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Re: [PATCH] random: Fix kernel panic due to system_wq use before init

From Linus Torvalds <torvalds@linux-foundation.org>
Newsgroups linux.kernel
Subject Re: [PATCH] random: Fix kernel panic due to system_wq use before init
Date 2016-09-14 21:20 +0200
Message-ID <shnSV-4Oc-13@gated-at.bofh.it> (permalink)
References <shnJg-4KO-9@gated-at.bofh.it> <shnSV-4Oc-15@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Wed, Sep 14, 2016 at 12:14 PM, Waiman Long <waiman.long@hpe.com> wrote:
>
> In the stack backtrace above, the kernel hadn't even reached SMP boot after
> about 50s. That was extremely slow. I tried the 4.7.3 kernel and it booted
> up fine. So I suspect that there may be too many interrupts going on and it
> consumes most of the CPU cycles. The prime suspect is the random driver, I
> think.

Any chance of bisecting it at least partially? The random driver
doesn't do interrupts itself, it just gets called by other drivers
doing intterrupts. So if there are too many of them, that would be
something else..

               Linus

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Thread

[PATCH] random: Fix kernel panic due to system_wq use before init Waiman Long <Waiman.Long@hpe.com> - 2016-09-14 21:10 +0200
  Re: [PATCH] random: Fix kernel panic due to system_wq use before init Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-14 21:20 +0200
    Re: [PATCH] random: Fix kernel panic due to system_wq use before init Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-14 23:10 +0200
    Re: [PATCH] random: Fix kernel panic due to system_wq use before init Matt Fleming <matt@codeblueprint.co.uk> - 2016-09-19 11:30 +0200
    Re: [PATCH] random: Fix kernel panic due to system_wq use before init Matt Fleming <matt@codeblueprint.co.uk> - 2016-09-19 14:50 +0200
      Re: [PATCH] random: Fix kernel panic due to system_wq use before init Matt Fleming <matt@codeblueprint.co.uk> - 2016-09-19 17:00 +0200
        Re: [PATCH] random: Fix kernel panic due to system_wq use before init Matt Fleming <matt@codeblueprint.co.uk> - 2016-09-20 16:10 +0200
  Re: [PATCH] random: Fix kernel panic due to system_wq use before init Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-14 21:20 +0200
    Re: [PATCH] random: Fix kernel panic due to system_wq use before init Tejun Heo <tj@kernel.org> - 2016-09-14 22:00 +0200
      Re: [PATCH] random: Fix kernel panic due to system_wq use before init Tejun Heo <tj@kernel.org> - 2016-09-15 00:30 +0200

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