Date: Tue, 31 Mar 2009 22:13:35 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Rik van Riel <riel@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
       Ric Wheeler <rwheeler@redhat.com>,
       "Andreas T.Auer" <andreas.t.auer_lkml_73537@ursus.ath.cx>,
       Theodore Tso <tytso@mit.edu>, Mark Lord <lkml@rtr.ca>,
       Stefan Richter <stefanr@s5r6.in-berlin.de>,
       Jeff Garzik <jeff@garzik.org>, Matthew Garrett <mjg59@srcf.ucam.org>,
       Andrew Morton <akpm@linux-foundation.org>,
       David Rees <drees76@gmail.com>, Jesper Krogh <jesper@krogh.cc>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Linux 2.6.29
Message-ID: <20090331221335.686a959b@the-village.bc.nu>
In-Reply-To: <49D11BDD.70702@redhat.com>
References: <alpine.LFD.2.00.0903271511230.3994@localhost.localdomain>
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	<49CE3F74.6090103@rtr.ca>
	<20090329231451.GR26138@disturbed>
	<20090330003948.GA13356@mit.edu>
	<49D0710A.1030805@ursus.ath.cx>
	<20090330100546.51907bd2@the-village.bc.nu>
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> No argument there.  I have seen NCQ starvation on SATA disks,
> with some requests sitting in the drive for seconds, while
> the drive was busy handling hundreds of requests/second
> elsewhere...

The really sad thing about that one is that the SCSI vendors had this
problem over ten years ago with TCQ - and fixed it in the drives.

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