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authorChristoph Lameter <clameter@sgi.com>2007-01-22 20:40:45 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-01-23 07:52:06 -0800
commit30150f8d7b76f25b1127a5079528b7a17307f995 (patch)
tree3ea69d5dbd7b131fc32bbf416ba9970079bd25c6 /mm
parent[PATCH] tlclk: bug fix + misc fixes (diff)
downloadlinux-dev-30150f8d7b76f25b1127a5079528b7a17307f995.tar.xz
linux-dev-30150f8d7b76f25b1127a5079528b7a17307f995.zip
[PATCH] mbind: restrict nodes to the currently allowed cpuset
Currently one can specify an arbitrary node mask to mbind that includes nodes not allowed. If that is done with an interleave policy then we will go around all the nodes. Those outside of the currently allowed cpuset will be redirected to the border nodes. Interleave will then create imbalances at the borders of the cpuset. This patch restricts the nodes to the currently allowed cpuset. The RFC for this patch was discussed at http://marc.theaimsgroup.com/?t=116793842100004&r=1&w=2 Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Paul Jackson <pj@sgi.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/mempolicy.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index da9463946556..c2aec0e1090d 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -884,6 +884,10 @@ asmlinkage long sys_mbind(unsigned long start, unsigned long len,
err = get_nodes(&nodes, nmask, maxnode);
if (err)
return err;
+#ifdef CONFIG_CPUSETS
+ /* Restrict the nodes to the allowed nodes in the cpuset */
+ nodes_and(nodes, nodes, current->mems_allowed);
+#endif
return do_mbind(start, len, mode, &nodes, flags);
}