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authorJeff Layton <jlayton@redhat.com>2013-03-25 07:59:57 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2013-04-05 17:03:52 -0400
commit25d280aad82e559cc7bc762410cd35ea5b98e294 (patch)
tree07c6185345f59b818e51684104aa2ed99cd15931 /fs/nfs/callback.c
parent809b426c7fc46b07065eb382c0289710c34b37e4 (diff)
downloadlinux-25d280aad82e559cc7bc762410cd35ea5b98e294.tar.bz2
nfs: allow the v4.1 callback thread to freeze
The v4.1 callback thread has set_freezable() at the top, but it doesn't ever try to freeze within the loop. Have it call try_to_freeze() at the top of the loop. If a freeze event occurs, recheck kthread_should_stop() after thawing. Reported-by: Yanchuan Nian <ycnian@gmail.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/callback.c')
-rw-r--r--fs/nfs/callback.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 5088b57b078a..cff089a412c7 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -125,6 +125,9 @@ nfs41_callback_svc(void *vrqstp)
set_freezable();
while (!kthread_should_stop()) {
+ if (try_to_freeze())
+ continue;
+
prepare_to_wait(&serv->sv_cb_waitq, &wq, TASK_INTERRUPTIBLE);
spin_lock_bh(&serv->sv_cb_lock);
if (!list_empty(&serv->sv_cb_list)) {