Re: [GIT PULL] scheduler changes for v4.11

From	Linus Torvalds <torvalds@linux-foundation.org>
Newsgroups	linux.kernel
Subject	Re: [GIT PULL] scheduler changes for v4.11
Date	2017-02-22 21:50 +0100
Message-ID	<tdM1l-7iJ-39@gated-at.bofh.it> (permalink)
References	<tcTey-3lR-11@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Hmm. The scheduler changes seem to show problems with suspend/resume.

I now get his when suspending:

  ...
  Disabling non-boot CPUs ...
  Cannot set affinity for irq 285
  smpboot: CPU 1 is now offline
  ------------[ cut here ]------------
   WARNING: CPU: 2 PID: 25 at kernel/sched/sched.h:812
update_load_avg+0x779/0xa70
  rq->clock_update_flags < RQCF_ACT_SKIP
  ...
  Call Trace:
    update_load_avg+0x779/0xa70
    set_next_entity+0xd9/0x220
    pick_next_task_fair+0x88/0x550
    sched_cpu_dying+0x1cf/0x2a0
    cpuhp_invoke_callback+0x80/0x3b0
    take_cpu_down+0x5e/0xa0
    multi_cpu_stop+0xb6/0xe0

the issue may have been going on for a while, but the new WARN_ON()
was added in this merge window.

(Not sure how consistent this warning is, it definitely doesn't happen
every time, I've only seen it once)

                  Linus

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Re: [GIT PULL] scheduler changes for v4.11 Linus Torvalds <torvalds@linux-foundation.org> - 2017-02-22 21:50 +0100
  Re: [GIT PULL] scheduler changes for v4.11 Matt Fleming <matt@codeblueprint.co.uk> - 2017-02-22 22:00 +0100
    Re: [GIT PULL] scheduler changes for v4.11 Peter Zijlstra <peterz@infradead.org> - 2017-02-22 22:20 +0100
      Re: [GIT PULL] scheduler changes for v4.11 Ingo Molnar <mingo@kernel.org> - 2017-02-24 09:00 +0100

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