linux-kernel - Re: [RFC PATCH v4 02/13] ktask: multithread CPU-intensive kernel work

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Message-ID: <20181106022451.jry6nty6zsnpwq5e@ca-dmjordan1.us.oracle.com>
Date:   Mon, 5 Nov 2018 18:24:51 -0800
From:   Daniel Jordan <daniel.m.jordan@...cle.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Daniel Jordan <daniel.m.jordan@...cle.com>, linux-mm@...ck.org,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        aarcange@...hat.com, aaron.lu@...el.com, akpm@...ux-foundation.org,
        alex.williamson@...hat.com, bsd@...hat.com,
        darrick.wong@...cle.com, dave.hansen@...ux.intel.com,
        jgg@...lanox.com, jwadams@...gle.com, jiangshanlai@...il.com,
        mhocko@...nel.org, mike.kravetz@...cle.com,
        Pavel.Tatashin@...rosoft.com, prasad.singamsetty@...cle.com,
        steven.sistare@...cle.com, tim.c.chen@...el.com, tj@...nel.org,
        vbabka@...e.cz
Subject: Re: [RFC PATCH v4 02/13] ktask: multithread CPU-intensive kernel work

On Mon, Nov 05, 2018 at 12:51:33PM -0800, Randy Dunlap wrote:
> On 11/5/18 8:55 AM, Daniel Jordan wrote:
> > diff --git a/init/Kconfig b/init/Kconfig
> > index 41583f468cb4..ed82f76ed0b7 100644
> > --- a/init/Kconfig
> > +++ b/init/Kconfig
> > @@ -346,6 +346,17 @@ config AUDIT_TREE
> >  	depends on AUDITSYSCALL
> >  	select FSNOTIFY
> >  
> > +config KTASK
> > +	bool "Multithread CPU-intensive kernel work"
> > +	depends on SMP
> > +	default y
> > +	help
> > +	  Parallelize CPU-intensive kernel work.  This feature is designed for
> > +          big machines that can take advantage of their extra CPUs to speed up
> > +	  large kernel tasks.  When enabled, kworker threads may occupy more
> > +          CPU time during these kernel tasks, but these threads are throttled
> > +          when other tasks on the system need CPU time.
> 
> Use tab + 2 spaces consistently for help text indentation, please.

Ok, will do.  Thanks for pointing it out.