The patch titled
Subject: prctl: make PR_SET_THP_DISABLE wait for mmap_sem killable
has been removed from the -mm tree. Its filename was
prctl-make-pr_set_thp_disable-wait-for-mmap_sem-killable.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Michal Hocko <mhocko@xxxxxxxx>
Subject: prctl: make PR_SET_THP_DISABLE wait for mmap_sem killable
PR_SET_THP_DISABLE requires mmap_sem for write. If the waiting task gets
killed by the oom killer it would block oom_reaper from asynchronous
address space reclaim and reduce the chances of timely OOM resolving.
Wait for the lock in the killable mode and return with EINTR if the task
got killed while waiting.
Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Acked-by: Alex Thorlton <athorlton@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/sys.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN kernel/sys.c~prctl-make-pr_set_thp_disable-wait-for-mmap_sem-killable kernel/sys.c
--- a/kernel/sys.c~prctl-make-pr_set_thp_disable-wait-for-mmap_sem-killable
+++ a/kernel/sys.c
@@ -2246,7 +2246,8 @@ SYSCALL_DEFINE5(prctl, int, option, unsi
case PR_SET_THP_DISABLE:
if (arg3 || arg4 || arg5)
return -EINVAL;
- down_write(&me->mm->mmap_sem);
+ if (down_write_killable(&me->mm->mmap_sem))
+ return -EINTR;
if (arg2)
me->mm->def_flags |= VM_NOHUGEPAGE;
else
_
Patches currently in -mm which might be from mhocko@xxxxxxxx are
oom_reaper-close-race-with-exiting-task.patch
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