From: Sarah Sharp <sarah.a.sharp@linux.intel.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Chris Mason <chris.mason@fusionio.com>,
linux-btrfs@vger.kernel.org, linux-usb@vger.kernel.org,
Hans de Goede <hdegoede@redhat.com>,
linux-scsi@vger.kernel.org
Subject: Re: BTRFS doesn't handle USB device disconnect
Date: Wed, 11 Dec 2013 15:20:05 -0800 [thread overview]
Message-ID: <20131211232005.GA2620@xanatos> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1312111058340.1531-100000@iolanthe.rowland.org>
On Wed, Dec 11, 2013 at 11:03:09AM -0500, Alan Stern wrote:
> On Tue, 10 Dec 2013, Sarah Sharp wrote:
> > On 3.13-rc1, the btrfs partion from the disconnected USB device
> > continues to be listed as mounted. Yanking the cable produces some
> > additional oops messages. It also produced a couple hard-hangs.
> > Unfortunately, I didn't capture the dmesg during the hard-hangs, so I
> > can't tell for sure which driver is to blame (uas, btrfs, or xhci).
>
> Does this happen with usb-storage instead of uas?
>
> What about with ehci-hcd instead of xhci-hcd?
>
> And just to be exotic, what about with dummy-hcd and the uas or
> g_mass_storage gadget driver?
I can't reproduce the hard-hangs (with xhci and uas), but I did manage
to reproduce a bug in uas where the disconnect function hangs, and hangs
the khubd thread as well. This happens even with the btrfs partition
wiped from the drive, so it's not a btrfs issue. I'll send a separate
bug report to Hans.
Sarah Sharp
prev parent reply other threads:[~2013-12-11 23:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20131211011755.GA3574@xanatos>
2013-12-11 16:03 ` BTRFS doesn't handle USB device disconnect Alan Stern
2013-12-11 16:18 ` Hugo Mills
2013-12-11 23:20 ` Sarah Sharp [this message]
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