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Commit 4e2e0b5c authored by Pradeep P V K's avatar Pradeep P V K
Browse files

fuse: give wakeup hints to the scheduler 



Use synchronous wakeup interface to wakeup the userspace daemon.
Scheduler can make use of this hint to find a better CPU for the
waker task.

Change-Id: I7d077235f9b8fe771869dd7e6fccee7d356d858b
Suggested-by: default avatarPavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: default avatarPradeep P V K <pragalla@codeaurora.org>
parent 85866d27

fs/fuse/dev.c

+9 −5
Original line number Diff line number Diff line
@@ -327,11 +327,15 @@ static u64 fuse_get_unique(struct fuse_iqueue *fiq) 
	return ++fiq->reqctr;

}



static void queue_request(struct fuse_iqueue *fiq, struct fuse_req *req)

static void queue_request(struct fuse_iqueue *fiq, struct fuse_req *req,

				bool sync)

{

	req->in.h.len = sizeof(struct fuse_in_header) +

		len_args(req->in.numargs, (struct fuse_arg *) req->in.args);

	list_add_tail(&req->list, &fiq->pending);

	if (sync)

		wake_up_sync(&fiq->waitq);

	else

		wake_up(&fiq->waitq);

	kill_fasync(&fiq->fasync, SIGIO, POLL_IN);

}
@@ -368,7 +372,7 @@ static void flush_bg_queue(struct fuse_conn *fc) 
		fc->active_background++;

		spin_lock(&fiq->lock);

		req->in.h.unique = fuse_get_unique(fiq);

		queue_request(fiq, req);

		queue_request(fiq, req, 0);

		spin_unlock(&fiq->lock);

	}

}
@@ -497,7 +501,7 @@ static void __fuse_request_send(struct fuse_conn *fc, struct fuse_req *req) 
		req->out.h.error = -ENOTCONN;

	} else {

		req->in.h.unique = fuse_get_unique(fiq);

		queue_request(fiq, req);

		queue_request(fiq, req, 1);

		/* acquire extra reference, since request is still needed

		   after request_end() */

		__fuse_get_request(req);
@@ -637,7 +641,7 @@ static int fuse_request_send_notify_reply(struct fuse_conn *fc, 
	req->in.h.unique = unique;

	spin_lock(&fiq->lock);

	if (fiq->connected) {

		queue_request(fiq, req);

		queue_request(fiq, req, 0);

		err = 0;

	}

	spin_unlock(&fiq->lock);