Re: [PATCH v2 1/2] arm64: revamp unwind_frame for interrupt stack

From	Jungseok Lee <jungseoklee85@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 1/2] arm64: revamp unwind_frame for interrupt stack
Date	2015-10-21 14:20 +0200
Message-ID	<qm0x3-2Fy-15@gated-at.bofh.it> (permalink)
References	<qlA9A-6df-13@gated-at.bofh.it> <qlA9A-6df-23@gated-at.bofh.it> <qlF9h-4YG-45@gated-at.bofh.it> <qlVe1-3hD-3@gated-at.bofh.it> <qm0x3-2Fy-17@gated-at.bofh.it>
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On Oct 21, 2015, at 9:14 PM, Jungseok Lee wrote:

Whoops!

> [Only Akashi and James]
> 
> On Oct 21, 2015, at 3:38 PM, AKASHI Takahiro wrote:
> 
> Hi Akashi and James,
> 
> Am I the only person who have experienced kernel panic with this series?
> I have observed NULL pointer kernel panic with the following two ways.
> 
> - $ sudo echo c > /proc/sysrq-trigger
> - perf record -e mem:[address of do_softirq]:x -ag -- sleep 2
> 
> The kernel panic is triggered when the last stack frame of swapper is unwound.
> At that time, the value of fp, low, high is 0, 0, 0, respectively.
> 
> My tree includes "Synchronise dump_backtrace() with perf call chain" patch
> which is queued into for-next/core.
> 
> Best Regards
> Jungseok Lee

Really sorry for the noise.. It won't happen again..

Best Regards
Jungseok Lee--
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Thread

[PATCH v2 1/2] arm64: revamp unwind_frame for interrupt stack AKASHI Takahiro <takahiro.akashi@linaro.org> - 2015-10-20 10:10 +0200
  Re: [PATCH v2 1/2] arm64: revamp unwind_frame for interrupt stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-10-20 15:30 +0200
    Re: [PATCH v2 1/2] arm64: revamp unwind_frame for interrupt stack AKASHI Takahiro <takahiro.akashi@linaro.org> - 2015-10-21 08:40 +0200
      Re: [PATCH v2 1/2] arm64: revamp unwind_frame for interrupt stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-10-21 14:20 +0200
      Re: [PATCH v2 1/2] arm64: revamp unwind_frame for interrupt stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-10-21 14:20 +0200

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