linux-kernel - Re: [PATCH 6/7] block: allow large discard requests

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Message-ID: <20090830025022.GE22870@parisc-linux.org>
Date:	Sat, 29 Aug 2009 20:50:22 -0600
From:	Matthew Wilcox <matthew@....cx>
To:	Mark Lord <liml@....ca>
Cc:	Christoph Hellwig <hch@...radead.org>, linux-scsi@...r.kernel.org,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	jens.axboe@...cle.com, dwmw2@...radead.org
Subject: Re: [PATCH 6/7] block: allow large discard requests

On Sat, Aug 29, 2009 at 10:49:02PM -0400, Mark Lord wrote:
> Pardon my cursory review, but I don't see where this
> patch set allows for more than a single extent/range
> of sectors per TRIM command.

It doesn't.

> If it still does not group many extents into a single TRIM,
> then it will be far to slow to be useful at all for SATA.

That depends on the firmware.  I do have plans to group the extents,
but let's get something working before making it quick.

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
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