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| author | Dave Kleikamp <dave.kleikamp@oracle.com> | 2013-06-18 09:05:36 -0500 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-08-02 22:14:51 +0200 |
| commit | 2f92512982ce9672ec70838ac7f2eea4fdb1d534 (patch) | |
| tree | 3fc106737c98ba2a1f283cb188fc94de22487e3c /arch/sparc | |
| parent | 5d231ecea4c70ae9fc9f44a0fd8ea593e7e98986 (diff) | |
| download | kernel_samsung_smdk4412-2f92512982ce9672ec70838ac7f2eea4fdb1d534.zip kernel_samsung_smdk4412-2f92512982ce9672ec70838ac7f2eea4fdb1d534.tar.gz kernel_samsung_smdk4412-2f92512982ce9672ec70838ac7f2eea4fdb1d534.tar.bz2 | |
sparc: tsb must be flushed before tlb
commit 23a01138efe216f8084cfaa74b0b90dd4b097441 upstream.
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: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'arch/sparc')
| -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 afd021e..072f553 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; } |