From: Christoph Lameter <clameter@sgi.com>

Switch the memory policy of the kevent threads to MPOL_DEFAULT while
leaving the kzalloc of the workqueue structure on interleave.  This means
that all code executed in the context of the kevent thread is allocating
node local.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Alok Kataria <alok.kataria@calsoftinc.com>
Cc: Andi Kleen <ak@suse.de>
Cc: <pj@sgi.com>
Cc: <shai@scalex86.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 kernel/workqueue.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff -puN kernel/workqueue.c~mm-kevent-threads-use-mpol_default kernel/workqueue.c
--- a/kernel/workqueue.c~mm-kevent-threads-use-mpol_default
+++ a/kernel/workqueue.c
@@ -28,6 +28,7 @@
 #include <linux/notifier.h>
 #include <linux/kthread.h>
 #include <linux/hardirq.h>
+#include <linux/mempolicy.h>
 
 /*
  * The per-CPU workqueue (if single thread, we always use the first
@@ -245,6 +246,12 @@ static int worker_thread(void *__cwq)
 	sigprocmask(SIG_BLOCK, &blocked, NULL);
 	flush_signals(current);
 
+	/*
+	 * We inherited MPOL_INTERLEAVE from the booting kernel.
+	 * Set MPOL_DEFAULT to insure node local allocations.
+	 */
+	numa_default_policy();
+
 	/* SIG_IGN makes children autoreap: see do_notify_parent(). */
 	sa.sa.sa_handler = SIG_IGN;
 	sa.sa.sa_flags = 0;
_