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Date: Thu, 8 Oct 2015 14:21:57 -0600 From: Jens Axboe <axboe@...nel.dk> To: Ben Hutchings <ben@...adent.org.uk>, Markus Pargmann <mpa@...gutronix.de> Cc: nbd-general@...ts.sourceforge.net, Michal Belczyk <belczyk@....krakow.pl>, Hermann Lauer <Hermann.Lauer@....uni-heidelberg.de>, linux-kernel@...r.kernel.org Subject: Re: [PATCH] nbd: Add locking for tasks On 10/08/2015 02:14 PM, Ben Hutchings wrote: > On Tue, 2015-10-06 at 20:03 +0200, Markus Pargmann wrote: >> The timeout handling introduced in >> > 7e2893a16d3e (nbd: Fix timeout detection) >> introduces a race condition which may lead to killing of tasks that are >> not in nbd context anymore. This was not observed or reproducable yet. >> >> This patch adds locking to critical use of task_recv and task_send to >> avoid killing tasks that already left the NBD thread functions. This >> lock is only acquired if a timeout occures or the nbd device >> starts/stops. >> >> Reported-by: Ben Hutchings <ben@...adent.org.uk> >> Signed-off-by: Markus Pargmann <mpa@...gutronix.de> > > Reviewed-by: Ben Hutchings <ben@...adent.org.uk> > > You could add 'Fixes: 7e2893a16d3e ("nbd: Fix timeout detection")' to > the commit message as well. I've added your review and the Fixes and added it for this series. Thanks guys. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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