linux-kernel - Re: blkdev_issue_discard() hangs forever if the underlying storage device is removed

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Message-ID: <CAO+b5-rL=ucZ-2bA9Qj-RfWbJzGasDBQMLF_4XX2xzC28YECBg@mail.gmail.com>
Date:	Tue, 27 Sep 2011 19:57:14 +0200
From:	Bart Van Assche <bvanassche@....org>
To:	Dave Chinner <david@...morbit.com>
Cc:	Lukas Czerner <lczerner@...hat.com>,
	Jens Axboe <jaxboe@...ionio.com>,
	Mike Snitzer <snitzer@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: blkdev_issue_discard() hangs forever if the underlying storage
 device is removed

On Tue, Aug 30, 2011 at 4:01 AM, Dave Chinner <david@...morbit.com> wrote:
> The underlying block device driver is supposed to handle timing out
> of lost IOs and causing them to be completed with an error.
> blkdev_issue_discard() is simply waiting for that error to be
> delivered.

Hi Dave,

You're probably right that it's not a block layer issue. This patch
fixed it for me: http://marc.info/?l=linux-scsi&m=131680195721932&w=2

Bart.
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