Subject: Re: [vserver] barrier problem
From: Nikolay Kichukov <hijacker@oldum.net>
Date: Thu, 14 Oct 2010 14:17:48 +0300

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Hi all,

It seems the problem was that the reiserfs filesystem was mounted without explicitly
enabling xattrs. As Bertl explained
on IRC:

"<Bertl> i.e. the attributes are cached as long as the inode stays in memory"

thus we could see the barrier enabled until umount/reboot.

So mounting it with attrs resolved the issue on latest kernel + patest patch + latest
utils.

Cheers,
- -Nik



On 10/05/2010 04:51 PM, Chuck wrote:
> On Tuesday, October 05, 2010, Nikolay Kichukov wrote:
>> Hi Chuck,
>> I am running 2.6.33.2-vs2.3.0.36.30.4 with 0.30.216-pre2864; Jan 22 2010, 10:53:15
and 
> all my guests are on reiserfs
>> type reiserfs (rw,tag) .
>>
>>
>> I actually never checked if the barrier existed after a reboot. So there you go:
>>
>> showattr -a vservers/
>> ----buicX ./vservers
>>
>> The barrier is gone. So I could reproduce this.
>>
> 
> thank  you.. i thought i was going crazy and did something stupid. unfortunately I
cannot 
> take time these next few months to engage testing as Herbert suggested due to my current

> work schedule (insane). thankfully i dont have to reboot these more than once or twice
a 
> year. hopefully someone will engage testing to see what causes this.
> 
> 
> 
>> Cheers,
>> -Nik
>> On 09/29/2010 09:25 PM, Chuck wrote:
>>> On Wednesday, September 29, 2010, Daniel Hokka Zakrisson wrote:
>>>> Chuck wrote:
>>>>> i have not experienced this before. every time i reboot the barrier attribute
on
>>> /vservers
>>>>> goes away and has to be reset.
>>>>>
>>>>>
>>>>> i have noatime,attrs set in fstab.
>>>>>
>>>>> the kernel and utilities versions are:
>>>>>
>>>>> 2.6.35-vs2.3.0.36.31-gentoo
>>>>>
>>>>> util-vserver-0.30.216_pre2910
>>>>>
>>>>> any clues?
>>>>
>>>> What filesystem?
>>>>
>>>
>>> oops.. sorry forgot.. reiserfs, the filesystem we use everywhere. it is the first
time
>>> though using the newer versions of kernel and utilities.
>>>
>>>> --
>>>> Daniel Hokka Zakrisson
>>>>
>>>
>>>
>>
> 
> 
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