diff options
| author | Dave Kleikamp <dave.kleikamp@oracle.com> | 2013-06-18 09:05:36 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-28 16:18:32 -0700 |
| commit | 519d018ae15412bd501598872300d4c883197b44 (patch) | |
| tree | 5b96f9b3744f411e0515605e4c915477174baca1 | |
| parent | b37c61632db280b4e831dc2431a73ca045bc7e42 (diff) | |
sparc: tsb must be flushed before tlb
upstream commit 23a01138efe216f8084cfaa74b0b90dd4b097441
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 afd021ed9418..072f5530373e 100644 --- a/arch/sparc/mm/tlb.c +++ b/arch/sparc/mm/tlb.c @@ -115,8 +115,8 @@ no_cache_flush: } if (!tb->active) { - global_flush_tlb_page(mm, vaddr); flush_tsb_user_page(mm, vaddr); + global_flush_tlb_page(mm, vaddr); goto out; } |