On Sat, Mar 17, 2012 at 10:43:25AM +0100, Martin Steigerwald wrote:

Hi Greg, Chris, Arne, hi everyone,
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Am Freitag, 16. M=C3=A4rz 2012 schrieb Martin Steigerwald:

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Am Donnerstag, 15. M=C3=A4rz 2012 schrieb Chris Mason:

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On Thu, Mar 15, 2012 at 06:32:19PM +0100, Martin Steigerwald wrot=

e:

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Am Samstag, 25. Februar 2012 schrieb Arne Jansen:

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On 02/24/12 16:51, Martin Steigerwald wrote:

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Am Samstag, 21. Januar 2012 schrieb Martin Steigerwald:

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Am Samstag, 21. Januar 2012 schrieb Martin Steigerwald:

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I still have this with 3.2.0-1-pae - which is a debian ke=

rnel

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based on 3.2.1.
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When I do btrfs scrub start / the machine locks immediate=

ly

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up hard.
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Then usually on next boot it stops on space_cache enabled
message, but not  the one for /, but the one for /home wh=

ich

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is mounted later.

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[=E2=80=A6]
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I now tested scrubbing /home which is a different BTRFS
filesystem on the same machine.
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Then the scrub is started, scrub status tells me so, but
nothing happens, no block in/out activity in vmstat, no CP=

U

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related activity in top.
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btrfs scrub cancel then hangs, but not the complete machin=

e,

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only the process.
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I had this once on my T520 with the internal Intel SSD 320=

 as

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well. The other time it worked.
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Well maybe that is due to BTRFS doing something else on my=

 T23

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now:
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deepdance:~>  ps aux | grep ino-cache | grep -v grep
root      1992  5.5  0.0      0     0 ?        D    12:15 =

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0:09 [btrfs- ino-cache]

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[=E2=80=A6]
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At least it doesn=C2=B4t lock up hard, so there might real=

ly be

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something strange with /.

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FWIW a btrfs filesystem balance / does work. After this a b=

trfs

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scrub start / still locks the kernel.

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Hi Martin,
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I just sent 2 patches to the list. Could you please test if t=

hese

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fix your problem with scrub?

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I didn=C2=B4t yet test it but I tried the first balance then sc=

rub stuff

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again:

Looks like you're on a 32 bit machine.  The current for-linus bra=

nch

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has an important fix for scrub on 32 bit that should solve this.

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So finally - the machine did make-kpkg over night and complained ab=

out

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missing Documentation lguest, then I switched off lots from distro
default config and just did the usual make stuff - I was able to sc=

rub

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both partitions on that ThinkPad T23:
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deepdance:~> btrfs scrub status /
scrub status for 2bf5b1dc-1d89-4f0d-a561-1a5551a27275
        scrub started at Fri Mar 16 11:56:12 2012 and finished afte=

r

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741 seconds total bytes scrubbed: 9.62GB with 0 errors
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deepdance:~> btrfs scrub status /home
scrub status for a600de65-e1ab-4cbf-b150-bbaeaf9fa98d
        scrub started at Fri Mar 16 12:00:31 2012 and finished afte=

r

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1708 seconds total bytes scrubbed: 36.63GB with 0 errors
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Thanks a lot for fixing this.
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Tested-by: Martin Steigerwald <redacted>

[=E2=80=A6]
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Would that patch
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Btrfs: fix casting error in scrub reada code
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http://git.kernel.org/?p=3Dlinux/kernel/git/mason/linux-
btrfs.git;a=3Dcommit;h=3Da175423c831ea582c06784d1e172d2ce1d79923a
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(sorry for line break. KMail insists on it even when I disable line b=

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due to the minus sign in the URL.)
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that I tested above be something for stable?

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read Documentation/stable_kernel_rules.txt
for how to do this properly.

</formletter>
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