From owner-freebsd-current  Fri Dec 13 12:10:28 2002
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 6191437B401
	for <freebsd-current@FreeBSD.ORG>; Fri, 13 Dec 2002 12:10:27 -0800 (PST)
Received: from rootlabs.com (root.org [67.118.192.226])
	by mx1.FreeBSD.org (Postfix) with SMTP id 0522043EB2
	for <freebsd-current@FreeBSD.ORG>; Fri, 13 Dec 2002 12:10:27 -0800 (PST)
	(envelope-from nate@rootlabs.com)
Received: (qmail 36991 invoked by uid 1000); 13 Dec 2002 20:10:27 -0000
Date: Fri, 13 Dec 2002 12:10:27 -0800 (PST)
From: Nate Lawson <nate@root.org>
To: Lamont Granquist <lamont@scriptkiddie.org>
Cc: "Kenneth D. Merry" <ken@kdm.org>, freebsd-current@FreeBSD.ORG
Subject: Re: ioctl(CAMGETPASSTHRU) hung X11/cda process
In-Reply-To: <20021212232216.U6076-100000@coredump.scriptkiddie.org>
Message-ID: <Pine.BSF.4.21.0212131143040.36866-100000@root.org>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: owner-freebsd-current@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-current.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-current>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-current>
X-Loop: FreeBSD.ORG

On Thu, 12 Dec 2002, Lamont Granquist wrote:
> (kgdb) frame 2
> #2  0xc0140ffc in cam_periph_getccb (periph=0xc41fc080, priority=1)
>     at /usr/src/sys/cam/cam_periph.c:748
> 748     /usr/src/sys/cam/cam_periph.c: No such file or directory.
>         in /usr/src/sys/cam/cam_periph.c
> (kgdb) print *periph
> $11 = {pinfo = {priority = 1, generation = 6, index = 1},
>   periph_start = 0xc0157220 <passstart>,
>   periph_oninval = 0xc0156d70 <passoninvalidate>,
>   periph_dtor = 0xc0156e00 <passcleanup>, periph_name = 0xc049b503 "pass",
>   path = 0xc406dcc0, softc = 0xc41e6000, unit_number = 1,
>   type = CAM_PERIPH_BIO, flags = 0, immediate_priority = 1, refcount = 1,
>   ccb_list = {slh_first = 0x0}, periph_links = {sle_next = 0x0},
> unit_links = {
>     tqe_next = 0x0, tqe_prev = 0xc41cdb40}, deferred_callback = 0,
>   deferred_ac = 0}
> (kgdb)

Ok, this shows that the ccb_list is empty and this is the pass1
device.  The question is "why is the wakeup() never getting called?"
It would help if you did this immediately before running cda and reported
the dmesg:
   camcontrol debug -S -T pass1

Also, add this patch to augment debugging output:

--- /sys/cam/cam_xpt.c  23 Sep 2002 04:55:32 -0000      1.128
+++ /sys/cam/cam_xpt.c  13 Dec 2002 19:49:48 -0000
@@ -3789,6 +3789,7 @@
                         * device queue otherwise we may never get run
                         * again.
                         */
+                       printf("xpt_get_ccb failed, queue hung!\n");
                        break;
                }

-Nate


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message