RE: [Xen-devel] dom0 oom-killer: gfp_mask=0x1d

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> I had the dom0 which unfortunately didn't have a console on it hit a
> race condition and saw oom errors on it also. This happened 
> after it was
> running for over 36 hours with a domU whose load average was avg was
> around 3 most of the time.

Were you running anything in the dom0 other than xend etc?

It looks like the slabcache it dom0 is over 100MB, so having the ouput
of /proc/slabinfo would be interesting when the machine is in this
state. It might be good to look at this overtime and see if something is
being leaked.

Ian


> changeset:   7396:9b51e7637676
> 
> Dom0 - UP i686, Centos 4.1, 768 megs
> 
> domU-1 92 megs snmpd
> domU-2 92 megs snmpdd
> domU-3 410 megs postgres, tomcat 5.5, opennms head on java 5
> 
> Got this from syslog
> 
>  Oct 18 10:31:28 tarkus kernel: peth0: received packet with  
> own address
> as source address
> Oct 18 10:32:03 tarkus kernel: peth0: received packet with  
> own address
> as source address
> Oct 18 10:33:53 tarkus kernel: oom-killer: gfp_mask=0xd2
> Oct 18 10:33:53 tarkus kernel: DMA per-cpu:
> Oct 18 10:33:53 tarkus kernel: cpu 0 hot: low 30, high 90, batch 15
> Oct 18 10:33:53 tarkus kernel: cpu 0 cold: low 0, high 30, batch 15
> Oct 18 10:33:53 tarkus kernel: Normal per-cpu: empty
> Oct 18 10:33:53 tarkus kernel: HighMem per-cpu: empty
> Oct 18 10:33:53 tarkus kernel:
> Oct 18 10:33:53 tarkus kernel: Free pages:        1948kB (0kB HighMem)
> Oct 18 10:34:02 tarkus kernel: Active:899 inactive:695 dirty:0
> writeback:7 unstable:0 free:487 slab:28555 mapped:815 pagetables:206
> Oct 18 10:34:09 tarkus crond(pam_unix)[25117]: session closed for user
> root
> Oct 18 10:34:16 tarkus kernel: DMA free:1948kB min:1480kB low:1848kB
> high:2220kB active:3596kB inactive:2780kB present:137200kB
> pages_scanned:1480 all_unreclaimable? no
> Oct 18 10:34:42 tarkus kernel: lowmem_reserve[]: 0 0 0
> Oct 18 10:34:53 tarkus kernel: Normal free:0kB min:0kB 
> low:0kB high:0kB
> active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable?
> no
> Oct 18 10:35:01 tarkus kernel: lowmem_reserve[]: 0 0 0
> Oct 18 10:35:02 tarkus kernel: HighMem free:0kB min:128kB low:160kB
> high:192kB active:0kB inactive:0kB present:0kB pages_scanned:0
> all_unreclaimable? no
> Oct 18 10:35:10 tarkus kernel: lowmem_reserve[]: 0 0 0
> Oct 18 10:35:17 tarkus crond(pam_unix)[25252]: session opened for user
> root by (uid=0)
> Oct 18 10:35:22 tarkus kernel: DMA: 113*4kB 9*8kB 3*16kB 1*32kB 1*64kB
> 0*128kB 1*256kB 0*512kB 1*1024kB 0*2048kB 0*4096kB = 1948kB
> Oct 18 10:35:28 tarkus kernel: Normal: empty
> Oct 18 10:35:37 tarkus kernel: HighMem: empty
> Oct 18 10:35:43 tarkus kernel: Swap cache: add 164344, delete 163838,
> find 45906/87552, race 0+46
> Oct 18 10:35:43 tarkus kernel: Free swap  = 1553068kB
> Oct 18 10:35:43 tarkus kernel: Total swap = 1572856kB
> Oct 18 10:35:43 tarkus kernel: Out of Memory: Killed process 25124
> (sendmail).
> Oct 18 10:35:52 tarkus snmpd[3925]: send response:  (if_nameindex()
> failed)
> Oct 18 10:36:06 tarkus snmpd[3925]: send response:
> Oct 18 10:36:26 tarkus snmpd[3925]: send response:
> Oct 18 10:37:00 tarkus last message repeated 4 times
> Oct 18 10:37:02 tarkus kernel: peth0: received packet with  
> own address
> as source address
> 
> Regards,
> Ted
> 
> 
> 
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> 

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