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Date: Thu, 19 May 2011 00:02:55 +0800 From: Américo Wang <xiyou.wangcong@...il.com> To: Milton Miller <miltonm@....com> Cc: Stevie Trujillo <stevie.trujillo@...il.com>, linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org, netdev@...r.kernel.org Subject: Re: How to get backtrace? modprobe -r iwlagn; modprobe iwlagn kills kernel On Wed, May 18, 2011 at 11:55 PM, Milton Miller <miltonm@....com> wrote: > On Wed May 18 2011 about 10:37:54 EST, Stevie Trujillo wrote: >> I'm having some problem getting a backtrace. When I do "modprobe -r >> iwlagn; modprobe iwlagn" (2.6.38.6 with Intel-1030N) the kernel crashes >> (sometimes I need to try 2 or 3 times, and sometimes the modprobe -r >> is the one that crashes). >> >> This spams my monitor with several oops/panics before it finally >> dies. I can only see bottom of the last one, which probably isn't >> very meaningful. I tried loading netconsole, but I only get one or >> two lines before it stops sending/printing. >> >> I then tried kexec+crashkernel, but I only managed to get a backtrace >> for the last panic (which I think is just a result of memory corruption >> or something). Finally I tried compiling ramoops into my kernel, >> but it didn't want to load because of "No such device". > > For the kexec+crashkernel, try to retrieve the kernel log buffer: > There is a utility in kexec-tools, named vmcore-dmesg, which is supposed to do this kind of thing. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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