Commit 5e0fed71 authored Nov 08, 2018 by Kirill Tkhai Committed by Miklos Szeredi Feb 13, 2019

fuse: Wake up req->waitq of only if not background

Currently, we wait on req->waitq in request_wait_answer() function only,
and it's never used for background requests. Since wake_up() is not a
light-weight macros, instead of this, it unfolds in really called function,
which makes locking operations taking some cpu cycles, let's avoid its call
for the case we definitely know it's completely useless.

Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

parent 217316a6

fs/fuse/dev.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -468,8 +468,11 @@ static void request_end(struct fuse_conn fc, struct fuse_req req)
		fc->active_background--;
		flush_bg_queue(fc);
		spin_unlock(&fc->bg_lock);
		}
		} else {
		/* Wake up waiter sleeping in request_wait_answer() */
		wake_up(&req->waitq);
		}

		if (req->end)
		req->end(fc, req);
		put_request:

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