linux-kernel - Re: Linux 2.6.29

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Message-ID: <20090331221335.686a959b@the-village.bc.nu>
Date:	Tue, 31 Mar 2009 22:13:35 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Rik van Riel <riel@...hat.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ric Wheeler <rwheeler@...hat.com>,
	"Andreas T.Auer" <andreas.t.auer_lkml_73537@...us.ath.cx>,
	Theodore Tso <tytso@....edu>, Mark Lord <lkml@....ca>,
	Stefan Richter <stefanr@...6.in-berlin.de>,
	Jeff Garzik <jeff@...zik.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rees <drees76@...il.com>, Jesper Krogh <jesper@...gh.cc>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 2.6.29

> 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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