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Re: [PATCH v2] scheduler: enhancement to show_state_filter

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: [PATCH v2] scheduler: enhancement to show_state_filter
Date 2017-08-08 10:40 +0200
Message-ID <uc8dr-5nN-5@gated-at.bofh.it> (permalink)
References <uc4Wd-38V-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Tue, Aug 08, 2017 at 08:53:10PM +0800, Yafang Shao wrote:
> Sometimes we want to get tasks in TASK_RUNNING sepcifically,
> instead of dump all tasks.
> For example, when the loadavg are high, we want to dump
> tasks in TASK_RUNNING and TASK_UNINTERRUPTIBLE, which contribute
> to system load. But mostly there're lots of tasks in Sleep state,
> which occupies almost all of the kernel log buffer, even overflows
> it, that causes the useful messages get lost. Although we can
> enlarge the kernel log buffer, but that's not a good idea.
> 
> So I made this change to make the show_state_filter more flexible,
> and then we can dump the tasks in TASK_RUNNING specifically.

It reads like magic and I really don't see the point.

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[PATCH v2] scheduler: enhancement to show_state_filter Yafang Shao <laoar.shao@gmail.com> - 2017-08-08 07:10 +0200
  Re: [PATCH v2] scheduler: enhancement to show_state_filter Peter Zijlstra <peterz@infradead.org> - 2017-08-08 10:40 +0200
    Re: [PATCH v2] scheduler: enhancement to show_state_filter Yafang Shao <laoar.shao@gmail.com> - 2017-08-08 11:00 +0200
      Re: [PATCH v2] scheduler: enhancement to show_state_filter Peter Zijlstra <peterz@infradead.org> - 2017-08-08 12:30 +0200
        Re: [PATCH v2] scheduler: enhancement to show_state_filter Yafang Shao <laoar.shao@gmail.com> - 2017-08-08 12:40 +0200
          Re: [PATCH v2] scheduler: enhancement to show_state_filter Yafang Shao <laoar.shao@gmail.com> - 2017-08-08 13:10 +0200
            Re: [PATCH v2] scheduler: enhancement to show_state_filter Peter Zijlstra <peterz@infradead.org> - 2017-08-08 13:30 +0200
              Re: [PATCH v2] scheduler: enhancement to show_state_filter Yafang Shao <laoar.shao@gmail.com> - 2017-08-08 14:10 +0200
          Re: [PATCH v2] scheduler: enhancement to show_state_filter Peter Zijlstra <peterz@infradead.org> - 2017-08-08 13:10 +0200

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