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mempolicy: don't call mpol_set_nodemask() when no_context

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No need to call mpol_set_nodemask() when we have no context for the
mempolicy.  This can occur when we're parsing a tmpfs 'mpol' mount option.
 Just save the raw nodemask in the mempolicy's w.user_nodemask member for
use when a tmpfs/shmem file is created.  mpol_shared_policy_init() will
"contextualize" the policy for the new file based on the creating task's
context.

Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: Ravikiran Thirumalai <kiran@scalex86.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Lee Schermerhorn 2010-05-24 14:32:02 -07:00 committed by Linus Torvalds
parent 1980050250
commit e17f74af35
1 changed files with 4 additions and 5 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

9
mm/mempolicy.c
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@ -2239,7 +2239,10 @@ int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context)
if (IS_ERR(new)) if (IS_ERR(new))
goto out; goto out;
{ if (no_context) {
/* save for contextualization */
new->w.user_nodemask = nodes;
} else {
int ret; int ret;
NODEMASK_SCRATCH(scratch); NODEMASK_SCRATCH(scratch);
if (scratch) { if (scratch) {
@ -2255,10 +2258,6 @@ int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context)
} }
} }
err = 0; err = 0;
if (no_context) {
/* save for contextualization */
new->w.user_nodemask = nodes;
}
out: out:
/* Restore string for error message */ /* Restore string for error message */