From: Dan Streetman Date: Thu, 14 Jan 2016 18:42:32 +0000 (-0500) Subject: nbd: ratelimit error msgs after socket close X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=da6ccaaa79caca4f38b540b651238f87215217a2;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git nbd: ratelimit error msgs after socket close Make the "Attempted send on closed socket" error messages generated in nbd_request_handler() ratelimited. When the nbd socket is shutdown, the nbd_request_handler() function emits an error message for every request remaining in its queue. If the queue is large, this will spam a large amount of messages to the log. There's no need for a separate error message for each request, so this patch ratelimits it. In the specific case this was found, the system was virtual and the error messages were logged to the serial port, which overwhelmed it. Fixes: 4d48a542b427 ("nbd: fix I/O hang on disconnected nbds") Signed-off-by: Dan Streetman Signed-off-by: Markus Pargmann --- diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index b67500d5b338..4c5d94146aa3 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -580,8 +580,8 @@ static void nbd_request_handler(struct request_queue *q) req, req->cmd_type); if (unlikely(!nbd->sock)) { - dev_err(disk_to_dev(nbd->disk), - "Attempted send on closed socket\n"); + dev_err_ratelimited(disk_to_dev(nbd->disk), + "Attempted send on closed socket\n"); req->errors++; nbd_end_request(nbd, req); spin_lock_irq(q->queue_lock);