linux-kernel - Re: [BUG] 2.6.25-rc3-mm1 kernel panic while bootup on powerpc ()

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 05 Mar 2008 19:23:40 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Michael Neuling <mikey@...ling.org>,
	Matthew Wilcox <willy@...ian.org>, linuxppc-dev@...abs.org,
	linux-kernel@...r.kernel.org,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
Subject: Re: [BUG] 2.6.25-rc3-mm1 kernel panic while bootup on powerpc ()


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.


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/