From: James Bottomley <James.Bottomley@steeleye.com>
To: Anton Blanchard <anton@samba.org>
Cc: Jens Axboe <axboe@suse.de>,
Andrew Vasquez <andrew.vasquez@qlogic.com>,
SCSI Mailing List <linux-scsi@vger.kernel.org>
Subject: Re: PATCH [5/15] qla2xxx: SG tablesize update
Date: 14 Mar 2004 10:55:30 -0500 [thread overview]
Message-ID: <1079279732.2108.40.camel@mulgrave> (raw)
In-Reply-To: <20040314154713.GH19737@krispykreme>
On Sun, 2004-03-14 at 10:47, Anton Blanchard wrote:
> Lets ignore the pci_map_sg problem and assume the qlogic driver did the
> right thing. Whats to stop the upper layers from continually trying to
> queue things when we run out of request slots? If its just sg_tablesize
> then we are stuck with the current compromise (ie set it to something
> reasonably low).
Because on this type of failure, the driver will return
SCSI_MLQUEUE_HOST_BUSY from its queuecommand routine. This will tell
the mid layer not to try any more commands for the entire host until an
outstanding one returns (thus hopefully freeing up enough resources).
James
next prev parent reply other threads:[~2004-03-14 15:55 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-14 8:24 PATCH [5/15] qla2xxx: SG tablesize update Andrew Vasquez
2004-03-14 14:49 ` James Bottomley
2004-03-14 14:51 ` Jens Axboe
2004-03-14 14:59 ` James Bottomley
2004-03-14 15:15 ` Jens Axboe
2004-03-14 15:18 ` Anton Blanchard
2004-03-14 15:31 ` James Bottomley
2004-03-14 15:47 ` Anton Blanchard
2004-03-14 15:55 ` James Bottomley [this message]
2004-03-14 16:01 ` Anton Blanchard
2004-03-14 20:41 ` Jeff Garzik
2004-03-14 22:27 ` James Bottomley
2004-03-15 16:12 ` Jeff Garzik
2004-03-14 20:36 ` Jeff Garzik
2004-03-14 22:31 ` James Bottomley
2004-03-15 16:09 ` Jeff Garzik
-- strict thread matches above, loose matches on Subject: below --
2004-03-15 23:43 Andrew Vasquez
2004-03-16 3:37 ` James Bottomley
2004-03-16 6:40 ` Jeremy Higdon
2004-03-16 11:32 ` Anton Blanchard
2004-03-16 21:49 ` James Bottomley
2004-03-16 22:09 Andrew Vasquez
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