Re: Out of memory + skbuff_head_cache

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On Tue, Apr 14, 2009 at 8:37 AM, Tekale Sharad-FHJN78
<FHJN78@xxxxxxxxxxxx> wrote:
> Hi,
>
> I'm using linux 2.6.21.5 and our kernel is freeze.
>
> The problem I'm facing is, when I create a software bridge using $brctl
> command. and add two interfaces say, eth0.0 and eth0.1, this way...
> $brctl addbr br-lan
> $brctl addif br-lan eth0.0
> $brctl addif br-lan eth0.1
>
> When I send traffic from a host connected to one port to host connected at
> other at or above end 60Mbits/sec ,
>  soon all the memory is dried up/consumed and and system crashes.

Looks like a possible memory leak. Your interfaces suggest you are using Xen(?).
Did you add any code? If yes, check for memory leaks.

HTH
>
> Observation:
> On initial start up:
> $cat /proc/slabinfo | grep skbuff_head_cache
> skbuff_head_cache    120    120    192   20    1 : tunables  120   60    0 :
> slabdata      6
>
> Before crash:
> $cat /proc/slabinfo | grep skbuff_head_cache
> skbuff_head_cache   4260   4260    192   20    1 : tunables  120   60    0 :
> slabdata    213    213      0
> Can any one help me to refer to some patch or point to some location in code
> from where memory is failed to deallocate.
>
> Thanks,
> Sharad.



-- 
Pradeep

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