diff options
author | Dave Kleikamp <dave.kleikamp@oracle.com> | 2013-06-18 14:05:36 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2013-06-19 09:10:30 (GMT) |
commit | 23a01138efe216f8084cfaa74b0b90dd4b097441 (patch) | |
tree | 3a13b9b2383b9077e54d998abb2e41365abe7aa6 /arch | |
parent | f670758f5b829169562e1016a72af0c59360a541 (diff) | |
download | linux-fsl-qoriq-23a01138efe216f8084cfaa74b0b90dd4b097441.tar.xz |
sparc: tsb must be flushed before tlb
This fixes a race where a cpu may re-load a tlb from a stale tsb right
after it has been flushed by a remote function call.
I still see some instability when stressing the system with parallel
kernel builds while creating memory pressure by writing to
/proc/sys/vm/nr_hugepages, but this patch improves the stability
significantly.
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Acked-by: Bob Picco <bob.picco@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/sparc/mm/tlb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/sparc/mm/tlb.c b/arch/sparc/mm/tlb.c index 83d89bc..37e7bc4 100644 --- a/arch/sparc/mm/tlb.c +++ b/arch/sparc/mm/tlb.c @@ -85,8 +85,8 @@ static void tlb_batch_add_one(struct mm_struct *mm, unsigned long vaddr, } if (!tb->active) { - global_flush_tlb_page(mm, vaddr); flush_tsb_user_page(mm, vaddr); + global_flush_tlb_page(mm, vaddr); goto out; } |