From 23a01138efe216f8084cfaa74b0b90dd4b097441 Mon Sep 17 00:00:00 2001 From: Dave Kleikamp Date: Tue, 18 Jun 2013 09:05:36 -0500 Subject: 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 Acked-by: Bob Picco Signed-off-by: David S. Miller --- arch/sparc/mm/tlb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/sparc') 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; } -- cgit v1.1