linux-kernel - Re: [PATCH 8/9] swapfile: swapon randomize if nonrot

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Date:	Tue, 25 Nov 2008 20:38:16 -0700
From:	Matthew Wilcox <matthew@....cx>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Hugh Dickins <hugh@...itas.com>, dwmw2@...radead.org,
	jens.axboe@...cle.com, joern@...fs.org,
	James.Bottomley@...senPartnership.com, djshin90@...il.com,
	teheo@...e.de, linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 8/9] swapfile: swapon randomize if nonrot

On Tue, Nov 25, 2008 at 05:20:39PM -0800, Andrew Morton wrote:
> On Tue, 25 Nov 2008 21:46:56 +0000 (GMT)
> Hugh Dickins <hugh@...itas.com> wrote:
> 
> > But how to get my SD card, accessed by USB card reader, reported as NONROT?
> 
> Dunno.  udev rules, perhaps?

I didn't see patch 8/9, but the 'non-rotating' bit is in word 217 of the
inquiry data.  Unfortunately, Jeff insisted that we only report the
contents of that bit for devices claiming ATA-8 support, which is
ridiculous as even the Intel SSDs only claim conformance to ATA-7.

I notice that Jens was allowed to ignore Jeff's insane requirement and
doesn't have to check ATA revision at all.

-- 
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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