linux-ext4 - Re: [PATCH][RFC] resize2fs and uninit

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Message-ID: <yq1ocp8943k.fsf@sermon.lab.mkp.net>
Date:	Fri, 18 Sep 2009 02:09:03 -0400
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Ric Wheeler <rwheeler@...hat.com>
Cc:	Will Drewry <redpig@...aspill.org>,
	Andreas Dilger <adilger@....com>, linux-ext4@...r.kernel.org
Subject: Re: [PATCH][RFC] resize2fs and uninit_bg questions

>>>>> "Ric" == Ric Wheeler <rwheeler@...hat.com> writes:

Ric> One note - the WRITE_SAME command in SCSI has long been used by
Ric> array vendors to do relatively high performance zero fills.

I've been working on WRITE SAME and UNMAP support recently (layering on
top of Christoph's patch kit).  It might be worthwhile to expose the
WRITE SAME functionality further up the stack.  It could also be helpful
for initializing RAID disks, for instance...

-- 
Martin K. Petersen	Oracle Linux Engineering
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