From: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
shmctl also don't need synchrounous pagevec drain. This patch replace it with
lru_add_drain_all_async().
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
---
ipc/shm.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/ipc/shm.c b/ipc/shm.c
index 02ecf2c..1eb25f0 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -872,8 +872,6 @@ SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf)
{
struct file *uninitialized_var(shm_file);
- lru_add_drain_all(); /* drain pagevecs to lru lists */
-
shp = shm_lock_check(ns, shmid);
if (IS_ERR(shp)) {
err = PTR_ERR(shp);
@@ -911,6 +909,8 @@ SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf)
shp->mlock_user = NULL;
}
shm_unlock(shp);
+ /* prevent user visible mismatch of unevictable accounting */
+ lru_add_drain_all_async();
goto out;
}
case IPC_RMID:
--
1.7.1
--
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