Re: 'umount' of multi-device volume hangs until the device is physically un-plugged

2012-09-17 Thread Josef Bacik
On Sun, Sep 16, 2012 at 10:07:39PM -0600, Kay Sievers wrote:
 I'm currently playing around with native btrfs multi-device support in
 systemd. There might be a few hotplug issues to solve, here is the
 first one:
 
 A mounted (otherwise unused) multi-device volume (USB multi-slot card
 reader), hangs at:
   $ umount /mnt
 with (fedora) kernel
   3.6.0-0.rc5.git0.1.fc18.x86_64
 
 Any idea what to look for or what to try?
 

Can I see the whole sysrq+w?  Also can you try btrfs-next and see if you have
the same problems?  Thanks,

Josef
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Re: 'umount' of multi-device volume hangs until the device is physically un-plugged

2012-09-17 Thread Kay Sievers
On Mon, Sep 17, 2012 at 7:19 PM, Josef Bacik jba...@fusionio.com wrote:
 On Sun, Sep 16, 2012 at 10:07:39PM -0600, Kay Sievers wrote:
 I'm currently playing around with native btrfs multi-device support in
 systemd. There might be a few hotplug issues to solve, here is the
 first one:

 A mounted (otherwise unused) multi-device volume (USB multi-slot card
 reader), hangs at:
   $ umount /mnt
 with (fedora) kernel
   3.6.0-0.rc5.git0.1.fc18.x86_64

 Any idea what to look for or what to try?

 Can I see the whole sysrq+w?  Also can you try btrfs-next and see if you have
 the same problems?  Thanks,

Hmm, I can't reproduce that today. Nothing really has changes with the
setup. It was easy to reproduce yesterday, even across multiple
reboots.

I'll come back if I see it again. Thanks,
Kay
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