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Date:	Tue, 14 Nov 2006 09:15:06 +0100
From:	Pierre Ossman <>
To:	Jens Axboe <>
Subject: Re: How to cleanly shut down a block device

Jens Axboe wrote:
> There is no helper to kill already queued requests when a device is
> removed, if you look at SCSI you'll see that it handles this "manually"
> as well in the request_fn handler. So you'll need a "device dead or
> gone" check in your request_fn handler, and do it from there.

Is there some part of the current infrastructure I can use to determine
this. If del_gendisk() grabs the queue lock (and hence is "safe" wrt the
request handler), then perhaps there is a test that can be done to test
if the disk has been deleted?


     -- Pierre Ossman

  Linux kernel, MMC maintainer
  PulseAudio, core developer
  rdesktop, core developer

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