Commits
![Christophe Leroy](https://secure.gravatar.com/avatar/008188794c64dccbcc919ad93dc667c0.jpg?s=96&d=mm)
Christophe Leroy committed e8de85ca32f
powerpc/mm: Only call store_updates_sp() on stores in do_page_fault() Function store_updates_sp() checks whether the faulting instruction is a store updating r1. Therefore we can limit its calls to store exceptions. This patch is an improvement of commit a7a9dcd882a67 ("powerpc: Avoid taking a data miss on every userspace instruction miss") With the same microbenchmark app, run with 500 as argument, on an MPC885 we get: Before this patch: 152000 DTLB misses After this patch: 147000 DTLB misses Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>