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Re: kern/52147: deadlock when booting from USB disk

The following reply was made to PR kern/52147; it has been noted by GNATS.

From: Michael van Elst <>
To: Christos Zoulas <>
Subject: Re: kern/52147: deadlock when booting from USB disk
Date: Thu, 13 Apr 2017 00:00:19 +0200

 On Wed, Apr 12, 2017 at 08:25:18AM -0400, Christos Zoulas wrote:
 > But hasn't the bad MODE SENSE been fixed now? I.e. the code was changed
 > back not to do MODE SENSE? Or do we need the notion of "root is currently
 > being mounted"?
 AFAIK the code has been changed to be quiet in case of an error. That
 solves the issue as far as it is created by the MODE SENSE command.
 But I think any other SCSI error would trigger the same problem.
                                 Michael van Elst
                                 "A potential Snark may lurk in every tree."

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