From: Oliver Neukum <oliver@neukum.org>
To: James Bottomley <James.Bottomley@SteelEye.com>
Cc: Mark Lord <lsml@rtr.ca>, Anton Blanchard <anton@samba.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
SCSI Mailing List <linux-scsi@vger.kernel.org>
Subject: Re: Core scsi layer crashes in 2.6.8.1
Date: Tue, 5 Oct 2004 18:01:03 +0200 [thread overview]
Message-ID: <200410051801.03677.oliver@neukum.org> (raw)
In-Reply-To: <1096991666.2064.25.camel@mulgrave>
Am Dienstag, 5. Oktober 2004 17:54 schrieb James Bottomley:
> On Tue, 2004-10-05 at 10:49, Oliver Neukum wrote:
> > Then let the driver tell the upper layers whether the device is still
> > connected or not.
>
> Do we have to go over this again?
>
> It would add quite a bit of complexity to the reference counted
> aynchronous model to try and force synchronicity between queuecommand
> and scsi_remove_host in the mid-layer. Therefore it's much easier to
> let the LLD decide what to do with the command.
Why is it in any way difficult to decide whether to issue a command in the
first place? The command is generated upon being notified by the lower layer.
There is no issue of synchronisation here. It is simply stupid to give
commands that are bound to fail, if the information is already available.
Regards
Oliver
next prev parent reply other threads:[~2004-10-05 16:19 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-28 20:03 Core scsi layer crashes in 2.6.8.1 Alan Cox
2004-09-29 14:11 ` James Bottomley
2004-09-29 13:24 ` Alan Cox
2004-09-29 14:34 ` James Bottomley
2004-09-29 14:27 ` Matthew Wilcox
2004-10-05 11:49 ` Anton Blanchard
2004-10-05 13:56 ` James Bottomley
2004-10-05 14:44 ` Mark Lord
2004-10-05 14:56 ` James Bottomley
2004-10-05 15:46 ` Mark Lord
2004-10-05 15:49 ` Oliver Neukum
2004-10-05 15:54 ` James Bottomley
2004-10-05 15:57 ` Mark Lord
2004-10-05 16:01 ` James Bottomley
2004-10-05 16:53 ` Jeff Garzik
2004-10-05 16:01 ` Oliver Neukum [this message]
2004-10-05 16:07 ` James Bottomley
2004-10-05 16:26 ` Oliver Neukum
2004-10-05 16:38 ` James Bottomley
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