From: Mike Fedyk <mfedyk@matchmail.com>
To: Neil Conway <nconway.list@ukaea.org.uk>
Cc: vda@port.imtp.ilyichevsk.odessa.ua,
Martin Dalecki <dalecki@evision-ventures.com>,
Anton Altaparmakov <aia21@cantab.net>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Russell King <rmk@arm.linux.org.uk>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] 2.5.15 IDE 61
Date: Fri, 17 May 2002 00:07:50 -0700 [thread overview]
Message-ID: <20020517070750.GD627@matchmail.com> (raw)
In-Reply-To: <E177dYp-00083c-00@the-village.bc.nu> <5.1.0.14.2.20020514202811.01fcc1d0@pop.cus.cam.ac.uk> <3CE22B2B.5080506@evision-ventures.com> <200205151138.g4FBcGY13110@Port.imtp.ilyichevsk.odessa.ua> <3CE24CB9.8DFC5821@ukaea.org.uk>
On Wed, May 15, 2002 at 12:55:37PM +0100, Neil Conway wrote:
> You can (and must) safely "touch the cable" in between TCQ commands in
> the right circumstances. You are therefore touching the cable while the
> hwgroup is busy, hence my suggestion that the flag we use to prevent
> touching the cable during DMA should be named something other than busy.
>
Ahh, but with TCQ the concept of busy changes. The wire (simplified) is
only busy when the tags are being transfered, otherwise the cable is unused
unless the cable has been "locked" by one of the devices.
next prev parent reply other threads:[~2002-05-17 7:08 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-14 9:49 [PATCH] 2.5.15 IDE 61 Neil Conway
2002-05-14 8:52 ` Martin Dalecki
2002-05-14 10:12 ` Neil Conway
2002-05-14 9:30 ` Martin Dalecki
2002-05-14 11:10 ` Neil Conway
2002-05-14 10:21 ` Martin Dalecki
2002-05-14 11:38 ` Russell King
2002-05-14 10:49 ` Martin Dalecki
2002-05-14 12:10 ` Alan Cox
2002-05-14 11:11 ` Martin Dalecki
2002-05-14 12:47 ` Alan Cox
2002-05-14 12:30 ` Martin Dalecki
2002-05-15 14:43 ` Pavel Machek
2002-05-14 12:00 ` Russell King
2002-05-14 11:03 ` Martin Dalecki
2002-05-14 13:03 ` Neil Conway
2002-05-14 13:27 ` Andre Hedrick
2002-05-14 14:45 ` Alan Cox
2002-05-14 14:30 ` Martin Dalecki
2002-05-14 16:20 ` Neil Conway
2002-05-14 16:32 ` Jens Axboe
2002-05-14 16:47 ` Neil Conway
2002-05-14 16:51 ` Jens Axboe
2002-05-15 11:37 ` Neil Conway
2002-05-14 22:51 ` Mike Fedyk
2002-05-14 16:26 ` Jens Axboe
2002-05-14 19:34 ` Anton Altaparmakov
2002-05-15 6:16 ` Jens Axboe
2002-05-15 8:32 ` Anton Altaparmakov
2002-05-15 9:42 ` Martin Dalecki
2002-05-15 9:32 ` Martin Dalecki
2002-05-15 11:44 ` Neil Conway
2002-05-15 11:02 ` Martin Dalecki
2002-05-15 13:10 ` Alan Cox
2002-05-15 13:34 ` Neil Conway
2002-05-15 13:04 ` Martin Dalecki
2002-05-15 14:08 ` benh
2002-05-15 16:40 ` Denis Vlasenko
2002-05-15 11:55 ` Neil Conway
2002-05-17 7:07 ` Mike Fedyk [this message]
2002-05-17 11:06 ` Neil Conway
2002-05-17 10:12 ` Martin Dalecki
2002-05-14 16:03 ` Neil Conway
2002-05-14 16:46 ` Alan Cox
2002-05-14 12:52 ` Daniela Engert
-- strict thread matches above, loose matches on Subject: below --
2002-05-06 3:53 Linux-2.5.14 Linus Torvalds
2002-05-13 9:48 ` [PATCH] 2.5.15 IDE 61 Martin Dalecki
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