linux-ext4 - Re: [Bug 101011] Kernel Oops when disconnecting a mounted ext4 usb stick

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Message-ID: <20150816133800.GC3825@thunk.org>
Date:	Sun, 16 Aug 2015 09:38:00 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Christoph Hellwig <hch@....de>
Cc:	bugzilla-daemon@...zilla.kernel.org, linux-scsi@...r.kernel.org,
	linux-ext4@...r.kernel.org, Tejun Heo <tj@...nel.org>
Subject: Re: [Bug 101011] Kernel Oops when disconnecting a mounted ext4 usb
 stick

On Sat, Aug 15, 2015 at 10:19:02AM +0200, Christoph Hellwig wrote:
> 
> sorry for the delay - I saw the mail Jan Cc'ed me on yesterday.  After
> my changes it should not go away and I had tested the original eject
> test that it indeed didn't.  Either I forgot a case, or the major
> writeback Tejun did a little later regressed it.
> 
> As I won't have time to look into it ASAP I'd suggest to revert my
> patch for now.  In the long run I really don't want to have these
> checks spread over file system so I plan to look into it once I
> get a few spare hours.

Thanks, I'll revert the patch.

I suspect we should add an ioctl to simulate a USB device unplug using
the loopback block device, so we can add a test to xfstests.

    	     	   	      	     	 - Ted
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