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Message-ID: <19f34abd0807110800o5b283f00n4be7449ed3b06e5a@mail.gmail.com>
Date: Fri, 11 Jul 2008 17:00:42 +0200
From: "Vegard Nossum" <vegard.nossum@gmail.com>
To: "=?UTF-8?Q?T=C3=B6r=C3=B6k_Edwin?=" <edwintorok@gmail.com>
Subject: Re: today's linux-next fails to boot
Cc: "Ingo Molnar" <mingo@elte.hu>, "Takashi Iwai" <tiwai@suse.de>,
       linux-next@vger.kernel.org,
       "Linux Kernel" <linux-kernel@vger.kernel.org>
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> On Fri, Jul 11, 2008 at 4:48 PM, Török Edwin <edwintorok@gmail.com> wrote:>>> One really simple way of getting some more info out of this is to take>>> the EIP value (here c0181ca0) and run it through addr2line:>>>>>>     $ addr2line -e vmlinux -i c0181ca0>>>> Thanks for the hint, I rebuilt a failing kernel, and this is what>> addr2line says:>>>> $ addr2line -e vmlinux -i c0181ca0>>>> ??:0>> $ addr2line -e vmlinux -f c0181ca0>> kmem_cache_alloc>> ??:0
BTW, did the new kernel fail in exactly the same place? If not, youshould also replace the EIP in the new crash report on the addr2linecommand line, so in general: addr2line -e vmlinux -f -i <EIP here>.
(I don't think it really makes sense for the kernel to crash inkmem_cache_alloc() this early in the boot process, so I'm guessing youhave a different EIP.)
(Also don't rebuild a bad kernel just to try this out again, but ifyou happen to run across another bad one for example during bisection,you can try it then.)

Vegard
-- "The animistic metaphor of the bug that maliciously sneaked in whilethe programmer was not looking is intellectually dishonest as itdisguises that the error is the programmer's own creation."	-- E. W. Dijkstra, EWD1036????{.n?+???????+%?????ݶ??w??{.n?+????{??G?????{ay?ʇڙ?,j??f???h?????????z_??(?階?ݢj"???m??????G????????????&???~???iO???z??v?^?m????????????I?