[Webkit-unassigned] [Bug 126122] [GTK] Particular sites may hang entire desktop

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=126122

--- Comment #29 from Carlos Alberto Lopez Perez <clopez at igalia.com> ---
You can reproduce this without killing your desktop by using Linux's cgroups to limit the amount of memory that webkit can use. This way is easier to reproduce and test:

$ sudo cgcreate -g memory:/testwebkitmem
$ echo $(( 1 * 1024 * 1024 * 1024 ))| sudo tee /sys/fs/cgroup/memory/testwebkitmem/memory.limit_in_bytes
$ echo $(( 2 * 1024 * 1024 * 1024 ))| sudo tee /sys/fs/cgroup/memory/testwebkitmem/memory.memsw.limit_in_bytes
$ sudo cgexec -g memory:/testwebkitmem sudo -H -u $USER Tools/jhbuild/jhbuild-wrapper --gtk run ./WebKitBuild/Release/bin/MiniBrowser http://www.reuters.com/article/us-new-york-flightcenter-idUSKCN0SC14B20151018

So, I quickly get WebKitWebProcess killed by the kernel's OOM-killer:

Task in /testwebkitmem killed as a result of limit of /testwebkitmem
memory: usage 1048576kB, limit 1048576kB, failcnt 72526
memory+swap: usage 1967216kB, limit 2097152kB, failcnt 0
kmem: usage 0kB, limit 18014398509481983kB, failcnt 0
Memory cgroup stats for /testwebkitmem: cache:3480KB rss:1045096KB rss_huge:0KB mapped_file:3476KB writeback:285804KB swap:918640KB inactive_anon:524344KB active_anon:524192KB inactive_file:0KB active_file:0KB unevictable:0KB
[ pid ]   uid  tgid total_vm      rss nr_ptes swapents oom_score_adj name
[17018]     0 17018    13843      806      31      120             0 sudo
[17019]     0 17019    13843        0      29      120             0 sudo
[17020]  1000 17020   515762    18778     226     6572             0 MiniBrowser
[17040]  1000 17040   775055    15724     312     6776             0 WebKitNetworkPr
[17042]  1000 17042  1085848   209041    1182   288385             0 WebKitWebProces
Memory cgroup out of memory: Kill process 17042 (WebKitWebProces) score 951 or sacrifice child
Killed process 17042 (WebKitWebProces) total-vm:4343392kB, anon-rss:752824kB, file-rss:83340kB


But, this doesn't kills or causes any instability on my system, so is a nice trick to debug memory problems.

My 2 cents.

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