linux-kernel - Re: [PATCH] libata-sff: fix 32-bit PIO regression

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Message-ID: <Pine.LNX.4.64.0902091016520.14410@blonde.anvils>
Date:	Mon, 9 Feb 2009 10:22:04 +0000 (GMT)
From:	Hugh Dickins <hugh@...itas.com>
To:	Sergei Shtylyov <sshtylyov@...mvista.com>
cc:	jgarzik@...ox.com, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org, alan@...rguk.ukuu.org.uk, rjw@...k.pl
Subject: Re: [PATCH] libata-sff: fix 32-bit PIO regression

On Mon, 9 Feb 2009, Sergei Shtylyov wrote:
> Hugh Dickins wrote:
> 
> > Yes, looks nice, and works for me.  My only criticism would be,
> > minor issue unchanged by your patch, that actually "slop" isn't
> > unlikely enough to deserve an "unlikely" - slop of 1 or 3 is
> > unlikely, but slop of 2 is quite common.
> 
>  Common on what types of ATAPI commands? I can hardly believe that they are
> common on the block I/O...

When I checked (mounting and listing a CD), about 34% of
commands had slop 2.  But you're right, now I try copying
a large file, there's no slop involved in that at all.

Hugh
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