* Trying to understand OOM killer
@ 2017-02-12 13:47 Paul Menzel
2017-02-19 15:00 ` Michal Hocko
0 siblings, 1 reply; 2+ messages in thread
From: Paul Menzel @ 2017-02-12 13:47 UTC (permalink / raw)
To: linux-mm; +Cc: linux-kernel
[-- Attachment #1: Type: text/plain, Size: 19671 bytes --]
Dear Linux folks,
since some time, at Linux 4.8, 4.9, and 4.10-rc6, the OOM kicks in on a
8 GB machine.
```
Feb 12 08:21:50 asrocke350m1 kernel: updatedb.mlocat invoked oom-killer: gfp_mask=0x16040d0(GFP_TEMPORARY|__GFP_COMP|__GFP_NOTRACK), nodemask=
Feb 12 08:21:50 asrocke350m1 kernel: updatedb.mlocat cpuset=/ mems_allowed=0
Feb 12 08:21:50 asrocke350m1 kernel: CPU: 1 PID: 2314 Comm: updatedb.mlocat Tainted: G C 4.10.0-rc6-686-pae #1 Debian 4.10~rc6-1~
Feb 12 08:21:50 asrocke350m1 kernel: Hardware name: ASROCK E350M1/E350M1, BIOS 4.5-964-gd96669e9db 02/11/2017
Feb 12 08:21:51 asrocke350m1 kernel: Call Trace:
Feb 12 08:21:51 asrocke350m1 kernel: ? dump_stack+0x55/0x73
Feb 12 08:21:51 asrocke350m1 kernel: ? dump_header+0x64/0x1ab
Feb 12 08:21:52 asrocke350m1 kernel: ? ___ratelimit+0x9f/0x100
Feb 12 08:21:52 asrocke350m1 kernel: ? oom_kill_process+0x221/0x3e0
Feb 12 08:21:52 asrocke350m1 kernel: ? has_capability_noaudit+0x1a/0x30
Feb 12 08:21:52 asrocke350m1 kernel: ? oom_badness.part.13+0xd7/0x150
Feb 12 08:21:52 asrocke350m1 kernel: ? out_of_memory+0xe4/0x290
Feb 12 08:21:52 asrocke350m1 kernel: ? __alloc_pages_nodemask+0xab8/0xbc0
Feb 12 08:21:52 asrocke350m1 kernel: ? xfs_init_local_fork+0x8a/0xd0 [xfs]
Feb 12 08:21:52 asrocke350m1 kernel: ? cache_grow_begin.isra.60+0x75/0x510
Feb 12 08:21:52 asrocke350m1 kernel: ? xfs_buf_rele+0x43/0x2e0 [xfs]
Feb 12 08:21:52 asrocke350m1 kernel: ? kmem_cache_alloc+0x1fa/0x530
Feb 12 08:21:52 asrocke350m1 kernel: ? __d_alloc+0x23/0x180
Feb 12 08:21:52 asrocke350m1 kernel: ? d_alloc+0x18/0x80
Feb 12 08:21:52 asrocke350m1 kernel: ? d_alloc_parallel+0x47/0x450
Feb 12 08:21:52 asrocke350m1 kernel: ? d_splice_alias+0x10d/0x3a0
Feb 12 08:21:53 asrocke350m1 kernel: ? lockref_get_not_dead+0x8/0x40
Feb 12 08:21:53 asrocke350m1 kernel: ? unlazy_walk+0xf9/0x1a0
Feb 12 08:21:53 asrocke350m1 kernel: ? lookup_slow+0x5e/0x140
Feb 12 08:21:53 asrocke350m1 kernel: ? walk_component+0x1b4/0x350
Feb 12 08:21:53 asrocke350m1 kernel: ? path_lookupat+0x49/0xe0
Feb 12 08:21:53 asrocke350m1 kernel: ? filename_lookup+0x99/0x190
Feb 12 08:21:53 asrocke350m1 kernel: ? __check_object_size+0x9e/0x11c
Feb 12 08:21:53 asrocke350m1 kernel: ? strncpy_from_user+0x39/0x140
Feb 12 08:21:53 asrocke350m1 kernel: ? getname_flags+0x55/0x1a0
Feb 12 08:21:53 asrocke350m1 kernel: ? vfs_fstatat+0x60/0xb0
Feb 12 08:21:53 asrocke350m1 kernel: ? SyS_lstat64+0x2d/0x50
Feb 12 08:21:53 asrocke350m1 kernel: ? sys_sync+0x9d/0xa0
Feb 12 08:21:53 asrocke350m1 kernel: ? SyS_poll+0x6b/0x110
Feb 12 08:21:53 asrocke350m1 kernel: ? do_fast_syscall_32+0x8a/0x150
Feb 12 08:21:53 asrocke350m1 kernel: ? entry_SYSENTER_32+0x4e/0x7c
Feb 12 08:21:53 asrocke350m1 kernel: Mem-Info:
Feb 12 08:21:53 asrocke350m1 kernel: active_anon:119893 inactive_anon:17678 isolated_anon:0
active_file:31461 inactive_file:219091 isolated_file:0
unevictable:21 dirty:0 writeback:0 unstable:0
slab_reclaimable:127609 slab_unreclaimable:9519
mapped:63113 shmem:6177 pagetables:1601 bounce:0
free:1381579 free_pcp:583 free_cma:0
Feb 12 08:21:53 asrocke350m1 kernel: Node 0 active_anon:479572kB inactive_anon:70712kB active_file:125844kB inactive_file:876364kB unevictable
Feb 12 08:21:53 asrocke350m1 kernel: DMA free:3840kB min:788kB low:984kB high:1180kB active_anon:0kB inactive_anon:0kB active_file:0kB inactiv
Feb 12 08:21:53 asrocke350m1 kernel: lowmem_reserve[]: 0 763 7663 7663
Feb 12 08:21:53 asrocke350m1 kernel: Normal free:38764kB min:38828kB low:48532kB high:58236kB active_anon:0kB inactive_anon:0kB active_file:16
Feb 12 08:21:53 asrocke350m1 kernel: lowmem_reserve[]: 0 0 55201 55201
Feb 12 08:21:53 asrocke350m1 kernel: HighMem free:5483712kB min:512kB low:88240kB high:175968kB active_anon:479572kB inactive_anon:70712kB act
Feb 12 08:21:54 asrocke350m1 kernel: lowmem_reserve[]: 0 0 0 0
Feb 12 08:21:54 asrocke350m1 kernel: DMA: 0*4kB 42*8kB (UE) 69*16kB (UE) 7*32kB (UE) 10*64kB (UE) 2*128kB (U) 1*256kB (U) 2*512kB (U) 0*1024kB
Feb 12 08:21:54 asrocke350m1 kernel: Normal: 17*4kB (UME) 583*8kB (UME) 1983*16kB (UE) 72*32kB (ME) 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*
Feb 12 08:21:54 asrocke350m1 kernel: HighMem: 2156*4kB (UM) 1334*8kB (UM) 2760*16kB (UM) 2087*32kB (UM) 1274*64kB (UM) 491*128kB (UM) 234*256k
Feb 12 08:21:54 asrocke350m1 kernel: Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
Feb 12 08:21:54 asrocke350m1 kernel: 256720 total pagecache pages
Feb 12 08:21:54 asrocke350m1 kernel: 0 pages in swap cache
Feb 12 08:21:54 asrocke350m1 kernel: Swap cache stats: add 0, delete 0, find 0/0
Feb 12 08:21:54 asrocke350m1 kernel: Free swap = 4194300kB
Feb 12 08:21:54 asrocke350m1 kernel: Total swap = 4194300kB
Feb 12 08:21:54 asrocke350m1 kernel: 1994197 pages RAM
Feb 12 08:21:54 asrocke350m1 kernel: 1766457 pages HighMem/MovableOnly
Feb 12 08:21:54 asrocke350m1 kernel: 22689 pages reserved
Feb 12 08:21:54 asrocke350m1 kernel: 0 pages hwpoisoned
Feb 12 08:21:54 asrocke350m1 kernel: [ pid ] uid tgid total_vm rss nr_ptes nr_pmds swapents oom_score_adj name
Feb 12 08:21:54 asrocke350m1 kernel: [ 388] 0 388 18525 8958 32 3 0 0 systemd-journal
Feb 12 08:21:54 asrocke350m1 kernel: [ 416] 0 416 5467 391 7 3 0 0 lvmetad
Feb 12 08:21:54 asrocke350m1 kernel: [ 429] 0 429 4034 1047 8 3 0 -1000 systemd-udevd
Feb 12 08:21:54 asrocke350m1 kernel: [ 597] 0 597 835 573 5 3 0 0 mdadm
Feb 12 08:21:54 asrocke350m1 kernel: [ 825] 134 825 4244 992 9 3 0 0 systemd-timesyn
Feb 12 08:21:54 asrocke350m1 kernel: [ 835] 0 835 1428 935 6 3 0 0 smartd
Feb 12 08:21:54 asrocke350m1 kernel: [ 836] 0 836 1313 719 6 3 0 0 cron
Feb 12 08:21:54 asrocke350m1 kernel: [ 838] 0 838 1038 564 6 3 0 0 anacron
Feb 12 08:21:54 asrocke350m1 kernel: [ 840] 0 840 5883 751 10 3 0 0 rsyslogd
Feb 12 08:21:54 asrocke350m1 kernel: [ 846] 0 846 1108 410 7 3 0 0 irexec
Feb 12 08:21:54 asrocke350m1 kernel: [ 851] 0 851 9931 1654 13 3 0 0 accounts-daemon
Feb 12 08:21:54 asrocke350m1 kernel: [ 853] 104 853 1699 1110 8 3 0 -900 dbus-daemon
Feb 12 08:21:54 asrocke350m1 kernel: [ 867] 105 867 1563 814 6 3 0 0 avahi-daemon
Feb 12 08:21:54 asrocke350m1 kernel: [ 868] 0 868 23658 4150 26 3 0 0 NetworkManager
Feb 12 08:21:54 asrocke350m1 kernel: [ 869] 0 869 1128 420 6 3 0 0 lircmd
Feb 12 08:21:54 asrocke350m1 kernel: [ 870] 0 870 889 568 5 3 0 0 atd
Feb 12 08:21:54 asrocke350m1 kernel: [ 878] 0 878 1853 1147 7 3 0 0 systemd-logind
Feb 12 08:21:54 asrocke350m1 kernel: [ 879] 0 879 10954 2159 16 3 0 0 ModemManager
Feb 12 08:21:54 asrocke350m1 kernel: [ 887] 0 887 558 18 5 3 0 0 minissdpd
Feb 12 08:21:54 asrocke350m1 kernel: [ 893] 105 893 1563 73 6 3 0 0 avahi-daemon
Feb 12 08:21:54 asrocke350m1 kernel: [ 895] 129 895 11545 3234 17 3 0 0 colord
Feb 12 08:21:54 asrocke350m1 kernel: [ 904] 0 904 9909 1981 15 3 0 0 polkitd
Feb 12 08:21:54 asrocke350m1 kernel: [ 923] 0 923 94106 6465 51 3 0 0 libvirtd
Feb 12 08:21:54 asrocke350m1 kernel: [ 926] 0 926 2616 1283 8 3 0 -1000 sshd
Feb 12 08:21:54 asrocke350m1 kernel: [ 961] 0 961 10354 1870 14 3 0 0 gdm3
Feb 12 08:21:54 asrocke350m1 kernel: [ 973] 0 973 7965 1994 13 3 0 0 gdm-session-wor
Feb 12 08:21:54 asrocke350m1 kernel: [ 1192] 0 1192 1207 758 7 3 0 0 lircd
Feb 12 08:21:54 asrocke350m1 kernel: [ 1195] 0 1195 1129 431 6 3 0 0 lircd-uinput
Feb 12 08:21:54 asrocke350m1 kernel: [ 1252] 122 1252 8304 7454 21 3 0 0 tor
Feb 12 08:21:55 asrocke350m1 kernel: [ 1255] 101 1255 2813 702 8 3 0 0 exim4
Feb 12 08:21:55 asrocke350m1 kernel: [ 1278] 0 1278 2856 1758 9 3 0 0 wpa_supplicant
Feb 12 08:21:55 asrocke350m1 kernel: [ 1280] 0 1280 2117 1352 8 3 0 0 apache2
Feb 12 08:21:55 asrocke350m1 kernel: [ 1288] 33 1288 811 39 5 3 0 0 htcacheclean
Feb 12 08:21:55 asrocke350m1 kernel: [ 1289] 130 1289 2369 1407 8 3 0 0 systemd
Feb 12 08:21:55 asrocke350m1 kernel: [ 1290] 130 1290 2745 392 9 3 0 0 (sd-pam)
Feb 12 08:21:55 asrocke350m1 kernel: [ 1292] 130 1292 6945 1251 10 3 0 0 gdm-wayland-ses
Feb 12 08:21:55 asrocke350m1 kernel: [ 1294] 130 1294 1590 1002 7 3 0 0 dbus-daemon
Feb 12 08:21:55 asrocke350m1 kernel: [ 1311] 130 1311 19475 3265 23 3 0 0 gnome-session-b
Feb 12 08:21:55 asrocke350m1 kernel: [ 1374] 130 1374 208428 26571 111 3 0 0 gnome-shell
Feb 12 08:21:55 asrocke350m1 kernel: [ 1379] 0 1379 21121 2547 18 3 0 0 upowerd
Feb 12 08:21:55 asrocke350m1 kernel: [ 1405] 130 1405 28029 9140 46 3 0 0 Xwayland
Feb 12 08:21:55 asrocke350m1 kernel: [ 1411] 130 1411 11342 1415 12 3 0 0 at-spi-bus-laun
Feb 12 08:21:55 asrocke350m1 kernel: [ 1416] 130 1416 1564 873 7 3 0 0 dbus-daemon
Feb 12 08:21:55 asrocke350m1 kernel: [ 1418] 130 1418 7592 1544 11 3 0 0 at-spi2-registr
Feb 12 08:21:55 asrocke350m1 kernel: [ 1425] 130 1425 222202 2441 21 3 0 0 pulseaudio
Feb 12 08:21:55 asrocke350m1 kernel: [ 1440] 0 1440 11899 2862 18 3 0 0 packagekitd
Feb 12 08:21:55 asrocke350m1 kernel: [ 1441] 130 1441 115081 12067 68 3 0 0 gnome-settings-
Feb 12 08:21:55 asrocke350m1 kernel: [ 1480] 0 1480 7986 2033 14 3 0 0 gdm-session-wor
Feb 12 08:21:55 asrocke350m1 kernel: [ 1486] 1000 1486 2369 1371 8 3 0 0 systemd
Feb 12 08:21:55 asrocke350m1 kernel: [ 1487] 1000 1487 7355 402 12 3 0 0 (sd-pam)
Feb 12 08:21:55 asrocke350m1 kernel: [ 1491] 1000 1491 10023 1922 13 3 0 0 gnome-keyring-d
Feb 12 08:21:55 asrocke350m1 kernel: [ 1494] 1000 1494 7424 1403 11 3 0 0 gdm-x-session
Feb 12 08:21:55 asrocke350m1 kernel: [ 1496] 1000 1496 33920 14489 59 3 0 0 Xorg
Feb 12 08:21:55 asrocke350m1 kernel: [ 1500] 1000 1500 1589 997 7 3 0 0 dbus-daemon
Feb 12 08:21:55 asrocke350m1 kernel: [ 1505] 1000 1505 14890 7121 24 3 0 0 awesome
Feb 12 08:21:55 asrocke350m1 kernel: [ 1534] 1000 1534 4310 1673 10 3 0 0 arbtt-capture
Feb 12 08:21:55 asrocke350m1 kernel: [ 1628] 1000 1628 1180 54 6 3 0 0 ssh-agent
Feb 12 08:21:55 asrocke350m1 kernel: [ 1635] 1000 1635 11361 1459 12 3 0 0 at-spi-bus-laun
Feb 12 08:21:55 asrocke350m1 kernel: [ 1640] 1000 1640 1564 873 6 3 0 0 dbus-daemon
Feb 12 08:21:55 asrocke350m1 kernel: [ 1644] 1000 1644 7594 1294 13 3 0 0 at-spi2-registr
Feb 12 08:21:55 asrocke350m1 kernel: [ 1646] 1000 1646 21040 8672 36 3 0 0 gnome-terminal-
Feb 12 08:21:55 asrocke350m1 kernel: [ 1653] 1000 1653 10027 1331 15 3 0 0 gvfsd
Feb 12 08:21:55 asrocke350m1 kernel: [ 1658] 1000 1658 13148 1359 15 3 0 0 gvfsd-fuse
Feb 12 08:21:55 asrocke350m1 kernel: [ 1672] 1000 1672 1773 1222 7 3 0 0 bash
Feb 12 08:21:55 asrocke350m1 kernel: [ 1681] 1000 1681 15803 13913 36 3 0 0 gdb
Feb 12 08:21:55 asrocke350m1 kernel: [ 1689] 1000 1689 1759 1205 6 3 0 0 bash
Feb 12 08:21:55 asrocke350m1 kernel: [ 1700] 1000 1700 1759 1211 7 3 0 0 bash
Feb 12 08:21:55 asrocke350m1 kernel: [ 1713] 1000 1713 19912 7108 29 3 0 0 nm-applet
Feb 12 08:21:55 asrocke350m1 kernel: [ 1724] 1000 1724 10075 1350 12 3 0 0 gnome-keyring-d
Feb 12 08:21:55 asrocke350m1 kernel: [ 1730] 0 1730 2026 927 7 3 0 0 dhclient
Feb 12 08:21:55 asrocke350m1 kernel: [ 1925] 0 1925 555 321 5 3 0 0 run-parts
Feb 12 08:21:56 asrocke350m1 kernel: [ 2208] 33 2208 2123 1124 8 3 0 0 apache2
Feb 12 08:21:56 asrocke350m1 kernel: [ 2209] 33 2209 2123 795 7 3 0 0 apache2
Feb 12 08:21:56 asrocke350m1 kernel: [ 2210] 33 2210 2123 795 7 3 0 0 apache2
Feb 12 08:21:57 asrocke350m1 kernel: [ 2211] 33 2211 2123 795 7 3 0 0 apache2
Feb 12 08:21:58 asrocke350m1 kernel: [ 2212] 33 2212 2123 795 7 3 0 0 apache2
Feb 12 08:21:59 asrocke350m1 kernel: [ 2213] 33 2213 2123 795 7 3 0 0 apache2
Feb 12 08:21:59 asrocke350m1 kernel: [ 2227] 0 2227 3831 1969 12 3 0 0 cupsd
Feb 12 08:21:59 asrocke350m1 kernel: [ 2308] 0 2308 1307 712 6 3 0 0 mlocate
Feb 12 08:22:00 asrocke350m1 kernel: [ 2313] 0 2313 1008 160 6 3 0 0 flock
Feb 12 08:22:01 asrocke350m1 kernel: [ 2314] 0 2314 1183 726 7 3 0 0 updatedb.mlocat
Feb 12 08:22:01 asrocke350m1 kernel: [ 2780] 1000 2780 2559 1409 8 3 0 0 ssh
Feb 12 08:22:01 asrocke350m1 kernel: [ 2789] 1000 2789 1773 1264 7 3 0 0 bash
Feb 12 08:22:01 asrocke350m1 kernel: [ 2798] 1000 2798 208137 83634 291 3 0 0 firefox-esr
Feb 12 08:22:01 asrocke350m1 kernel: [ 2807] 1000 2807 1760 1253 7 3 0 0 bash
Feb 12 08:22:01 asrocke350m1 kernel: [ 2833] 1000 2833 3332 1638 11 3 0 0 gconfd-2
Feb 12 08:22:01 asrocke350m1 kernel: [ 2883] 1000 2883 2944 2168 8 3 0 0 vim
Feb 12 08:22:02 asrocke350m1 kernel: [ 2895] 1000 2895 1784 1327 7 3 0 0 bash
Feb 12 08:22:03 asrocke350m1 kernel: [ 4298] 1000 4298 3444 2800 10 3 0 0 debcheckout
Feb 12 08:22:03 asrocke350m1 kernel: [ 4302] 1000 4302 1898 998 7 3 0 0 git
Feb 12 08:22:03 asrocke350m1 kernel: [ 4303] 1000 4303 11054 6508 22 3 0 0 git-remote-http
Feb 12 08:22:04 asrocke350m1 kernel: [ 4306] 1000 4306 4232 983 8 3 0 0 git
Feb 12 08:22:04 asrocke350m1 kernel: [ 4309] 1000 4309 2621 1522 8 3 0 0 git
Feb 12 08:22:04 asrocke350m1 kernel: [ 4322] 0 4322 1408 829 6 3 0 0 inetd
Feb 12 08:22:05 asrocke350m1 kernel: Out of memory: Kill process 2798 (firefox-esr) score 27 or sacrifice child
Feb 12 08:22:05 asrocke350m1 kernel: Killed process 2798 (firefox-esr) total-vm:832548kB, anon-rss:248168kB, file-rss:86300kB, shmem-rss:68kB
Feb 12 08:22:06 asrocke350m1 kernel: perf: interrupt took too long (2505 > 2500), lowering kernel.perf_event_max_sample_rate to 79750
```
The sum of the RSS values is 312,260. According to the article [1], one
page is 4 KB in size. That make it less then 1.3 GB.
```
$ more /proc/meminfo # after OOM run
MemTotal: 7886032 kB
MemFree: 1613032 kB
MemAvailable: 4510132 kB
Buffers: 160536 kB
Cached: 3103908 kB
SwapCached: 0 kB
Active: 4004748 kB
Inactive: 1629624 kB
Active(anon): 2255340 kB
Inactive(anon): 158560 kB
Active(file): 1749408 kB
Inactive(file): 1471064 kB
Unevictable: 232 kB
Mlocked: 232 kB
HighTotal: 7065828 kB
HighFree: 1555764 kB
LowTotal: 820204 kB
LowFree: 57268 kB
SwapTotal: 4194300 kB
SwapFree: 4194300 kB
Dirty: 12 kB
Writeback: 0 kB
AnonPages: 2370220 kB
Mapped: 419968 kB
Shmem: 43972 kB
Slab: 460304 kB
SReclaimable: 423320 kB
SUnreclaim: 36984 kB
KernelStack: 4224 kB
PageTables: 14580 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 8137316 kB
Committed_AS: 5379296 kB
VmallocTotal: 122880 kB
VmallocUsed: 0 kB
VmallocChunk: 0 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
ShmemHugePages: 0 kB
ShmemPmdMapped: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 10232 kB
DirectMap2M: 901120 kB
```
So I wonder, why the OOM killer kicked in at all.
Hints and insight is appreciated.
Thanks,
Paul
[1] http://careers.directi.com/display/tu/Understanding+and+optimizing+Memory+utilization
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^ permalink raw reply [flat|nested] 2+ messages in thread* Re: Trying to understand OOM killer
2017-02-12 13:47 Trying to understand OOM killer Paul Menzel
@ 2017-02-19 15:00 ` Michal Hocko
0 siblings, 0 replies; 2+ messages in thread
From: Michal Hocko @ 2017-02-19 15:00 UTC (permalink / raw)
To: Paul Menzel; +Cc: linux-mm, linux-kernel
On Sun 12-02-17 14:47:13, Paul Menzel wrote:
> Dear Linux folks,
>
>
> since some time, at Linux 4.8, 4.9, and 4.10-rc6, the OOM kicks in on a
> 8 GB machine.
>
> ```
> Feb 12 08:21:50 asrocke350m1 kernel: updatedb.mlocat invoked oom-killer: gfp_mask=0x16040d0(GFP_TEMPORARY|__GFP_COMP|__GFP_NOTRACK), nodemask=
The output is truncated. Could you send the full oom report? But this
smells like an example of the lowmem exhaustion. This is a lowmem
request on 32b system
[...]
> Feb 12 08:21:53 asrocke350m1 kernel: Node 0 active_anon:479572kB inactive_anon:70712kB active_file:125844kB inactive_file:876364kB unevictable
> Feb 12 08:21:53 asrocke350m1 kernel: DMA free:3840kB min:788kB low:984kB high:1180kB active_anon:0kB inactive_anon:0kB active_file:0kB inactiv
> Feb 12 08:21:53 asrocke350m1 kernel: lowmem_reserve[]: 0 763 7663 7663
> Feb 12 08:21:53 asrocke350m1 kernel: Normal free:38764kB min:38828kB low:48532kB high:58236kB active_anon:0kB inactive_anon:0kB active_file:16
> Feb 12 08:21:53 asrocke350m1 kernel: lowmem_reserve[]: 0 0 55201 55201
lowmem is on the min watermark while there is no anonymous memory to be
reclaimed and we cannot really tell how much of the page cache as it is
truncated. We also do not know how large is the request because the
order part is missing. __GFP_COMP would suggest higher order request.
In short it is very likely that the OOM killer is genuine because the
given allocation request cannot be satisfied because the low mem
(~896MB) is depleted. This is an inherent problem of 32b kernels
unfortunately. Maybe there is a larger memory consumer in newer
kernels which changed the picture for you.
--
Michal Hocko
SUSE Labs
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