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author | Balbir Singh <bsingharora@gmail.com> | 2017-05-25 17:28:32 +1000 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-06-05 19:02:55 +1000 |
commit | c5cee6421cd651446b93c231f0ab8ff2530ba25d (patch) | |
tree | b9505e91b8da77edf6a5fe1b55a3d57915d4d684 /arch/powerpc/mm/tlb_hash64.c | |
parent | 64d09f5ecb237974bc824800e5e5012fd71801c7 (diff) | |
download | linux-c5cee6421cd651446b93c231f0ab8ff2530ba25d.tar.gz linux-c5cee6421cd651446b93c231f0ab8ff2530ba25d.tar.bz2 linux-c5cee6421cd651446b93c231f0ab8ff2530ba25d.zip |
powerpc/mm/hash: Do a local flush if possible when no batch is active
Currently in hpte_need_flush() if there is no batch pending we always do a
global TLB flush, which is inefficient if the mm has never run on another
thread.
Instead do the same check that __flush_tlb_pending() does and check if a local
flush is sufficient when batch->active is false. Instead of open-coding it we
use mm_is_thread_local().
Signed-off-by: Balbir Singh <bsingharora@gmail.com>
[mpe: Don't use a local, just inline mm_is_thread_local()]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/tlb_hash64.c')
-rw-r--r-- | arch/powerpc/mm/tlb_hash64.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/arch/powerpc/mm/tlb_hash64.c b/arch/powerpc/mm/tlb_hash64.c index 4517aa43a8b1..b5b0fb97b9c0 100644 --- a/arch/powerpc/mm/tlb_hash64.c +++ b/arch/powerpc/mm/tlb_hash64.c @@ -93,12 +93,10 @@ void hpte_need_flush(struct mm_struct *mm, unsigned long addr, /* * Check if we have an active batch on this CPU. If not, just - * flush now and return. For now, we don global invalidates - * in that case, might be worth testing the mm cpu mask though - * and decide to use local invalidates instead... + * flush now and return. */ if (!batch->active) { - flush_hash_page(vpn, rpte, psize, ssize, 0); + flush_hash_page(vpn, rpte, psize, ssize, mm_is_thread_local(mm)); put_cpu_var(ppc64_tlb_batch); return; } |