From: John L. Hammond Date: Wed, 2 Mar 2016 22:01:52 +0000 (-0500) Subject: staging: lustre: set task state before scheduling in lnet_sock_accept X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=933d36ba1485abe4f3d7ae23cecf87a2b71020d1;p=linux-beck.git staging: lustre: set task state before scheduling in lnet_sock_accept In the original code change when libcfs_sock_accept() was made into lnet_sock_accept() a call to set_current_state(TASK_INTERRUPTIBLE) got dropped which was restored. For upstream this is an optimization of calling init_waitqueue_entry() only if accept() return -EAGAIN. Also we can remove setting the task to TASK_RUNNING that is not needed. Signed-off-by: John L. Hammond Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-6407 Reviewed-on: http://review.whamcloud.com/14265 Reviewed-by: James Simmons Reviewed-by: Amir Shehata Reviewed-by: Oleg Drokin Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/lustre/lnet/lnet/lib-socket.c b/drivers/staging/lustre/lnet/lnet/lib-socket.c index 5d770490a21a..269a6d8ab84b 100644 --- a/drivers/staging/lustre/lnet/lnet/lib-socket.c +++ b/drivers/staging/lustre/lnet/lnet/lib-socket.c @@ -531,8 +531,6 @@ lnet_sock_accept(struct socket **newsockp, struct socket *sock) struct socket *newsock; int rc; - init_waitqueue_entry(&wait, current); - /* * XXX this should add a ref to sock->ops->owner, if * TCP could be a module @@ -548,11 +546,11 @@ lnet_sock_accept(struct socket **newsockp, struct socket *sock) rc = sock->ops->accept(sock, newsock, O_NONBLOCK); if (rc == -EAGAIN) { /* Nothing ready, so wait for activity */ - set_current_state(TASK_INTERRUPTIBLE); + init_waitqueue_entry(&wait, current); add_wait_queue(sk_sleep(sock->sk), &wait); + set_current_state(TASK_INTERRUPTIBLE); schedule(); remove_wait_queue(sk_sleep(sock->sk), &wait); - set_current_state(TASK_RUNNING); rc = sock->ops->accept(sock, newsock, O_NONBLOCK); }