From: Bernd Schubert <bschubert@ddn.com>
To: Andi Kleen <andi@halobates.de>
Cc: Bernd Schubert <bs_lists@aakef.fastmail.fm>,
"linux-ext4@vger.kernel.org" <linux-ext4@vger.kernel.org>,
Andreas Dilger <andreas.dilger@oracle.com>
Subject: Re: status of MMP?
Date: Fri, 7 May 2010 17:14:51 +0200 [thread overview]
Message-ID: <4BE42E6B.90405@ddn.com> (raw)
In-Reply-To: <87zl0b21ki.fsf@basil.nowhere.org>
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On 05/07/2010 05:06 PM, Andi Kleen wrote:
> Bernd Schubert <bs_lists@aakef.fastmail.fm> writes:
>
>>
>> Lustres ldiskfs already has MMP support for several years and I would like to
>> know what is the blocker for ext4? Updating the MMP patches for ext4-git
>> should be fairly simple.
>
> AFAIK simply nobody has done the work and submitted it.
>
> Simply adding it would break LVM snapshots though, so there's a
> compatibility issue.
Well, firstly, you are not forced to enable MMP. And then, I don't
understand what should be the issue with MMP. We use snapshots + ldiskfs
+ MMP all the time.
I have a basic understanding how the MMP code works, but not as thorough
as the Orcacle Lustre team. Andreas, would you mind if I post updated
patches here?
Cheers,
Bernd
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next prev parent reply other threads:[~2010-05-07 15:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-05 21:30 status of MMP? Bernd Schubert
2010-05-07 15:06 ` Andi Kleen
2010-05-07 15:14 ` Bernd Schubert [this message]
2010-05-07 19:29 ` Andreas Dilger
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