[vserver] OOM Killer in Guest crashes Host

From: Oliver Welter <mail_at_oliwel.de>
Date: Tue 13 Jul 2010 - 09:25:57 BST
Message-ID: <4C3C2315.9050106@oliwel.de>

Hi All,

I have a guest that runs out of memory due to limits set,
vserver-stats output is (www4 is the candidate):

67 45 2.5G 1.4G 1d01h24 3h25m34 33d01h27 mx
69 28 5.6G 381.8M 21m38s88 11m13s42 19h36m52 www1
70 26 2.9G 291.4M 3m53s25 1m22s45 31m01s88 www2
72 19 3.7G 277.3M 10h15m29 1h51m05 33d01h26 www3
74 20 4.2G 217.1M 0m42s84 0m19s54 27m37s12 www4

In the logs I get
Out of memory: kill process apache2(24000:#74) score 896596 or a child
Killed process apache2(3298:#74) vsz:352584kB, anon-rss:11348kB,
file-rss:4028kB

which is totaly fine - but after severel oom kills the whole HOST server
dies. The above line is the last one I see in the kernel log, afterwards
I get a bunch of binary data and then a syslog restart after the boot.

Anybody knows whats happening? I assume that the host and even other
guests should not be affected by a mad running guest....

Mileage: Host and Guests are running a recent gentoo build, vserver-info ist

                   Kernel: 2.6.33.4-vs2.3.0.36.30.4-aufs
                   VS-API: 0x00020305
             util-vserver: 0.30.216-pre2864; Apr 2 2010, 17:41:13

Features:
                       CC: x86_64-pc-linux-gnu-gcc, x86_64-pc-linux-gnu-gcc (Gentoo
4.3.4 p1.0, pie-10.1.5) 4.3.4
                      CXX: x86_64-pc-linux-gnu-g++,
x86_64-pc-linux-gnu-g++ (Gentoo 4.3.4 p1.0, pie-10.1.5) 4.3.4
                 CPPFLAGS: ''
                   CFLAGS: '-O2 -pipe -std=c99 -Wall -pedantic -W
-funit-at-a-time'
                 CXXFLAGS: '-O2 -pipe -ansi -Wall -pedantic -W
-fmessage-length=0 -funit-at-a-time'
               build/host: x86_64-pc-linux-gnu/x86_64-pc-linux-gnu
             Use dietlibc: yes
       Build C++ programs: yes
       Build C99 programs: yes
           Available APIs: v13,net,v21,v22,v23,netv2
            ext2fs Source: e2fsprogs
    syscall(2) invocation: alternative
      vserver(2) syscall#: 236/glibc
               crypto api: beecrypt
          python bindings: yes
   use library versioning: yes

Paths:
                   prefix: /usr
        sysconf-Directory: /etc
            cfg-Directory: /etc/vservers
         initrd-Directory: $(sysconfdir)/init.d
       pkgstate-Directory: /var/run/vservers
          vserver-Rootdir: /vservers

Oliver

-- 
Protect your environment -  close windows and adopt a penguin!
PGP-Key: 3B2C 8095 A7DF 8BB5 2CFF  8168 CAB7 B0DD 3985 1721

Received on Tue Jul 13 10:18:15 2010
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