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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Michael Neuling <mikey@neuling.org>,
	Matthew Wilcox <willy@debian.org>,
	linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org,
	Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Subject: Re: [BUG] 2.6.25-rc3-mm1 kernel panic while bootup on powerpc ()
Date: Wed, 05 Mar 2008 19:23:40 +1100	[thread overview]
Message-ID: <1204705420.21545.192.camel@pasglop> (raw)
In-Reply-To: <20080304103350.12d26560.akpm@linux-foundation.org>


On Tue, 2008-03-04 at 10:33 -0800, Andrew Morton wrote:
> > Are we somehow enabling interrupts before we've setup
> ppc_md.get_irq?
> > 
> 
> Yes, we are - it's the semaphore rewrite which is doing this in
> start_kernel().  It's being discussed.
> 
> Enabling interrupts too early on powerpc was discovered to be fatal on
> powerpc years ago.  It looks like that remains the case.

Yes, it is and will probably always be. All that semaphore mucking
around that hard-enables interrupts is just asking for trouble (and on
more than just powerpc... heh, how do you do if your main interrupt
controller hasn't even been initialized yet ?)

Ben.



  reply	other threads:[~2008-03-05  8:30 UTC|newest]

Thread overview: 76+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-04  9:19 2.6.25-rc3-mm1 Andrew Morton
2008-03-04 11:59 ` 2.6.25-rc3-mm1 Cornelia Huck
2008-03-04 19:35   ` 2.6.25-rc3-mm1 Greg KH
2008-03-04 13:12 ` [BUG] 2.6.25-rc3-mm1 kernel panic while bootup on powerpc () Kamalesh Babulal
2008-03-04 14:40   ` Michael Neuling
2008-03-04 18:33     ` Andrew Morton
2008-03-05  8:23       ` Benjamin Herrenschmidt [this message]
2008-03-06  0:03       ` Benjamin Herrenschmidt
2008-03-06  0:44         ` Andrew Morton
2008-03-06  0:52           ` Benjamin Herrenschmidt
2008-03-04 18:36   ` Andrew Morton
2008-03-04 18:47     ` Pekka Enberg
2008-03-04 19:18     ` Pekka Enberg
2008-03-05  8:22   ` Benjamin Herrenschmidt
2008-03-04 16:35 ` 2.6.25-rc3-mm1 (IDE) Randy Dunlap
2008-03-06 21:14   ` Bartlomiej Zolnierkiewicz
2008-03-04 16:45 ` 2.6.25-rc3-mm1 (CCISS) Randy Dunlap
2008-03-04 17:02   ` Miller, Mike (OS Dev)
2008-03-04 17:14     ` Randy Dunlap
2008-03-04 18:14       ` Jens Axboe
2008-03-04 19:12 ` [PATCH 2.6.25-rc3-mm1] fix ext2 borkage Hugh Dickins
2008-03-04 19:20 ` [BUG] 2.6.25-rc3-mm1 kernel bug while running libhugetlbfs Kamalesh Babulal
2008-03-04 19:51   ` Andrew Morton
2008-03-04 22:01     ` Adam Litke
2008-03-05  7:52       ` Kamalesh Babulal
2008-03-04 20:24 ` 2.6.25-rc3-mm1 (wakeup) Randy Dunlap
2008-03-04 22:33   ` Rafael J. Wysocki
2008-03-05  7:40     ` Sam Ravnborg
2008-03-04 21:26 ` 2.6.25-rc3-mm1 (9p docs) Randy Dunlap
2008-03-04 21:43   ` Eric Van Hensbergen
2008-03-05  7:21 ` 2.6.25-rc3-mm1 - PROFILE_LIKELY redux Valdis.Kletnieks
2008-03-05 17:45   ` Andi Kleen
2008-03-05 18:02     ` Andrew Morton
2008-03-05 18:22       ` Andi Kleen
2008-03-05 22:26       ` Valdis.Kletnieks
2008-03-05 23:49         ` Andrew Morton
2008-03-05 19:59     ` Valdis.Kletnieks
2008-03-05 21:56       ` Andi Kleen
2008-03-05 10:51 ` prctl(0x8) -> EINVAL [Was: 2.6.25-rc3-mm1] Jiri Slaby
2008-03-05 10:59   ` Jiri Slaby
2008-03-05 14:06   ` Serge E. Hallyn
2008-03-05 15:18     ` Jiri Slaby
2008-03-09 16:28     ` Andrew Morgan
2008-03-05 13:04 ` 2.6.25-rc3-mm1 Pavel Emelyanov
2008-03-05 13:12   ` 2.6.25-rc3-mm1 (SYSFS=n breaks module engine) Pavel Emelyanov
2008-03-05 13:31   ` 2.6.25-rc3-mm1 Kay Sievers
2008-03-05 13:38     ` 2.6.25-rc3-mm1 Pavel Emelyanov
2008-03-05 13:54       ` 2.6.25-rc3-mm1 Kay Sievers
2008-03-05 14:28         ` 2.6.25-rc3-mm1 Pavel Emelyanov
2008-03-05 16:40   ` 2.6.25-rc3-mm1 Greg KH
2008-03-05 16:59     ` 2.6.25-rc3-mm1 Pavel Emelyanov
2008-03-05 17:07       ` 2.6.25-rc3-mm1 Greg KH
2008-03-05 21:34 ` 2.6.25-rc3-mm1 ppc64 boot hang Badari Pulavarty
2008-03-05 21:54   ` Andrew Morton
2008-03-05 22:35     ` Badari Pulavarty
2008-03-05 23:17     ` Stephen Rothwell
2008-03-07  3:58 ` 2.6.25-rc3-mm1 - BUG at system shutdown time Valdis.Kletnieks
2008-03-07  6:16   ` Andrew Morton
2008-03-07  7:52     ` Valdis.Kletnieks
2008-03-07  8:06       ` Thomas Gleixner
2008-03-07  8:23         ` Valdis.Kletnieks
2008-03-07  8:34           ` Thomas Gleixner
2008-03-07 19:30             ` Valdis.Kletnieks
2008-03-12  7:32   ` Andrew Morton
2008-03-13  2:19     ` Valdis.Kletnieks
2008-03-13  2:32       ` Andrew Morton
2008-03-13  3:57         ` Valdis.Kletnieks
2008-03-13  4:27           ` Andrew Morton
2008-03-14 18:50             ` Valdis.Kletnieks
2008-03-21 13:41       ` Ingo Molnar
2008-03-21 19:38         ` Valdis.Kletnieks
2008-03-21 19:58           ` Ingo Molnar
2008-03-21 20:05             ` Valdis.Kletnieks
2008-03-21 20:12               ` Ingo Molnar
2008-03-22  3:11                 ` Hoo-fscking-ray - (was " Valdis.Kletnieks
2008-03-22 12:09                   ` Ingo Molnar

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