Re: "scrub" stops the machine

Re: "scrub" stops the machine

[Helmut Hullen]

Hallo, Arne,

Du meintest am 17.03.12 zum Thema Re: "scrub" stops the machine:

> On 03/17/12 17:35, Helmut Hullen wrote:
>>
>>          btrfs scrub start /mnt/btr
>>
>> and all was dead. Really dead. No access via keybord, no access via
>> SSH.
>>

> what kernel are you using?

As mentioned some hours ago: 3.2.9 (self made).

> Are you by any chance on a 32 bit maschine?

Yes.

Viele Gruesse!
Helmut

Re: "scrub" stops the machine

[Martin Steigerwald]

Am Samstag, 17. M=E4rz 2012 schrieb Helmut Hullen:
> Hallo, Arne,

Hi Helmut, Arne, Chris, hi everyone,

> Du meintest am 17.03.12 zum Thema Re: "scrub" stops the machine:
> > On 03/17/12 17:35, Helmut Hullen wrote:
> >>          btrfs scrub start /mnt/btr
> >>=20
> >> and all was dead. Really dead. No access via keybord, no access vi=
a
> >> SSH.
> >=20
> > what kernel are you using?
>=20
> As mentioned some hours ago: 3.2.9 (self made).
>=20
> > Are you by any chance on a 32 bit maschine?
>=20
> Yes.

Please review the thread I started with subject:

3.2-rc4: scrubbing locks up the kernel, then hung tasks on boot

I had the same issue, but with some recent 3.2 debian kernel it went aw=
ay=20
and then the scrub just hang - process in D state. And a patch from Chr=
is=20
fixed that.

Arne had two patches to test that he thought might fix the lock up hard=
=20
issue, but I didn=B4t need those.

Ciao,
--=20
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7
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Re: "scrub" stops the machine

[Helmut Hullen]

Hallo, Martin,

Du meintest am 17.03.12:

>>>>          btrfs scrub start /mnt/btr
>>>>
>>>> and all was dead. Really dead. No access via keybord, no access
>>>> via SSH.


Kernel 3.2.9

[...]

> Please review the thread I started with subject:

> 3.2-rc4: scrubbing locks up the kernel, then hung tasks on boot

Your system has run for some seconds and has sent messages. My syste  
seems to die immediately after receiving "scrub start".

Viele Gruesse!
Helmut

Re: "scrub" stops the machine

[Martin Steigerwald]

Am Samstag, 17. M=E4rz 2012 schrieb Helmut Hullen:
> Du meintest am 17.03.12:
> >>>>          btrfs scrub start /mnt/btr
> >>>>=20
> >>>> and all was dead. Really dead. No access via keybord, no access
> >>>> via SSH.
>=20
> Kernel 3.2.9
>=20
> [...]
>=20
> > Please review the thread I started with subject:
> >=20
> > 3.2-rc4: scrubbing locks up the kernel, then hung tasks on boot
>=20
> Your system has run for some seconds and has sent messages. My syste
> seems to die immediately after receiving "scrub start".

Initially mine did as well as I wrote in the initial posting.

Then possibly after some kernel upgrade, I did a btrfs filesystem balan=
ce=20
on it and then the scrub didn=B4t die immediately, but got stuck. Did y=
ou=20
try whether a balance works?

Maybe 3.2.10 oder 3.2.11 contains some related fixes? But then I don=B4=
t=20
think that the Debian Wheezy kernel already has 3.2.10 or 3.2.11.

Ciao,
--=20
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7
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Re: "scrub" stops the machine

[Chris Samuel]

[-- Attachment #1: Type: Text/Plain, Size: 459 bytes --]

On Monday 19 March 2012 19:22:58 Martin Steigerwald wrote:

> Maybe 3.2.10 oder 3.2.11 contains some related fixes?

I don't believe that any btrfs fixes get pushed to the stable releases 
(at least, not yet), you'll need 3.3 for newer code.

cheers,
Chris
-- 
 Chris Samuel  :  http://www.csamuel.org/  :  Melbourne, VIC

This email may come with a PGP signature as a file. Do not panic.
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Re: "scrub" stops the machine

[Martin Steigerwald]

Am Montag, 19. M=C3=A4rz 2012 schrieb Chris Samuel:
> On Monday 19 March 2012 19:22:58 Martin Steigerwald wrote:
> > Maybe 3.2.10 oder 3.2.11 contains some related fixes?
>=20
> I don't believe that any btrfs fixes get pushed to the stable release=
s
> (at least, not yet), you'll need 3.3 for newer code.

Well maybe the second btrfs filesystem balance call or a possible upgra=
de=20
of btrfs-tools fixed it for me. Cause I didn=C2=B4t do anything specifi=
c to fix=20
the hard lock up issue. The getting stuck issue Chris Mason fixed by wi=
th=20
casting patch.

Ciao,
--=20
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7
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Re: "scrub" stops the machine

[Helmut Hullen]

Hallo, Martin,

Du meintest am 17.03.12:

>>>>          btrfs scrub start /mnt/btr
>>>>
>>>> and all was dead. Really dead. No access via keybord, no access
>>>> via SSH.

>>> what kernel are you using?

>> As mentioned some hours ago: 3.2.9 (self made).

>>> Are you by any chance on a 32 bit maschine?

>> Yes.


Second try with kernel 3.2.5: same problem.

The system is completely dead.

Viele Gruesse!
Helmut

Re: "scrub" stops the machine

[Chris Samuel]

[-- Attachment #1: Type: Text/Plain, Size: 484 bytes --]

On Sunday 18 March 2012 19:04:00 Helmut Hullen wrote:

> Second try with kernel 3.2.5: same problem.

My understanding is that all 3.2.x versions will have the same btrfs 
code, if you want to try with a newer version you'll need to try the 
3.3 release candidates.

cheers!
Chris
-- 
 Chris Samuel  :  http://www.csamuel.org/  :  Melbourne, VIC

This email may come with a PGP signature as a file. Do not panic.
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"scrub" stops the machine

[Helmut Hullen]

Hallo, linux-btrfs,

next problem ...


I had tested the next possible steps after deleting a partition.

        btrfs device delete /dev/sdb1 /mnt/btr

worked well.

Then

        btrfs scrub start /mnt/btr

and all was dead. Really dead. No access via keybord, no access via SSH.

Restarted the machine, mounted the btrfs bundle, then again

        btrfs scrub start /mnt/btr

and the same reaction. Dead.

No entry in "/var/log/messages", no entry in "/var/log/warn".

Viele Gruesse!
Helmut