[igt-dev] ✓ Fi.CI.IGT: success for series starting with [i-g-t,1/2] lib: Prioritise oom targetting our children.

[Chris Wilson]

Quoting Patchwork (2018-05-25 21:24:03)
> == Series Details ==
> 
> Series: series starting with [i-g-t,1/2] lib: Prioritise oom targetting our children.
> URL   : https://patchwork.freedesktop.org/series/43771/
> State : success
> 
> == Summary ==
> 
> = CI Bug Log - changes from IGT_4498_full -> IGTPW_1401_full =
> 
> == Summary - WARNING ==
> 
>   Minor unknown changes coming with IGTPW_1401_full need to be verified
>   manually.
>   
>   If you think the reported changes have nothing to do with the changes
>   introduced in IGTPW_1401_full, please notify your bug team to allow them
>   to document this new failure mode, which will reduce false positives in CI.
> 
>   External URL: https://patchwork.freedesktop.org/api/1.0/series/43771/revisions/1/mbox/
> 
> == Possible new issues ==
> 
>   Here are the unknown changes that may have been introduced in IGTPW_1401_full:
> 
>   === IGT changes ===
> 
>     ==== Possible regressions ====
> 
>     {igt at drv_suspend@shrink}:
>       shard-snb:          NOTRUN -> FAIL
>       shard-hsw:          NOTRUN -> FAIL
>       shard-apl:          NOTRUN -> FAIL
>       shard-glk:          NOTRUN -> FAIL


<6>[  381.756790] [ pid ]   uid  tgid total_vm      rss pgtables_bytes swapents oom_score_adj name
<6>[  381.756809] [  199]     0   199    43711        0   356352      179             0 systemd-journal
<6>[  381.756818] [  223]     0   223    11093        0   114688      523         -1000 systemd-udevd
<6>[  381.756827] [  323]   102   323    17652        0   176128      177             0 systemd-resolve
<6>[  381.756834] [  354]     0   354    45273        0   196608      206             0 thermald
<6>[  381.756841] [  375]     0   375   106781        0   327680      354             0 ModemManager
<6>[  381.756848] [  388]     0   388     8135        0   106496      100             0 cron
<6>[  381.756856] [  395]     0   395    17646        0   180224      181             0 systemd-logind
<6>[  381.756863] [  401]   104   401    65759        0   159744      454             0 rsyslogd
<6>[  381.756870] [  404]   118   404    11845        0   139264      152             0 avahi-daemon
<6>[  381.756878] [  413]   118   413    11769        0   131072       85             0 avahi-daemon
<6>[  381.756885] [  423]     0   423     1138        0    57344       41             0 acpid
<6>[  381.756893] [  432]     0   432    27627        0   114688      101             0 irqbalance
<6>[  381.756900] [  438]     0   438    42936        2   225280     1998             0 networkd-dispat
<6>[  381.756908] [  440]   106   440    12594        0   139264      250          -900 dbus-daemon
<6>[  381.756915] [  447]     0   447    11188        0   126976      150             0 wpa_supplicant
<6>[  381.756922] [  451]     0   451     2479        0    57344       36             0 rngd
<6>[  381.756929] [  490]     0   490    72217        0   204800      219             0 polkitd
<6>[  381.756937] [  504]     0   504   120443        0   421888      716             0 NetworkManager
<6>[  381.756944] [  609]     0   609    18074        0   180224      188         -1000 sshd
<6>[  381.756952] [  611]     0   611     4350        0    73728       37             0 agetty
<6>[  381.756959] [  773]     0   773    26431        1   241664      248             0 sshd
<6>[  381.756966] [  778]  1000   778    19149        1   180224      269             0 systemd
<6>[  381.756973] [  781]  1000   781    28473        0   262144      620             0 (sd-pam)
<6>[  381.756981] [  819]  1000   819    27041        1   245760      290             0 sshd
<6>[  381.756988] [  848]  1000   848  1397624        0   700416    28215             0 java
<6>[  381.756995] [  880]  1000   880     3526        1    73728       72             0 bash
<6>[  381.757003] [  946]     0   946    16707        1   180224      119             0 sudo
<6>[  381.757010] [  951]     0   951     2479        0    65536       36             0 rngd
<6>[  381.757017] [  969]  1000   969     3807        0    77824       45             0 dmesg
<6>[  381.757024] [  971]     0   971    16707        1   180224      120             0 sudo
<6>[  381.757031] [  975]     0   975     1129        0    53248       22             0 owatch
<6>[  381.757039] [  976]     0   976   264811        0   577536    32095             0 python3
<6>[  381.757056] [ 1558]     0  1558     6414        1    98304      304             0 dhclient
<6>[  381.757064] [ 1699]     0  1699  2042728        1   405504      430           900 drv_suspend
<6>[  381.757071] [ 1712]     0  1712  2042728  1929000 15839232        0          1000 drv_suspend
<3>[  381.757076] Out of memory: Kill process 1699 (drv_suspend) score 900 or sacrifice child
<3>[  381.757690] Killed process 1699 (drv_suspend) total-vm:8170912kB, anon-rss:0kB, file-rss:0kB, shmem-rss:4kB

How? Explain to me how oomkiller picked the parent with score 900 over 
the child that has a base score of 1000.
-Chris