From: Zwane Mwaikambo <zwane@arm.linux.org.uk>
To: Andrew Morton <akpm@osdl.org>
Cc: Anton Blanchard <anton@samba.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: 2.6.3-rc2-mm1
Date: Thu, 12 Feb 2004 09:40:09 -0500 (EST) [thread overview]
Message-ID: <Pine.LNX.4.58.0402120937460.32441@montezuma.fsmlabs.com> (raw)
In-Reply-To: <20040212040910.3de346d4.akpm@osdl.org>
On Thu, 12 Feb 2004, Andrew Morton wrote:
> Anton Blanchard <anton@samba.org> wrote:
> >
> >
> > > This kernel and also 2.6.3-rc1-mm1 have a nasty bug which causes
> > > current->preempt_count to be decremented by one on each hard IRQ. It
> > > manifests as a BUG() in the slab code early in boot.
> > >
> > > Disabling CONFIG_DEBUG_SPINLOCK_SLEEP will fix this up. Do not use this
> > > feature on ia32, for it is bust.
> >
> > A few questions spring to mind. Like who wrote that dodgy patch?
>
> The dog wrote my homework?
I've not managed to trigger this one
CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_STACKOVERFLOW=y
# CONFIG_DEBUG_SLAB is not set
CONFIG_DEBUG_IOVIRT=y
CONFIG_DEBUG_SPINLOCK=y
CONFIG_DEBUG_PAGEALLOC=y
CONFIG_DEBUG_HIGHMEM=y
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_SPINLOCK_SLEEP=y
> > And any ideas how said person (who will remain nameless) broke ia32?
>
> Not really. I spent a couple of hours debugging the darn thing, then gave
> up and used binary search to find the offending patch.
>
> <looks>
>
> include/asm-i386/hardirq.h:IRQ_EXIT_OFFSET needs treatment, I bet.
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next prev parent reply other threads:[~2004-02-12 14:40 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-12 9:57 2.6.3-rc2-mm1 Andrew Morton
2004-02-12 11:13 ` 2.6.3-rc2-mm1 Andrew Morton
2004-02-12 11:57 ` 2.6.3-rc2-mm1 Anton Blanchard
2004-02-12 12:09 ` 2.6.3-rc2-mm1 Andrew Morton
2004-02-12 14:40 ` Zwane Mwaikambo [this message]
2004-02-12 14:46 ` 2.6.3-rc2-mm1 Anton Blanchard
2004-02-12 14:47 ` 2.6.3-rc2-mm1 Anton Blanchard
2004-02-12 11:24 ` 2.6.3-rc2-mm1 Nick Piggin
2004-02-12 14:46 ` 2.6.3-rc2-mm1 Zwane Mwaikambo
2004-02-12 15:40 ` 2.6.3-rc2-mm1 Mark Haverkamp
2004-02-12 21:38 ` 2.6.3-rc2-mm1 Andrew Morton
2004-02-12 22:33 ` 2.6.3-rc2-mm1 Nick Piggin
2004-02-12 17:06 ` 2.6.3-rc2-mm1 (compile stats) John Cherry
2004-02-12 18:43 ` 2.6.3-rc2-mm1 Alistair John Strachan
2004-02-13 0:04 ` 2.6.3-rc2-mm1 Torrey Hoffman
2004-02-14 10:36 ` 2.6.3-rc2-mm1 Terje Kvernes
2004-02-13 21:04 ` [PATCH 2.6.3-rc2-mm1] Daniel McNeil
2004-02-14 5:27 ` 2.6.3-rc2-mm1 Glenn Johnson
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