p1020 unstable with 3.2

[Alexander Graf]

On 28.12.2011, at 06:01, Benjamin Herrenschmidt wrote:

> On Sun, 2011-12-25 at 11:48 +0100, Alexander Graf wrote:
>> On 24.12.2011, at 07:53, Benjamin Herrenschmidt wrote:
>> 
>>> On Fri, 2011-12-23 at 17:54 +0100, Alexander Graf wrote:
>>>> Hi guys,
>>>> 
>>>> While trying to test my latest patch queue for ppc kvm, I realized
>>>> that even though the device trees got updated, the p1020 box still is
>>>> unstable. The trace below is the one I've seen the most. It only
>>>> occurs during network I/O which happens a lot on that box, since I'm
>>>> running it using NFS root.
>>>> 
>>>> As for configuration, I use kumar's "merge" branch from today and the
>>>> p1020rdb.dts device tree provided in that tree.
>>>> 
>>>> The last known good configuration I'm aware of is 3.0.
>>>> 
>>>> Any ideas what's going wrong here?
>>> 
>>> Try SLAB instead of SLUB and let me know. It -could- be a bogon in SLUB
>>> that should be fixed upstream now but I think did hit 3.2
>> 
>> Yup, things seem a lot more stable with SLAB now :).
> 
> BTW. Fix for slub should be upstream:
> 
> 42d623a8cd08eb93ab221d22cee5a62618895bbf

Yup, works like a charm now again. Thanks a lot!


Alex