From: James Bottomley <James.Bottomley@SteelEye.com>
To: Daniel Phillips <phillips@bonn-fries.net>
Cc: James Bottomley <James.Bottomley@SteelEye.com>,
Jens Axboe <axboe@suse.de>,
linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: Re: [PATCH] queue barrier support
Date: Sat, 16 Feb 2002 10:02:13 -0500 [thread overview]
Message-ID: <200202161502.g1GF2DR01735@localhost.localdomain> (raw)
In-Reply-To: Message from Daniel Phillips <phillips@bonn-fries.net> of "Sat, 16 Feb 2002 11:20:33 +0100." <E16c1xJ-0002qR-00@starship.berlin>
On February 13, 2002 07:26 pm, James Bottomley wrote:
> A problem (that is probably only an issue for older drives) is that while
> technically the standard requires all 3 types of TAG to be supported if tag
> queueing is, some drives really only have simple tag support in their
> firmware, so you may need to add a blacklist for ordered tags on certain
> drives.
phillips@bonn-fries.net said:
> From user space, I hope.
Well, following the current SCSI black/white list procedure, they would be in
the static device_list table in scsi_scan.c, so no.
I agree that it's not a nice or friendly thing (and is certainly prone to
delays when you have to get entries into the actual kernel code), but fixing
this particular annoyance of the scsi subsystem (although I have actually
thought about doing it) would be a project separate from the queue barrier
support.
James
next prev parent reply other threads:[~2002-02-16 15:02 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-13 18:26 [PATCH] queue barrier support James Bottomley
2002-02-15 9:02 ` Jens Axboe
2002-02-15 15:15 ` James Bottomley
2002-02-15 16:28 ` Chris Mason
2002-02-15 16:51 ` James Bottomley
2002-02-15 17:17 ` Chris Mason
2002-02-15 17:48 ` James Bottomley
2002-02-15 22:30 ` Matthias Andree
2002-02-15 17:09 ` James Bottomley
2002-02-15 16:43 ` Mike Anderson
2002-02-15 13:41 ` Chris Mason
2002-02-16 10:20 ` Daniel Phillips
2002-02-16 15:02 ` James Bottomley [this message]
2002-02-25 20:55 ` 929-Emulex, ABTS Command Anamoly! Cindy Sweet
2002-02-25 21:02 ` arjan
-- strict thread matches above, loose matches on Subject: below --
2002-02-13 12:51 [PATCH] queue barrier support Jens Axboe
2002-02-13 13:09 ` Martin Dalecki
2002-02-13 13:13 ` Jens Axboe
2002-02-13 14:36 ` Martin Dalecki
2002-02-13 14:41 ` Jens Axboe
2002-02-13 14:51 ` Daniel Phillips
2002-02-13 15:18 ` Jens Axboe
2002-02-13 17:47 ` Andreas Dilger
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