From: Dmitry Torokhov <dtor_core@ameritech.net>
To: linux-kernel@vger.kernel.org
Cc: William Lee Irwin III <wli@holomorphy.com>,
Andrew Morton <akpm@osdl.org>
Subject: Re: 2.6.7-mm6
Date: Wed, 7 Jul 2004 07:47:16 -0500 [thread overview]
Message-ID: <200407070747.16512.dtor_core@ameritech.net> (raw)
In-Reply-To: <20040707063733.GD21066@holomorphy.com>
On Wednesday 07 July 2004 01:37 am, William Lee Irwin III wrote:
> On Wed, Jul 07, 2004 at 12:15:37AM -0500, Dmitry Torokhov wrote:
> > The only suspicious thing that I see is that sunzilog tries to register its
> > serio ports with spinlock held and interrupts off. I wonder if that is what
> > causing a deadlock. Could you please try applying this patch on top of the
> > changes to the drivers/Makefile that I sent earlier.
>
> This suspicion is correct. It boots normally with the patch you posted
> to do that registration outside the interrupts-off critical section
> applied. Bootlog below.
>
Great! I am still somewhat confused why it started locking up with sysfs
patch - even before sunzilog was calling serio_register_port with interrupts
off and serio core was downing it's serio_sem as the very first thing. Since
at the time sunzilog registers its ports no serio drivers have been registered
yet, effectively the only change introduced by sysfs patch is the call to
device_register which takes bus' subsystem rwsem and there really should not
be any congestion.
Maybe rwsems can not be touched with interrupts off? Sparc only? Everywhere?
(I know that you should not normally call functions that may sleep with
interrupts off).
--
Dmitry
next prev parent reply other threads:[~2004-07-07 12:47 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-05 9:31 2.6.7-mm6 Andrew Morton
2004-07-05 10:18 ` 2.6.7-mm6 Christoph Hellwig
2004-07-05 10:44 ` 2.6.7-mm6 Christoph Hellwig
2004-07-05 10:32 ` 2.6.7-mm6 Redeeman
2004-07-05 13:54 ` 2.6.7-mm6 Frieder Buerzele
2004-07-05 14:41 ` 2.6.7-mm6 Redeeman
2004-07-05 10:39 ` 2.6.7-mm6 Martin Zwickel
2004-07-05 19:04 ` 2.6.7-mm6 Jurgen Kramer
2004-07-05 20:38 ` 2.6.7-mm6 - ppc32 inconsistent kallsyms data Joseph Fannin
2004-07-05 20:54 ` Andrew Morton
2004-07-06 2:06 ` Keith Owens
2004-07-06 7:31 ` Keith Owens
2004-07-06 7:43 ` Keith Owens
2004-07-06 20:54 ` Joseph Fannin
2004-07-06 9:09 ` Rusty Russell
2004-07-06 12:28 ` Keith Owens
2004-07-05 22:52 ` 2.6.7-mm6: ALSA: vortex_asXtalkGainsAllChan multiple definitions Adrian Bunk
2004-07-05 22:56 ` [patch] 2.6.7-mm6: let CDROM_PKTCDVD depend on experimental Adrian Bunk
2004-07-06 6:49 ` USB Lockups with 2.6.7-mm6, was Re: 2.6.7-mm6 Ralf Hildebrandt
2004-07-06 12:54 ` 2.6.7-mm6 William Lee Irwin III
2004-07-06 17:51 ` 2.6.7-mm6 Dmitry Torokhov
2004-07-06 18:55 ` 2.6.7-mm6 Jan-Benedict Glaw
2004-07-06 23:12 ` 2.6.7-mm6 William Lee Irwin III
2004-07-06 23:55 ` 2.6.7-mm6 William Lee Irwin III
2004-07-07 5:15 ` 2.6.7-mm6 Dmitry Torokhov
2004-07-07 6:37 ` 2.6.7-mm6 William Lee Irwin III
2004-07-07 12:47 ` Dmitry Torokhov [this message]
2004-07-07 12:55 ` 2.6.7-mm6 William Lee Irwin III
2004-07-07 16:31 ` 2.6.7-mm6 Vojtech Pavlik
2004-07-07 17:15 ` 2.6.7-mm6 Dmitry Torokhov
2004-07-07 19:05 ` 2.6.7-mm6 Vojtech Pavlik
2004-07-06 22:34 ` 2.6.7-mm6 Andrew Morton
2004-07-06 22:45 ` 2.6.7-mm6 David S. Miller
2004-07-06 22:52 ` 2.6.7-mm6 William Lee Irwin III
2004-07-06 23:07 ` 2.6.7-mm6 Russell King
2004-07-06 23:36 ` 2.6.7-mm6 William Lee Irwin III
2004-07-07 0:02 ` 2.6.7-mm6 David S. Miller
2004-07-07 2:29 ` 2.6.7-mm6 Nick Piggin
2004-07-07 7:35 ` 2.6.7-mm6 Ingo Molnar
2004-07-07 21:02 ` 2.6.7-mm6 David S. Miller
2004-07-09 2:45 ` 2.6.7-mm6 Nick Piggin
2004-07-09 2:51 ` 2.6.7-mm6 William Lee Irwin III
2004-07-09 5:09 ` 2.6.7-mm6 Nick Piggin
2004-07-09 6:29 ` 2.6.7-mm6 Ingo Molnar
2004-07-09 6:58 ` 2.6.7-mm6 William Lee Irwin III
2004-07-09 7:07 ` 2.6.7-mm6 Nick Piggin
2004-07-09 7:16 ` 2.6.7-mm6 William Lee Irwin III
2004-07-06 14:49 ` 2.6.7-mm6 - USB problems Jesse Stockall
2004-07-07 16:44 ` 2.6.7-mm6 Jesse Barnes
-- strict thread matches above, loose matches on Subject: below --
2004-07-05 14:41 2.6.7-mm6 Martin Knoblauch
2004-07-06 13:42 2.6.7-mm6 Dmitry Torokhov
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