[PATCH V2 0/3] powerpc: Fix random application crashes with NUMA_BALANCING enabled

[Aneesh Kumar K.V]

Andrew Morton <akpm at linux-foundation.org> writes:

> On Wed, 12 Feb 2014 09:13:35 +0530 "Aneesh Kumar K.V" <aneesh.kumar at linux.vnet.ibm.com> wrote:
>
>> Hello,
>> 
>> This patch series fix random application crashes observed on ppc64 with numa
>> balancing enabled. Without the patch we see crashes like
>> 
>> anacron[14551]: unhandled signal 11 at 0000000000000041 nip 000000003cfd54b4 lr 000000003cfd5464 code 30001
>> anacron[14599]: unhandled signal 11 at 0000000000000041 nip 000000003efc54b4 lr 000000003efc5464 code 30001
>> 
>
> Random application crashes are bad.  Which kernel version(s) do you think
> need fixing here?
>
> I grabbed the patches but would like to hear from Ben (or something
> approximating him) before doing anything with them, please.
>

Considering this impact only ppc64 and also only when numa balancing is enabled, we
only need to send this upstream. (no need to backport to any other
kernel versions)

We merged numa balancing support for ppc64
(c34a51ce49b40b9667cd7f5cc2e40475af8b4c3d) only in this merge window.

$git describe --contains c34a51ce49b40b9667cd7f5cc2e40475af8b4c3d
v3.14-rc1~80^2~35


-aneesh