[Xen-users] Re: Memory leak in i2o (kernel 2.6.16-xen)

["Esteban Sancho" <esteban.sancho@xxxxxxxxx>]

Hi again,

It finally seems to be a problem not related to xen but to the kernel
itself. I'm not 100% sure but I suspect that the root of the problem
is in the i2o drivers since it started to happen when I installed the
Adaptec card.

The symptom is: The size-64 slab starts growing until the server runs
out of memory.

I tried with both the xenified and vanilla 2.6.16 and 2.6.16.13
kernels with the same results. The problem doesn't appear in the
following kernels so it seems to be related to 2.6.16:

2.6.9-34.ELsmp (CentOS default)
2.6.17 (Vanilla)

I tried every patch I could find but with no success.

Now, it seems that I could resolve this problem if I could xenify any
of the working kernels (2.6.9-34.ELsmp or 2.6.17) but I'm not having
much success in doing so. I tried running
mkbuildtree pointing to the tree of both working kernels but several
problems arise when trying to compile any of them.

Could someone please give me a hint on how to work around this problem?

Thanks in advance,

Esteban

On 6/18/06, Esteban Sancho <esteban.sancho@xxxxxxxxx> wrote:
> Hi folks,
>
> The xen system I'm running is experiencing some memory related
> problems since I installed an Adaptec 2400A Raid controller. Once
> booted, it starts eating the system memory and finally crashes when it
> runs out of it. It takes less than 10 minutes to crash a Dom0 with 256
> MB so it seems to be really hungry :o)
> I'm running xen on CentOS 4.3 and the problem doesn't appear if I boot
> using the default kernel (without xen). I started digging into the
> problem and trying with both binary and source kernel 2.6.16-xen
> installation with identical results. I finally found a known problem
> in the i2o drivers and the patch specified in the following link:
>
> http://openvz.org/pipermail/devel/2006-March/000266.html
>
> I checked into the linux-2.6.16-xen source tree and the patch doesn't
> seem to be applied. I tried to find some information in both the xen
> users and devel mailing lists but with no success.
>
> Does anybody know if the patch was already applied in any
> distribution? I'll try and apply the patch and see what happens in the
> meantime.
>
> Thanks in advance,
>
> Esteban
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