The patch titled
Subject: mm/mempolicy: remove or narrow the lock on current
has been removed from the -mm tree. Its filename was
mm-mempolicy-remove-or-narrow-the-lock-on-current.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx>
Subject: mm/mempolicy: remove or narrow the lock on current
It is not necessary to hold the lock of current when setting nodemask of
a new policy.
Link: https://lkml.kernel.org/r/20200921040416.86185-1-richard.weiyang@xxxxxxxxxxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mempolicy.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
--- a/mm/mempolicy.c~mm-mempolicy-remove-or-narrow-the-lock-on-current
+++ a/mm/mempolicy.c
@@ -875,13 +875,12 @@ static long do_set_mempolicy(unsigned sh
goto out;
}
- task_lock(current);
ret = mpol_set_nodemask(new, nodes, scratch);
if (ret) {
- task_unlock(current);
mpol_put(new);
goto out;
}
+ task_lock(current);
old = current->mempolicy;
current->mempolicy = new;
if (new && new->mode == MPOL_INTERLEAVE)
@@ -1324,9 +1323,7 @@ static long do_mbind(unsigned long start
NODEMASK_SCRATCH(scratch);
if (scratch) {
mmap_write_lock(mm);
- task_lock(current);
err = mpol_set_nodemask(new, nmask, scratch);
- task_unlock(current);
if (err)
mmap_write_unlock(mm);
} else
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxxxxxxxxxx are
mm-page_reporting-drop-stale-list-head-check-in-page_reporting_cycle.patch
bitops-simplify-get_count_order_long.patch
bitops-use-the-same-mechanism-for-get_count_order.patch
