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

[Tomasz Chmielewski]

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