From: Jens Axboe <axboe@suse.de>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: "Justin T. Gibbs" <gibbs@scsiguy.com>,
James Bottomley <James.Bottomley@SteelEye.com>,
SCSI Mailing List <linux-scsi@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH] Fix aic7xxx del_timer_sync() deadlock
Date: Sun, 29 Feb 2004 10:13:50 +0100 [thread overview]
Message-ID: <20040229091350.GC3149@suse.de> (raw)
In-Reply-To: <4041292C.3090700@pobox.com>
On Sat, Feb 28 2004, Jeff Garzik wrote:
> Jens Axboe wrote:
> >The only nasty right now is that you cannot unconditionally call
> >blk_stop_queue(), it requires a manual blk_start_queue() on io
> >completion which will only happen if io is pending of course. I just got
> >an idea on how to do that properly, I'll make sure it works in any case.
>
> hmmm... I thought the model was to call blk_stop_queue() when you can
> accept no more requests, and call blk_start_queue() once you can start
> accepting more requests.
>
> That would imply that blk_start_queue() is OK when there is no more I/O
> pending...
That is the model. The problem is that you don't have an opportunitty to
call blk_start_queue() if there's no more IO pending (you typicall do it
from io completion). There's no problem with doing that.
--
Jens Axboe
next prev parent reply other threads:[~2004-02-29 9:14 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-27 18:26 [PATCH] Fix aic7xxx del_timer_sync() deadlock James Bottomley
2004-02-27 19:23 ` Justin T. Gibbs
2004-02-27 19:34 ` James Bottomley
2004-02-27 20:50 ` Justin T. Gibbs
2004-02-28 15:39 ` James Bottomley
2004-02-29 19:26 ` Justin T. Gibbs
2004-02-29 21:10 ` James Bottomley
2004-02-29 22:23 ` Justin T. Gibbs
2004-02-29 21:25 ` James Bottomley
2004-02-28 2:40 ` Jeff Garzik
2004-02-28 9:25 ` Jens Axboe
2004-02-28 23:50 ` Jeff Garzik
2004-02-29 9:13 ` Jens Axboe [this message]
2004-02-29 16:21 ` Jeff Garzik
2004-02-29 16:39 ` Jens Axboe
2004-02-29 17:28 ` Jeff Garzik
2004-02-29 17:55 ` Jens Axboe
2004-02-29 18:57 ` Justin T. Gibbs
2004-02-29 19:00 ` Jeff Garzik
2004-02-29 19:28 ` Justin T. Gibbs
2004-02-29 19:37 ` Jeff Garzik
2004-02-29 19:42 ` Justin T. Gibbs
2004-02-29 19:44 ` Jeff Garzik
2004-02-29 20:06 ` Jens Axboe
2004-02-29 20:20 ` Jeff Garzik
2004-02-29 20:27 ` Jens Axboe
2004-02-29 20:28 ` Jeff Garzik
2004-02-29 19:43 ` Jeff Garzik
2004-02-29 20:04 ` Jens Axboe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20040229091350.GC3149@suse.de \
--to=axboe@suse.de \
--cc=James.Bottomley@SteelEye.com \
--cc=akpm@osdl.org \
--cc=gibbs@scsiguy.com \
--cc=jgarzik@pobox.com \
--cc=linux-scsi@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.