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

From: Randy Dunlap <rdunlap@infradead.org>
To: Daniel Jordan <daniel.m.jordan@oracle.com>,
	linux-mm@kvack.org, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org
Cc: aarcange@redhat.com, aaron.lu@intel.com,
	akpm@linux-foundation.org, alex.williamson@redhat.com,
	bsd@redhat.com, darrick.wong@oracle.com,
	dave.hansen@linux.intel.com, jgg@mellanox.com,
	jwadams@google.com, jiangshanlai@gmail.com, mhocko@kernel.org,
	mike.kravetz@oracle.com, Pavel.Tatashin@microsoft.com,
	prasad.singamsetty@oracle.com, steven.sistare@oracle.com,
	tim.c.chen@intel.com, tj@kernel.org, vbabka@suse.cz
Subject: Re: [RFC PATCH v4 02/13] ktask: multithread CPU-intensive kernel work
Date: Mon, 5 Nov 2018 12:51:33 -0800	[thread overview]
Message-ID: <736b23a4-cb32-7926-101a-9b6555e59b5e@infradead.org> (raw)
In-Reply-To: <20181105165558.11698-3-daniel.m.jordan@oracle.com>

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.

> +
>  source "kernel/irq/Kconfig"
>  source "kernel/time/Kconfig"
>  source "kernel/Kconfig.preempt"

-- 
~Randy