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From: Alex Tomas <alex@clusterfs.com>
To: Badari Pulavarty <pbadari@us.ibm.com>
Cc: suparna@in.ibm.com, ext2-devel@lists.sourceforge.net,
	linux-fsdevel@vger.kernel.org, alex@clusterfs.com
Subject: Re: [Ext2-devel] Reviewing ext3 improvement patches (delalloc, mballoc, extents)
Date: Fri, 4 Mar 2005 14:30:36 +0300	[thread overview]
Message-ID: <20050304143036.1da01187.alex@clusterfs.com> (raw)
In-Reply-To: <1109898734.4961.11.camel@dyn318077bld.beaverton.ibm.com>

On 03 Mar 2005 17:12:14 -0800
Badari Pulavarty <pbadari@us.ibm.com> wrote:

> Just doing delayed allocation without multiblock allocation
> (with the current layout) is not really a useful thing, IMHO.
> We will benifit few cases, but in general - we moved the
> block allocation overhead from prepare write to writepages/writepage
> time. There is a little benifit of not doing journaling twice etc..
> but I don't think it would be enough to justify the effort. 
> Isn't it ?

one more goodness - if file gets truncated soon, no allocation is needed at all

> One more thing, we need to keep in mind is - we need to make sure
> that "ordered" mode also improved - since all our testcode 
> focuses on "writeback" mode and the default mode is "ordered" :(

working on that.

thanks, Alex
 

  parent reply	other threads:[~2005-03-04 11:32 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-03-03  8:33 Reviewing ext3 improvement patches (delalloc, mballoc, extents) Suparna Bhattacharya
2005-03-03  9:40 ` Andreas Dilger
2005-03-03 22:10   ` Theodore Ts'o
2005-03-03 22:30     ` Alex Tomas
2005-03-04 11:13   ` Suparna Bhattacharya
2005-03-04 12:29     ` Alex Tomas
2005-03-04 18:25       ` [Ext2-devel] " Andreas Dilger
2005-03-04  1:12 ` [Ext2-devel] " Badari Pulavarty
2005-03-04  1:46   ` Mingming Cao
2005-03-04  3:26     ` Suparna Bhattacharya
2005-03-14  8:36     ` Werner Almesberger
2005-03-14  9:04       ` Suparna Bhattacharya
2005-03-14 15:02         ` Werner Almesberger
2005-03-14 15:43           ` Alex Tomas
2005-03-14 16:37             ` [Ext2-devel] " Werner Almesberger
2005-03-14 17:13               ` Alex Tomas
2005-03-15  0:28                 ` Werner Almesberger
2005-03-14 22:23               ` Bryan Henderson
2005-03-15  0:42                 ` Werner Almesberger
2005-03-15 21:59                   ` Bryan Henderson
2005-03-04 11:30   ` Alex Tomas [this message]
2005-03-04 15:02   ` [Ext2-devel] " Alex Tomas
2005-03-13 14:41     ` Delayed alloc for ordered-mode Suparna Bhattacharya
2005-03-13 19:32       ` Badari Pulavarty

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