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From: Alex Tomas <bzzz@Sun.COM>
To: Alberto Bertogli <albertito@blitiri.com.ar>
Cc: Shyam_Iyer@Dell.com, dm-devel@redhat.com,
	linux-ext4@vger.kernel.org, tytso@MIT.EDU,
	linux-kernel@vger.kernel.org
Subject: Re: [dm-devel] Re: jbd2 inside a device mapper module
Date: Tue, 30 Dec 2008 09:55:57 +0300	[thread overview]
Message-ID: <4959C5FD.3050305@sun.com> (raw)
In-Reply-To: <20081229210537.GN4127@blitiri.com.ar>

one good thing about JBD is that you can't update target block and csum
atomically. so, either you use some form of COW or you use journalling.
given we already have JBD it'd make sense to use it?

thanks, Alex

Alberto Bertogli wrote:
> I think I'll go with the "two metadatas" approach and see how it goes.
> Worst case scenario is that I have to drop that code, which means to be
> back where I am now, only with one less option.
> 
> Thanks,
> 		Alberto
> 


  reply	other threads:[~2008-12-30  7:09 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20081224211038.GT4127@blitiri.com.ar>
2008-12-24 22:38 ` jbd2 inside a device mapper module Alberto Bertogli
     [not found] ` <20081224234915.GA23723@mit.edu>
2008-12-25 14:35   ` Alberto Bertogli
2008-12-25 15:52     ` Theodore Tso
2008-12-26  0:00       ` Alberto Bertogli
2008-12-26  3:37         ` Theodore Tso
2008-12-26 16:17           ` Alberto Bertogli
2008-12-26 18:06             ` Theodore Tso
2008-12-27  3:00               ` Alberto Bertogli
2008-12-27 19:29                 ` Theodore Tso
2008-12-29 21:30                   ` Alberto Bertogli
2008-12-27 20:01     ` Andreas Dilger
     [not found]       ` <46A00B48CC54E4468EF6911F877AC4CA01DDBB66@blrx3m10.blr.amer.dell.com>
2008-12-29 21:05         ` [dm-devel] " Alberto Bertogli
2008-12-30  6:55           ` Alex Tomas [this message]
2008-12-30 13:51             ` Alberto Bertogli

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