* (un)mounting takes a long time
@ 2013-08-11 13:44 Florian Lindner
2013-08-12 13:50 ` Josef Bacik
0 siblings, 1 reply; 3+ messages in thread
From: Florian Lindner @ 2013-08-11 13:44 UTC (permalink / raw)
To: linux-btrfs
Hello!
I'm using ArchLinux with kernel Linux horus 3.10.5-1-ARCH #1 SMP PREEMPT.
Mounting and unmounting takes a long time:
# time mount -v /mnt/Archiv
mount: /dev/sde1 mounted on /mnt/Archiv.
mount -v /mnt/Archiv 0,00s user 0,16s system 1% cpu 9,493 total
# sync && time umount -v /mnt/Archiv
umount: /mnt/Archiv (/dev/sdd1) unmounted
umount -v /mnt/Archiv 0,00s user 0,33s system 1% cpu 23,247 total
fstab:
LABEL=Archiv /mnt/Archiv btrfs defaults,compress=zlib
0 0
Archiv is a RAID 0 comprised of two discs:
Label: 'Archiv' uuid: b2504193-efeb-4ef3-8797-a8d73536a416
Total devices 2 FS bytes used 1.99TB
devid 2 size 2.73TB used 1023.01GB path /dev/sde1
devid 1 size 2.73TB used 1023.03GB path /dev/sdd1
Are un(mounting) times like these normal?
Regards,
Florian
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: (un)mounting takes a long time
2013-08-11 13:44 (un)mounting takes a long time Florian Lindner
@ 2013-08-12 13:50 ` Josef Bacik
2013-08-14 11:47 ` Florian Lindner
0 siblings, 1 reply; 3+ messages in thread
From: Josef Bacik @ 2013-08-12 13:50 UTC (permalink / raw)
To: Florian Lindner; +Cc: linux-btrfs
On Sun, Aug 11, 2013 at 03:44:10PM +0200, Florian Lindner wrote:
> Hello!
>
> I'm using ArchLinux with kernel Linux horus 3.10.5-1-ARCH #1 SMP PREEMPT.
> Mounting and unmounting takes a long time:
>
> # time mount -v /mnt/Archiv
> mount: /dev/sde1 mounted on /mnt/Archiv.
> mount -v /mnt/Archiv 0,00s user 0,16s system 1% cpu 9,493 total
>
> # sync && time umount -v /mnt/Archiv
> umount: /mnt/Archiv (/dev/sdd1) unmounted
> umount -v /mnt/Archiv 0,00s user 0,33s system 1% cpu 23,247 total
>
> fstab:
>
> LABEL=Archiv /mnt/Archiv btrfs defaults,compress=zlib
> 0 0
>
> Archiv is a RAID 0 comprised of two discs:
>
> Label: 'Archiv' uuid: b2504193-efeb-4ef3-8797-a8d73536a416
> Total devices 2 FS bytes used 1.99TB
> devid 2 size 2.73TB used 1023.01GB path /dev/sde1
> devid 1 size 2.73TB used 1023.03GB path /dev/sdd1
>
> Are un(mounting) times like these normal?
Are you using -o space_cache? If not can you add that and mount/umount a couple
of times to get the cache built up and see if that helps. If you are using
space cache then sysrq+w while its taking forever to unmount and create a
bugzilla at bugzilla.kernel.org (make sure the component is set to btrfs) so I
can take a look at it. Thanks,
Josef
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: (un)mounting takes a long time
2013-08-12 13:50 ` Josef Bacik
@ 2013-08-14 11:47 ` Florian Lindner
0 siblings, 0 replies; 3+ messages in thread
From: Florian Lindner @ 2013-08-14 11:47 UTC (permalink / raw)
To: Josef Bacik; +Cc: Florian Lindner, linux-btrfs
Am Montag, 12. August 2013, 09:50:16 schrieb Josef Bacik:
> On Sun, Aug 11, 2013 at 03:44:10PM +0200, Florian Lindner wrote:
> > Hello!
> >
> > I'm using ArchLinux with kernel Linux horus 3.10.5-1-ARCH #1 SMP PREEMPT.
> > Mounting and unmounting takes a long time:
> >
> > # time mount -v /mnt/Archiv
> > mount: /dev/sde1 mounted on /mnt/Archiv.
> > mount -v /mnt/Archiv 0,00s user 0,16s system 1% cpu 9,493 total
> >
> > # sync && time umount -v /mnt/Archiv
> > umount: /mnt/Archiv (/dev/sdd1) unmounted
> > umount -v /mnt/Archiv 0,00s user 0,33s system 1% cpu 23,247 total
> >
> > fstab:
> >
> > LABEL=Archiv /mnt/Archiv btrfs
> > defaults,compress=zlib 0 0
> >
> > Archiv is a RAID 0 comprised of two discs:
> >
> > Label: 'Archiv' uuid: b2504193-efeb-4ef3-8797-a8d73536a416
> >
> > Total devices 2 FS bytes used 1.99TB
> > devid 2 size 2.73TB used 1023.01GB path /dev/sde1
> > devid 1 size 2.73TB used 1023.03GB path /dev/sdd1
> >
> > Are un(mounting) times like these normal?
>
> Are you using -o space_cache? If not can you add that and mount/umount a
> couple of times to get the cache built up and see if that helps.
Yes, I'm using space_cache (not explicitly, seems to be the default). I reboot
my machine regularly, so there is frequent mount/unmount acitivity,
> If you
> are using space cache then sysrq+w while its taking forever to unmount and
> create a bugzilla at bugzilla.kernel.org (make sure the component is set to
> btrfs) so I can take a look at it. Thanks,
https://bugzilla.kernel.org/show_bug.cgi?id=60743
Thanks!
Florian
^ permalink raw reply [flat|nested] 3+ messages in thread
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2013-08-11 13:44 (un)mounting takes a long time Florian Lindner
2013-08-12 13:50 ` Josef Bacik
2013-08-14 11:47 ` Florian Lindner
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