From: Jeff Garzik <jeff@garzik.org>
To: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Andrew Morton <akpm@osdl.org>,
cmm@us.ibm.com, linux-kernel@vger.kernel.org,
ext2-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 1/5] Forking ext4 filesystem from ext3 filesystem
Date: Thu, 10 Aug 2006 16:13:33 -0400 [thread overview]
Message-ID: <44DB936D.2080909@garzik.org> (raw)
In-Reply-To: <44DB8036.5020706@us.ibm.com>
Badari Pulavarty wrote:
> Andrew Morton wrote:
>> Also, JBD is presently feeding into submit_bh() buffer_heads which
>> span two
>> machine pages, and some device drivers spit the dummy. It'd be better to
>> fix that once, rather than twice..
> Andrew,
>
> I looked at this few days ago. I am not sure how we end up having
> multiple pages (especially,
> why we end up having buffers with bh_size > pagesize) ? Do you know why ?
>
> Easiest fix would be to fix submit_bh() to deal with multiple vecs -
> which is vetoed by
> Jens and I agree with him :(
Yep. The sooner we kill buffer heads and use submit_bio(), the better :)
Jeff
WARNING: multiple messages have this Message-ID (diff)
From: Jeff Garzik <jeff@garzik.org>
To: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Andrew Morton <akpm@osdl.org>,
linux-fsdevel@vger.kernel.org, ext2-devel@lists.sourceforge.net,
cmm@us.ibm.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/5] Forking ext4 filesystem from ext3 filesystem
Date: Thu, 10 Aug 2006 16:13:33 -0400 [thread overview]
Message-ID: <44DB936D.2080909@garzik.org> (raw)
In-Reply-To: <44DB8036.5020706@us.ibm.com>
Badari Pulavarty wrote:
> Andrew Morton wrote:
>> Also, JBD is presently feeding into submit_bh() buffer_heads which
>> span two
>> machine pages, and some device drivers spit the dummy. It'd be better to
>> fix that once, rather than twice..
> Andrew,
>
> I looked at this few days ago. I am not sure how we end up having
> multiple pages (especially,
> why we end up having buffers with bh_size > pagesize) ? Do you know why ?
>
> Easiest fix would be to fix submit_bh() to deal with multiple vecs -
> which is vetoed by
> Jens and I agree with him :(
Yep. The sooner we kill buffer heads and use submit_bio(), the better :)
Jeff
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next prev parent reply other threads:[~2006-08-10 20:14 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-10 1:17 [PATCH 1/5] Forking ext4 filesystem from ext3 filesystem Mingming Cao
2006-08-10 6:39 ` Andrew Morton
2006-08-10 6:39 ` Andrew Morton
2006-08-10 16:41 ` Mingming Cao
2006-08-10 16:41 ` Mingming Cao
2006-08-10 16:48 ` Jörn Engel
2006-08-10 16:48 ` Jörn Engel
2006-08-10 18:18 ` Andrew Morton
2006-08-10 18:18 ` Andrew Morton
2006-08-10 20:22 ` Jeff Garzik
2006-08-10 20:22 ` Jeff Garzik
2006-08-10 20:33 ` Andrew Morton
2006-08-10 20:33 ` Andrew Morton
2006-08-10 20:52 ` Jeff Garzik
2006-08-10 17:44 ` [Ext2-devel] " Theodore Tso
2006-08-10 17:44 ` Theodore Tso
2006-08-10 18:51 ` Badari Pulavarty
2006-08-10 19:23 ` Andrew Morton
2006-08-10 19:23 ` Andrew Morton
2006-08-10 19:36 ` [Ext2-devel] " Dave Kleikamp
2006-08-10 19:36 ` Dave Kleikamp
2006-08-10 19:54 ` [Ext2-devel] " Andrew Morton
2006-08-10 19:54 ` Andrew Morton
2006-08-10 20:12 ` Jeff Garzik
2006-08-10 20:12 ` Jeff Garzik
2006-08-10 20:13 ` Jeff Garzik [this message]
2006-08-10 20:13 ` Jeff Garzik
2006-08-10 20:27 ` Andrew Morton
2006-08-10 20:27 ` Andrew Morton
2006-08-10 21:00 ` Jeff Garzik
2006-08-10 21:00 ` Jeff Garzik
2006-08-10 21:11 ` [Ext2-devel] " Alex Tomas
2006-08-10 21:11 ` Alex Tomas
2006-08-10 22:18 ` [Ext2-devel] " Andrew Morton
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