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Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support IRQ stack

From Jungseok Lee <jungseoklee85@gmail.com>
Newsgroups linux.kernel
Subject Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support IRQ stack
Date 2015-10-15 16:30 +0200
Message-ID <qjRHz-AM-5@gated-at.bofh.it> (permalink)
References <qgYPf-kO-17@gated-at.bofh.it> <qgYPf-kO-15@gated-at.bofh.it> <qhGQi-4IM-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Oct 9, 2015, at 11:24 PM, James Morse wrote:

Hi James,

[ ... ]

> I think unwind_frame() needs to walk the irq stack too. [2] is an example
> of perf tracing back to userspace, (and there are patches on the list to
> do/fix this), so we need to walk back to the start of the first stack for
> the perf accounting to be correct.

I plan to do re-spin this series without [PATCH 2/2] since 1) Akashi's
approach looks better than mine and 2) you have the perf patches for [2].
This would help us to move forward.

Thoughts?

[ ... ]

> [0] sudo ./perf record -e mem:<address of __do_softirq()>:x -ag -- sleep 10
> [1] sudo ./perf report --call-graph --stdio
> [2] http://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html

Best Regards
Jungseok Lee
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[PATCH v4 2/2] arm64: Expand the stack trace feature to support IRQ stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-10-07 17:30 +0200
  Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support  IRQ stack James Morse <james.morse@arm.com> - 2015-10-09 16:30 +0200
    Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support IRQ stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-10-12 17:00 +0200
      Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support  IRQ stack James Morse <james.morse@arm.com> - 2015-10-12 18:40 +0200
        Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support IRQ stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-10-13 00:20 +0200
          Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support  IRQ stack James Morse <james.morse@arm.com> - 2015-10-13 13:10 +0200
            Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support IRQ stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-10-13 17:10 +0200
              Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support IRQ stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-10-14 14:20 +0200
                Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support  IRQ stack James Morse <james.morse@arm.com> - 2015-10-15 18:10 +0200
                Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support IRQ stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-10-16 15:10 +0200
                Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support  IRQ stack Catalin Marinas <catalin.marinas@arm.com> - 2015-10-16 18:10 +0200
                Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support IRQ stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-10-17 15:40 +0200
    Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support  IRQ stack AKASHI Takahiro <takahiro.akashi@linaro.org> - 2015-10-14 09:20 +0200
      Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support IRQ stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-10-14 14:30 +0200
        Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support IRQ stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-10-14 15:00 +0200
          Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support  IRQ stack AKASHI Takahiro <takahiro.akashi@linaro.org> - 2015-10-15 06:30 +0200
            Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support IRQ stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-10-15 15:40 +0200
    Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support IRQ stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-10-15 16:30 +0200
      Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support  IRQ stack James Morse <james.morse@arm.com> - 2015-10-15 18:10 +0200
        Re: [PATCH v4 2/2] arm64: Expand the stack trace feature to support IRQ stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-10-16 15:10 +0200

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