From: Markus Pargmann <mpa@pengutronix.de>
To: Dan Streetman <dan.streetman@canonical.com>
Cc: Jens Axboe <axboe@fb.com>,
nbd-general@lists.sourceforge.net, linux-kernel@vger.kernel.org,
Dan Streetman <ddstreet@ieee.org>
Subject: Re: [PATCH] nbd: ratelimit error msgs after socket close
Date: Fri, 05 Feb 2016 08:59:50 +0100 [thread overview]
Message-ID: <2208458.aFMEtyXXuv@adelgunde> (raw)
In-Reply-To: <CAOZ2QJMqBH36-+2RYS+XkqP3VrLzd1w57wAAC5SLu533H9aS-g@mail.gmail.com>
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Hi Dan,
On Tuesday, February 02, 2016 12:07:04 PM Dan Streetman wrote:
> Hi Markus,
>
> just checking if you had any comments on this patch?
>
> On Thu, Jan 14, 2016 at 1:42 PM, Dan Streetman
> <dan.streetman@canonical.com> wrote:
> > 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 <dan.streetman@canonical.com>
Sorry for the delay. I applied the patch.
Thanks,
Markus
> > ---
> > drivers/block/nbd.c | 4 ++--
> > 1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
> > index e4c5cc1..c65d41f 100644
> > --- a/drivers/block/nbd.c
> > +++ b/drivers/block/nbd.c
> > @@ -618,8 +618,8 @@ 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);
> > --
> > 2.5.0
> >
>
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prev parent reply other threads:[~2016-02-05 8:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-14 18:42 [PATCH] nbd: ratelimit error msgs after socket close Dan Streetman
2016-02-02 17:07 ` Dan Streetman
2016-02-05 7:59 ` Markus Pargmann [this message]
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