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

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Message-ID: <4AB37248.4050309@redhat.com>
Date:	Fri, 18 Sep 2009 07:43:04 -0400
From:	Ric Wheeler <rwheeler@...hat.com>
To:	"Martin K. Petersen" <martin.petersen@...cle.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

On 09/18/2009 02:09 AM, Martin K. Petersen wrote:
>>>>>> "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...
>
>    

Using it to initialize RAID disks is exactly what it is there for - that 
sounds quite useful...

ric

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