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| author | Lee Schermerhorn <lee.schermerhorn@hp.com> | 2010-03-23 13:35:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-24 16:31:22 -0700 |
| commit | c6b6ef8bb05af632889c5536513b9f4004961f73 (patch) | |
| tree | 85f90f246fa1da0d47c48c43a735bbfac33c542e /mm | |
| parent | 7198f3c9b13c7aa1e5d9f7ff74c0ea303174feff (diff) | |
| download | lwn-c6b6ef8bb05af632889c5536513b9f4004961f73.tar.gz lwn-c6b6ef8bb05af632889c5536513b9f4004961f73.zip | |
mempolicy: fix get_mempolicy() for relative and static nodes
Discovered while testing other mempolicy changes:
get_mempolicy() does not handle static/relative mode flags correctly.
Return the value that the user specified so that it can be restored
via set_mempolicy() if desired.
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>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/mempolicy.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 6cdfa1df57f6..8034abd3a135 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -806,9 +806,13 @@ static long do_get_mempolicy(int *policy, nodemask_t *nmask, err = 0; if (nmask) { - task_lock(current); - get_policy_nodemask(pol, nmask); - task_unlock(current); + if (mpol_store_user_nodemask(pol)) { + *nmask = pol->w.user_nodemask; + } else { + task_lock(current); + get_policy_nodemask(pol, nmask); + task_unlock(current); + } } out: |