Bug#700755: huge slab_unreclaimable in Xen domU
On Sun, 2013-02-17 at 00:22 +0100, Josip Rodin wrote:
> Package: linux-image-2.6.32-5-xen-amd64
This is in a guest, right? Is it possible to try the non-Xen amd64
flavour? I forget the exact status in Squeeze but IIRC most of the domU
functionality is present in the -amd64 flavour with the -xen-amd64
flavour only being required for dom0 and some of the more advanced domU
features.
The reason I ask this is that the non-xen flavour is closer to mainline
and therefore should be easier to track down the issue with.
If you are also able separately to try this with the Wheezy kernel that
would be very useful too.
> The thing I noticed was the slab_unreclaimable explosion, by a factor
> of 122. That... doesn't sound like something that should be happenning.
Indeed. Is the system responsive enough to login and
examine /proc/slabinfo? There is probably one which has exploded in
size, it may even be sufficient to observe this over time and see if one
seems to be slowly creeping upwards towards $doom.
> I'm going to try to run slabtop the next time I catch it in this state,
> in order to try to glean some more information.
That would be great.
Cheers,
Ian.
--
Ian Campbell
Do not simplify the design of a program if a way can be found to make
it complex and wonderful.
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