Bug#698829: kernel swap after upgrade to 3.2.23-1~bpo60+2
Hi,
after kernel upgrade i've the following situation:
after 2 days of uptime:
08:41:41 up 2 days, 14:56, 0 users, load average: 13.07, 13.83, 13.65
size-192(DMA) 0 0 192 20 1 : tunables 120 60
8 : slabdata 0 0 0
size-192 35599 83060 192 20 1 : tunables 120 60
8 : slabdata 4153 4153 273
after 6 days of uptime:
08:41:41 up 6 days, 1:56, 0 users, load average: 16.60, 15.22, 14.48
size-192(DMA) 0 0 192 20 1 : tunables 120 60
8 : slabdata 0 0 0
size-192 1780288 1799240 192 20 1 : tunables 120 60
8 : slabdata 89962 89962 256
As you can see the size-192 is increasing and after the 7th days the
server start swapping.
The server is a shared hosting linux with apache + cgi-wrapper and has a
lots of entries in /proc/mounts:
# wc -l /proc/mounts
329219 /proc/mounts
On 28/01/2013 05:42, Ben Hutchings wrote:
> Control: tag -1 moreinfo
>
> On Thu, 2013-01-24 at 09:11 +0100, Daniele Melosi wrote:
>> Package: linux-image-3.2.0-0.bpo.3-amd64
>> Version: 3.2.23-1~bpo60+2
>
> This is quite a few months out of date and there have been many bug
> fixes since then. Please upgrade to linux-image-3.2.0-0.bpo.4-amd64
> version 3.2.35-2~bpo60+1 and report whether the bug remains.
>
>> In a linux web server (a LAMP architecture) after upgrade the kernel
>> version to the backport one, the system start swapping after a week of
>> utilization.
>>
>> In /proc/slapinfo the main difference is in size-192:
>>
>> after reboot:
>> size-192 3363 3980 192 20 1 : tunables 120 60
>> 8 : slabdata 199 199 209
>>
>> after 2 weeks:
>> size-192 39806000 39806000 192 20 1 : tunables 120
>> 60 8 : slabdata 1990300 1990300 131
>
> A fairly clear memory leak, but sadly it's not obvious what is leaking.
>
> Please send the output of:
> - lsmod
> - lspci
> - dmesg
>
>> I'm using debian 6.0.2 with backported kernel (3.2.23-1~bpo60+2) and
>> libc6 2.11.3-3.
>
> Ben.
>
--
Daniele Melosi
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