On Thu, 2017-07-27 at 06:24:55 UTC, "Aneesh Kumar K.V" wrote:

We use mm cpumask for serializing against lockless page table walk. Anybody
who is doing a lockless page table walk is expected to disable irq and only
cpus in mm cpumask is expected do the lockless walk. This ensure that
a THP split can send IPI to only cpus in the mm cpumask, to make sure there
are no parallel lockless page table walk.

Add the CAPI fault handling cpu to the mm cpumask so that we can do the lockless
page table walk while inserting hash page table entries.

Reviewed-by: Frederic Barrat <redacted>
Signed-off-by: Aneesh Kumar K.V <redacted>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/0f4bc0932e51817105fdee77a46680

cheers