On Mon, 2017-08-21 at 23:39 +1000, Michael Ellerman wrote: > 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 <fbar...@linux.vnet.ibm.com> > > Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com> > > Applied to powerpc next, thanks. > > https://git.kernel.org/powerpc/c/0f4bc0932e51817105fdee77a46680
Do you need barriers between the cpumask set and the walking ? Cheers, Ben.
