linux-ext4 - Re: Metadata reservation for unwritten extent conversionjkj

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Message-ID: <alpine.LFD.2.00.1303140736430.18319@dhcp-1-104.brq.redhat.com>
Date:	Thu, 14 Mar 2013 07:38:13 +0100 (CET)
From:	Lukáš Czerner <lczerner@...hat.com>
To:	"Theodore Ts'o" <tytso@....edu>
cc:	Lukáš Czerner <lczerner@...hat.com>,
	linux-ext4@...r.kernel.org
Subject: Re: Metadata reservation for unwritten extent conversionjkj

On Wed, 13 Mar 2013, Theodore Ts'o wrote:

> Date: Wed, 13 Mar 2013 23:21:18 -0400
> From: Theodore Ts'o <tytso@....edu>
> To: Lukáš Czerner <lczerner@...hat.com>
> Cc: linux-ext4@...r.kernel.org
> Subject: Re: Metadata reservation for unwritten extent conversion
> 
> On Wed, Mar 13, 2013 at 06:31:25PM +0100, Lukáš Czerner wrote:
> > > That sounds like the best thing to do.  I assume you will be simply
> > > taking the da_reserve_metadata() function introduced in the
> > > to-be-dropped commit:
> > > 
> > > > ext4: Reserve metadata if writing into uninitialized
> > > 
> > > ... and moving it into the "reserve metadata block for every delayed
> > > write" patch?
> 
> I wnated to kick off some testing tonight, so I've made this change to
> the git tree.  So the new version of "reserve metadata block for every
> delayed write" is here:
> 
> https://git.kernel.org/cgit/linux/kernel/git/tytso/ext4.git/commit/?h=dev&id=c7cf7abbf754f16b78a8b9641d06baac6be60524
> 
> ... and the dev branch has been modified to drop the "reserve metadata
> if writing into unitialized.." commit.
> 
> 						- Ted

Great, thanks. It was quite late yesterday so I have not had time to
actually send the patch, sorry.

I'll send it today just for the "record-keeping" :)

Thanks!
-Lukas