 183 8598 1103 19 3 18 -1000 systemd-udevd > [ 2392.663321] [ 285] 81 285 8183 911 20 3 0 -900 dbus-daemon > [ 2392.663323] [ 288] 0 288 3569 653 13 3 0 0 crond > [ 2392.663326] [ 289] 0 289 3855 649 12 3 0 0 systemd-logind > [ 2392.663328] [ 291] 0 291 22469 967 48 3 0 0 login > [ 2392.663330] [ 299] 1000 299 8493 1140 21 3 0 0 systemd > [ 2392.663332] [ 301] 1000 301 24226 416 47 3 20 0 (sd-pam) > [ 2392.663334] [ 306] 1000 306 4471 1126 14 3 0 0 bash > [ 2392.663336] [ 313] 1000 313 3717 739 13 3 0 0 startx > [ 2392.663339] [ 335] 1000 335 3981 236 14 3 0 0 xinit > [ 2392.663341] [ 336] 1000 336 47841 19104 94 3 0 0 Xorg > [ 2392.663343] [ 338] 1000 338 39714 4302 80 3 0 0 openbox > [ 2392.663345] [ 349] 1000 349 43472 3280 88 3 0 0 tint2 > [ 2392.663347] [ 355] 1000 355 34168 5710 57 3 0 0 urxvt > [ 2392.663349] [ 356] 1000 356 4533 1248 15 3 0 0 bash > [ 2392.663351] [ 435] 0 435 3691 2168 10 3 0 0 dhclient > [ 2392.663353] [ 451] 1000 451 4445 1111 14 4 0 0 bash > [ 2392.663355] [ 459] 1000 459 45577 6121 59 3 0 0 urxvt > [ 2392.663357] [ 460] 1000 460 4445 1070 15 3 0 0 bash > [ 2392.663359] [ 463] 1000 463 5207 728 16 3 0 0 tmux > [ 2392.663362] [ 465] 1000 465 6276 1299 18 3 0 0 tmux > [ 2392.663364] [ 466] 1000 466 4445 1113 14 3 0 0 bash > [ 2392.663366] [ 473] 1000 473 4445 1087 15 3 0 0 bash > [ 2392.663368] [ 476] 1000 476 5207 760 15 3 0 0 tmux > [ 2392.663370] [ 477] 1000 477 4445 1080 14 3 0 0 bash > [ 2392.663372] [ 484] 1000 484 4445 1076 14 3 0 0 bash > [ 2392.663374] [ 487] 1000 487 4445 1129 14 3 0 0 bash > [ 2392.663376] [ 490] 1000 490 4445 1115 14 3 0 0 bash > [ 2392.663378] [ 493] 1000 493 10206 1135 24 3 0 0 top > [ 2392.663380] [ 495] 1000 495 4445 1146 15 3 0 0 bash > [ 2392.663382] [ 502] 1000 502 3745 814 13 3 0 0 coretemp-sensor > [ 2392.663385] [ 536] 1000 536 27937 4429 53 3 0 0 urxvt > [ 2392.663387] [ 537] 1000 537 4445 1092 14 3 0 0 bash > [ 2392.663389] [ 543] 1000 543 29981 4138 53 3 0 0 urxvt > [ 2392.663391] [ 544] 1000 544 4445 1095 14 3 0 0 bash > [ 2392.663393] [ 549] 1000 549 29981 4132 53 3 0 0 urxvt > [ 2392.663395] [ 550] 1000 550 4445 1121 13 3 0 0 bash > [ 2392.663397] [ 555] 1000 555 45194 5728 62 3 0 0 urxvt > [ 2392.663399] [ 556] 1000 556 4445 1116 14 3 0 0 bash > [ 2392.663401] [ 561] 1000 561 30173 4317 51 3 0 0 urxvt > [ 2392.663403] [ 562] 1000 562 4445 1075 14 3 0 0 bash > [ 2392.663405] [ 586] 1000 586 57178 7499 65 4 0 0 urxvt > [ 2392.663408] [ 587] 1000 587 4478 1156 14 3 0 0 bash > [ 2392.663410] [ 593] 0 593 17836 1213 39 3 0 0 sudo > [ 2392.663412] [ 594] 0 594 136671 1794 188 4 0 0 journalctl > [ 2392.663414] [ 616] 1000 616 29981 4140 54 3 0 0 urxvt > [ 2392.663416] [ 617] 1000 617 4445 1122 14 3 0 0 bash > [ 2392.663418] [ 622] 1000 622 34169 8473 60 3 0 0 urxvt > [ 2392.663420] [ 623] 1000 623 4445 1116 14 3 0 0 bash > [ 2392.663422] [ 646] 1000 646 4445 1124 15 3 0 0 bash > [ 2392.663424] [ 668] 1000 668 4445 1090 15 3 0 0 bash > [ 2392.663426] [ 671] 1000 671 4445 1090 13 3 0 0 bash > [ 2392.663429] [ 674] 1000 674 4445 1083 13 3 0 0 bash > [ 2392.663431] [ 677] 1000 677 4445 1124 15 3 0 0 bash > [ 2392.663433] [ 720] 1000 720 3717 707 12 3 0 0 build99 > [ 2392.663435] [ 721] 1000 721 9107 1244 21 3 0 0 ssh > [ 2392.663437] [ 768] 0 768 17827 1292 40 3 0 0 sudo > [ 2392.663439] [ 771] 0 771 4640 622 14 3 0 0 screen > [ 2392.663441] [ 772] 0 772 4673 505 11 3 0 0 screen > [ 2392.663443] [ 775] 1000 775 4445 1120 14 3 0 0 bash > [ 2392.663445] [ 778] 1000 778 4445 1097 14 3 0 0 bash > [ 2392.663447] [ 781] 1000 781 4445 1088 13 3 0 0 bash > [ 2392.663449] [ 784] 1000 784 4445 1109 13 3 0 0 bash > [ 2392.663451] [ 808] 1000 808 341606 79367 532 5 0 0 firefox > [ 2392.663454] [ 845] 1000 845 8144 799 20 3 0 0 dbus-daemon > [ 2392.663456] [ 852] 1000 852 83828 1216 31 4 0 0 at-spi-bus-laun > [ 2392.663458] [ 9064] 1000 9064 4478 1154 13 3 0 0 bash > [ 2392.663460] [ 9068] 1000 9068 4478 1135 15 3 0 0 bash > [ 2392.663462] [ 9460] 1000 9460 11128 767 26 3 0 0 su > [ 2392.663464] [ 9463] 0 9463 4474 1188 14 4 0 0 bash > [ 2392.663482] [ 9517] 0 9517 3750 830 13 3 0 0 zram-test.sh > [ 2392.663485] [ 9917] 1000 9917 4444 1124 14 3 0 0 bash > [ 2392.663487] [13623] 1000 13623 1764 186 9 3 0 0 sleep > [ 2392.663489] Out of memory: Kill process 808 (firefox) score 25 or sacrifice child > [ 2392.663769] Killed process 808 (firefox) total-vm:1366424kB, anon-rss:235572kB, file-rss:82320kB, shmem-rss:8kB > > > [ 2400.152464] zram-test.sh invoked oom-killer: gfp_mask=0x27000c0(GFP_KERNEL_ACCOUNT|__GFP_NOTRACK), order=2, > oom_score_adj=0 > [ 2400.152470] CPU: 1 PID: 9517 Comm: zram-test.sh Not tainted 4.5.0-rc5-next-20160225-dbg-00009-g334f687-dirty #190 > [ 2400.152473] 0000000000000000 ffff88000b4efb88 ffffffff81237bac 0000000000000000 > [ 2400.152476] ffff88000b4efd28 ffff88000b4efbf8 ffffffff8113a077 ffff88000b4efba8 > [ 2400.152479] ffffffff81080e24 ffff88000b4efbc8 ffffffff8151584e ffffffff81a48460 > [ 2400.152481] Call Trace: > [ 2400.152487] [<ffffffff81237bac>] dump_stack+0x67/0x90 > [ 2400.152490] [<ffffffff8113a077>] dump_header.isra.5+0x54/0x351 > [ 2400.152493] [<ffffffff81080e24>] ? trace_hardirqs_on+0xd/0xf > [ 2400.152496] [<ffffffff8151584e>] ? _raw_spin_unlock_irqrestore+0x4b/0x60 > [ 2400.152500] [<ffffffff810f7ae7>] oom_kill_process+0x89/0x4ff > [ 2400.152502] [<ffffffff810f8319>] out_of_memory+0x36c/0x387 > [ 2400.152504] [<ffffffff810fc9c2>] __alloc_pages_nodemask+0x9ba/0xaa8 > [ 2400.152506] [<ffffffff810fcca8>] alloc_kmem_pages_node+0x1b/0x1d > [ 2400.152509] [<ffffffff81040216>] copy_process.part.9+0xfe/0x183f > [ 2400.152511] [<ffffffff81083178>] ? lock_acquire+0x11f/0x1c7 > [ 2400.152513] [<ffffffff81041aea>] _do_fork+0xbd/0x5f1 > [ 2400.152515] [<ffffffff81117402>] ? __might_fault+0x40/0x8d > [ 2400.152517] [<ffffffff81515f52>] ? entry_SYSCALL_64_fastpath+0x5/0xa8 > [ 2400.152520] [<ffffffff81001844>] ? do_syscall_64+0x18/0xe6 > [ 2400.152522] [<ffffffff810420a4>] SyS_clone+0x19/0x1b > [ 2400.152524] [<ffffffff81001886>] do_syscall_64+0x5a/0xe6 > [ 2400.152526] [<ffffffff8151601a>] entry_SYSCALL64_slow_path+0x25/0x25 > [ 2400.152527] Mem-Info: > [ 2400.152531] active_anon:37648 inactive_anon:59709 isolated_anon:0 > active_file:160072 inactive_file:275086 isolated_file:0 > unevictable:0 dirty:49 writeback:0 unstable:0 > slab_reclaimable:54096 slab_unreclaimable:5978 > mapped:13650 shmem:29234 pagetables:2058 bounce:0 > free:13017 free_pcp:134 free_cma:0 > [ 2400.152536] DMA free:15096kB min:28kB low:40kB high:52kB active_anon:0kB inactive_anon:0kB active_file:32kB > inactive_file:120kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15984kB managed:15900kB mlocked:0kB dirty:0kB > writeback:0kB mapped:136kB shmem:0kB slab_reclaimable:48kB slab_unreclaimable:92kB kernel_stack:0kB pagetables:0kB > unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no > [ 2400.152537] lowmem_reserve[]: 0 3031 3855 3855 > [ 2400.152545] DMA32 free:31504kB min:6232kB low:9332kB high:12432kB active_anon:129548kB inactive_anon:172076kB > active_file:508480kB inactive_file:872492kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:3194880kB > managed:3107516kB mlocked:0kB dirty:132kB writeback:0kB mapped:42296kB shmem:90900kB slab_reclaimable:165548kB > slab_unreclaimable:14964kB kernel_stack:1712kB pagetables:6176kB unstable:0kB bounce:0kB free_pcp:428kB local_pcp:0kB > free_cma:0kB writeback_tmp:0kB pages_scanned:424 all_unreclaimable? no > [ 2400.152546] lowmem_reserve[]: 0 0 824 824 > [ 2400.152553] Normal free:5468kB min:1696kB low:2540kB high:3384kB active_anon:21044kB inactive_anon:66760kB > active_file:131776kB inactive_file:227732kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:917504kB > managed:844512kB mlocked:0kB dirty:64kB writeback:0kB mapped:12168kB shmem:26036kB slab_reclaimable:50788kB > slab_unreclaimable:8856kB kernel_stack:912kB pagetables:2056kB unstable:0kB bounce:0kB free_pcp:108kB local_pcp:0kB > free_cma:0kB writeback_tmp:0kB pages_scanned:160 all_unreclaimable? no > [ 2400.152555] lowmem_reserve[]: 0 0 0 0 > [ 2400.152558] DMA: 4*4kB (M) 1*8kB (M) 4*16kB (ME) 1*32kB (M) 2*64kB (UE) 2*128kB (UE) 3*256kB (UME) 3*512kB (UME) > 2*1024kB (ME) 1*2048kB (E) 2*4096kB (M) = 15096kB > [ 2400.152573] DMA32: 7835*4kB (UME) 55*8kB (M) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = > 31780kB > [ 2400.152582] Normal: 1383*4kB (UM) 22*8kB (UM) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = > 5708kB > [ 2400.152592] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB > [ 2400.152593] 464295 total pagecache pages > [ 2400.152594] 31 pages in swap cache > [ 2400.152595] Swap cache stats: add 113, delete 82, find 47/62 > [ 2400.152596] Free swap = 8388268kB > [ 2400.152597] Total swap = 8388604kB > [ 2400.152598] 1032092 pages RAM > [ 2400.152599] 0 pages HighMem/MovableOnly > [ 2400.152600] 40110 pages reserved > [ 2400.152600] 0 pages hwpoisoned > [ 2400.152601] [ pid ] uid tgid total_vm rss nr_ptes nr_pmds swapents oom_score_adj name > [ 2400.152605] [ 149] 0 149 9683 1990 20 3 4 0 systemd-journal > [ 2400.152608] [ 183] 0 183 8598 1103 19 3 18 -1000 systemd-udevd > [ 2400.152610] [ 285] 81 285 8183 911 20 3 0 -900 dbus-daemon > [ 2400.152613] [ 288] 0 288 3569 653 13 3 0 0 crond > [ 2400.152615] [ 289] 0 289 3855 649 12 3 0 0 systemd-logind > [ 2400.152617] [ 291] 0 291 22469 967 48 3 0 0 login > [ 2400.152619] [ 299] 1000 299 8493 1140 21 3 0 0 systemd > [ 2400.152621] [ 301] 1000 301 24226 416 47 3 20 0 (sd-pam) > [ 2400.152623] [ 306] 1000 306 4471 1126 14 3 0 0 bash > [ 2400.152626] [ 313] 1000 313 3717 739 13 3 0 0 startx > [ 2400.152628] [ 335] 1000 335 3981 236 14 3 0 0 xinit > [ 2400.152630] [ 336] 1000 336 47713 19103 93 3 0 0 Xorg > [ 2400.152632] [ 338] 1000 338 39714 4302 80 3 0 0 openbox > [ 2400.152634] [ 349] 1000 349 43472 3280 88 3 0 0 tint2 > [ 2400.152636] [ 355] 1000 355 34168 5754 58 3 0 0 urxvt > [ 2400.152638] [ 356] 1000 356 4533 1248 15 3 0 0 bash > [ 2400.152640] [ 435] 0 435 3691 2168 10 3 0 0 dhclient > [ 2400.152642] [ 451] 1000 451 4445 1111 14 4 0 0 bash > [ 2400.152644] [ 459] 1000 459 45577 6121 59 3 0 0 urxvt > [ 2400.152646] [ 460] 1000 460 4445 1070 15 3 0 0 bash > [ 2400.152648] [ 463] 1000 463 5207 728 16 3 0 0 tmux > [ 2400.152650] [ 465] 1000 465 6276 1299 18 3 0 0 tmux > [ 2400.152653] [ 466] 1000 466 4445 1113 14 3 0 0 bash > [ 2400.152655] [ 473] 1000 473 4445 1087 15 3 0 0 bash > [ 2400.152657] [ 476] 1000 476 5207 760 15 3 0 0 tmux > [ 2400.152659] [ 477] 1000 477 4445 1080 14 3 0 0 bash > [ 2400.152661] [ 484] 1000 484 4445 1076 14 3 0 0 bash > [ 2400.152663] [ 487] 1000 487 4445 1129 14 3 0 0 bash > [ 2400.152665] [ 490] 1000 490 4445 1115 14 3 0 0 bash > [ 2400.152667] [ 493] 1000 493 10206 1135 24 3 0 0 top > [ 2400.152669] [ 495] 1000 495 4445 1146 15 3 0 0 bash > [ 2400.152671] [ 502] 1000 502 3745 814 13 3 0 0 coretemp-sensor > [ 2400.152673] [ 536] 1000 536 27937 4429 53 3 0 0 urxvt > [ 2400.152675] [ 537] 1000 537 4445 1092 14 3 0 0 bash > [ 2400.152677] [ 543] 1000 543 29981 4138 53 3 0 0 urxvt > [ 2400.152680] [ 544] 1000 544 4445 1095 14 3 0 0 bash > [ 2400.152682] [ 549] 1000 549 29981 4132 53 3 0 0 urxvt > [ 2400.152684] [ 550] 1000 550 4445 1121 13 3 0 0 bash > [ 2400.152686] [ 555] 1000 555 45194 5728 62 3 0 0 urxvt > [ 2400.152688] [ 556] 1000 556 4445 1116 14 3 0 0 bash > [ 2400.152690] [ 561] 1000 561 30173 4317 51 3 0 0 urxvt > [ 2400.152692] [ 562] 1000 562 4445 1075 14 3 0 0 bash > [ 2400.152694] [ 586] 1000 586 57178 7499 65 4 0 0 urxvt > [ 2400.152696] [ 587] 1000 587 4478 1156 14 3 0 0 bash > [ 2400.152698] [ 593] 0 593 17836 1213 39 3 0 0 sudo > [ 2400.152700] [ 594] 0 594 136671 1794 188 4 0 0 journalctl > [ 2400.152702] [ 616] 1000 616 29981 4140 54 3 0 0 urxvt > [ 2400.152705] [ 617] 1000 617 4445 1122 14 3 0 0 bash > [ 2400.152707] [ 622] 1000 622 34169 8473 60 3 0 0 urxvt > [ 2400.152709] [ 623] 1000 623 4445 1116 14 3 0 0 bash > [ 2400.152711] [ 646] 1000 646 4445 1124 15 3 0 0 bash > [ 2400.152713] [ 668] 1000 668 4445 1090 15 3 0 0 bash > [ 2400.152715] [ 671] 1000 671 4445 1090 13 3 0 0 bash > [ 2400.152717] [ 674] 1000 674 4445 1083 13 3 0 0 bash > [ 2400.152719] [ 677] 1000 677 4445 1124 15 3 0 0 bash > [ 2400.152721] [ 720] 1000 720 3717 707 12 3 0 0 build99 > [ 2400.152723] [ 721] 1000 721 9107 1244 21 3 0 0 ssh > [ 2400.152725] [ 768] 0 768 17827 1292 40 3 0 0 sudo > [ 2400.152727] [ 771] 0 771 4640 622 14 3 0 0 screen > [ 2400.152729] [ 772] 0 772 4673 505 11 3 0 0 screen > [ 2400.152731] [ 775] 1000 775 4445 1120 14 3 0 0 bash > [ 2400.152733] [ 778] 1000 778 4445 1097 14 3 0 0 bash > [ 2400.152735] [ 781] 1000 781 4445 1088 13 3 0 0 bash > [ 2400.152737] [ 784] 1000 784 4445 1109 13 3 0 0 bash > [ 2400.152740] [ 845] 1000 845 8144 799 20 3 0 0 dbus-daemon > [ 2400.152742] [ 852] 1000 852 83828 1216 31 4 0 0 at-spi-bus-laun > [ 2400.152744] [ 9064] 1000 9064 4478 1154 13 3 0 0 bash > [ 2400.152746] [ 9068] 1000 9068 4478 1135 15 3 0 0 bash > [ 2400.152748] [ 9460] 1000 9460 11128 767 26 3 0 0 su > [ 2400.152750] [ 9463] 0 9463 4474 1188 14 4 0 0 bash > [ 2400.152752] [ 9517] 0 9517 3783 832 13 3 0 0 zram-test.sh > [ 2400.152754] [ 9917] 1000 9917 4444 1124 14 3 0 0 bash > [ 2400.152757] [14052] 1000 14052 1764 162 9 3 0 0 sleep > [ 2400.152758] Out of memory: Kill process 336 (Xorg) score 6 or sacrifice child > [ 2400.152767] Killed process 336 (Xorg) total-vm:190852kB, anon-rss:58728kB, file-rss:17684kB, shmem-rss:0kB > [ 2400.161723] oom_reaper: reaped process 336 (Xorg), now anon-rss:0kB, file-rss:0kB, shmem-rss:0lB > > > > > $ free > total used free shared buff/cache available > Mem: 3967928 1563132 310548 116936 2094248 2207584 > Swap: 8388604 332 8388272 > Hi Sergey Thanks for your info. Can you please schedule a run for the diff attached, in which non-expensive allocators are allowed to burn more CPU cycles. thanks Hillf --- a/mm/page_alloc.c Thu Feb 25 15:43:18 2016 +++ b/mm/page_alloc.c Thu Feb 25 16:46:05 2016 @@ -3113,6 +3113,8 @@ should_reclaim_retry(gfp_t gfp_mask, uns struct zone *zone; struct zoneref *z; + if (order <= PAGE_ALLOC_COSTLY_ORDER) + no_progress_loops /= 2; /* * Make sure we converge to OOM if we cannot make any progress * several times in the row. --
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