From: Dave Kleikamp <dave.kleikamp@oracle.com>
Date: Tue, 18 Jun 2013 14:05:36 +0000 (-0500)
Subject: sparc: tsb must be flushed before tlb
X-Git-Tag: v3.2.50~58
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2f92512982ce9672ec70838ac7f2eea4fdb1d534;p=pandora-kernel.git

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>
---

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