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Re: thousands of kworker processes with 4.7.x and 4.8-rc*

From Tomasz Chmielewski <mangoo@wpkg.org>
Newsgroups linux.kernel
Subject Re: thousands of kworker processes with 4.7.x and 4.8-rc*
Date 2016-09-23 18:20 +0200
Message-ID <skBmF-69k-3@gated-at.bofh.it> (permalink)
References <sj11T-2o5-11@gated-at.bofh.it> <skyIa-4aO-17@gated-at.bofh.it> <skzuy-4Kq-9@gated-at.bofh.it>
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On 2016-09-23 23:10, Mike Galbraith wrote:

>> I did some experiments to see when the problem first appeared. 
>> Thousands
>> of kworker processes start to show up in 4.7.0-rc5.
>> 
>> kernel version | kworker count after boot
>> -------------------------------------------
>> 4.6.3 > 	>         37
>> 4.6.4 > 	>         47
>> 4.6.5 > 	>         46
>> 4.6.6 > 	>         49
>> 4.6.7 > 	>         49
>> 4.7.0-rc1 > 	> 46
>> 4.7.0-rc2 > 	> 49
>> 4.7.0-rc3> 	> 45
>> 4.7.0-rc4> 	> 47
>> 4.7.0-rc5> 	> 1592
> 
> Best bet would be to use 'git bisect' to locate the exact commit that
> caused this, and post the bisection result along with your config.
> 
> AFAIK, nobody else is seeing this, is the kernel virgin source?

Yes, it's a kernel.org kernel.

I found some similar reports, though without much more info:

https://github.com/zfsonlinux/zfs/issues/5036 - kernel 4.7.2, initially 
attributed to ZFS on Linux, but then reproduced without ZFS

https://github.com/systemd/systemd/issues/4069 - kernel 4.7.2


I'll try to bisect.



Tomasz Chmielewski
https://lxadm.com

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Thread

thousands of kworker processes with 4.7.x and 4.8-rc* Tomasz Chmielewski <mangoo@wpkg.org> - 2016-09-19 09:20 +0200
  Re: thousands of kworker processes with 4.7.x and 4.8-rc* Tomasz Chmielewski <mangoo@wpkg.org> - 2016-09-23 15:30 +0200
    Re: thousands of kworker processes with 4.7.x and 4.8-rc* Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-09-23 16:20 +0200
      Re: thousands of kworker processes with 4.7.x and 4.8-rc* Tomasz Chmielewski <mangoo@wpkg.org> - 2016-09-23 18:20 +0200
        Re: thousands of kworker processes with 4.7.x and 4.8-rc* Tomasz Chmielewski <mangoo@wpkg.org> - 2016-09-25 14:50 +0200
          Re: thousands of kworker processes with 4.7.x and 4.8-rc* Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-09-25 19:30 +0200
            Re: thousands of kworker processes with 4.7.x and 4.8-rc* Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-09-25 20:30 +0200
          Re: thousands of kworker processes with 4.7.x and 4.8-rc* Nikolay Borisov <n.borisov.lkml@gmail.com> - 2016-09-25 21:10 +0200
            Re: thousands of kworker processes with 4.7.x and 4.8-rc* Tomasz Chmielewski <mangoo@wpkg.org> - 2016-09-27 06:00 +0200

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