The patch titled
Subject: mm-mempolicy-dont-handle-mpol_local-like-a-fake-mpol_preferred-policy-v4-fix
has been added to the -mm tree. Its filename is
mm-mempolicy-dont-handle-mpol_local-like-a-fake-mpol_preferred-policy-v4-fix.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-mempolicy-dont-handle-mpol_local-like-a-fake-mpol_preferred-policy-v4-fix.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-mempolicy-dont-handle-mpol_local-like-a-fake-mpol_preferred-policy-v4-fix.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Feng Tang <feng.tang@xxxxxxxxx>
Subject: mm-mempolicy-dont-handle-mpol_local-like-a-fake-mpol_preferred-policy-v4-fix
refine code and comments of mpol_set_nodemask(), per Michal
Link: https://lkml.kernel.org/r/20210603081807.GE56979@xxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Feng Tang <feng.tang@xxxxxxxxx>
Suggested-by: Michal Hocko <mhocko@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mempolicy.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
--- a/mm/mempolicy.c~mm-mempolicy-dont-handle-mpol_local-like-a-fake-mpol_preferred-policy-v4-fix
+++ a/mm/mempolicy.c
@@ -226,11 +226,12 @@ static int mpol_set_nodemask(struct memp
{
int ret;
- /* if mode is MPOL_DEFAULT, pol is NULL. This is right. */
- if (pol == NULL)
- return 0;
-
- if (pol->mode == MPOL_LOCAL)
+ /*
+ * Default (pol==NULL) resp. local memory policies are not a
+ * subject of any remapping. They also do not need any special
+ * constructor.
+ */
+ if (!pol || pol->mode == MPOL_LOCAL)
return 0;
/* Check N_MEMORY */
_
Patches currently in -mm which might be from feng.tang@xxxxxxxxx are
mm-mempolicy-cleanup-nodemask-intersection-check-for-oom.patch
mm-mempolicy-dont-handle-mpol_local-like-a-fake-mpol_preferred-policy.patch
mm-mempolicy-dont-handle-mpol_local-like-a-fake-mpol_preferred-policy-v4.patch
mm-mempolicy-dont-handle-mpol_local-like-a-fake-mpol_preferred-policy-v4-fix.patch
mm-mempolicy-unify-the-parameter-sanity-check-for-mbind-and-set_mempolicy.patch
mm-mempolicy-unify-the-parameter-sanity-check-for-mbind-and-set_mempolicy-v4.patch
