linux-kernel - Re: [PATCH -V6 RESEND 3/3] NOT kernel/numactl: Support to enable Linux kernel NUMA balancing

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Date:   Wed, 2 Dec 2020 11:45:33 +0000
From:   Mel Gorman <mgorman@...e.de>
To:     Huang Ying <ying.huang@...el.com>
Cc:     Peter Zijlstra <peterz@...radead.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Rafael Aquini <aquini@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Ingo Molnar <mingo@...hat.com>,
        Rik van Riel <riel@...riel.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Michal Hocko <mhocko@...e.com>,
        David Rientjes <rientjes@...gle.com>, linux-api@...r.kernel.org
Subject: Re: [PATCH -V6 RESEND 3/3] NOT kernel/numactl: Support to enable
 Linux kernel NUMA balancing

On Wed, Dec 02, 2020 at 04:42:34PM +0800, Huang Ying wrote:
> A new API: numa_set_membind_balancing() is added to libnuma.  It is
> same as numa_set_membind() except that the Linux kernel NUMA balancing
> will be enabled for the task if the feature is supported by the
> kernel.
> 
> At the same time, a new option: --balancing (-b) is added to numactl.
> Which can be used before the memory policy options in the command
> line.  With it, the Linux kernel NUMA balancing will be enabled for
> the process if the feature is supported by the kernel.
> 
> Signed-off-by: "Huang, Ying" <ying.huang@...el.com>
> index f3bb22b..109dd8f 100644
> --- a/numactl.8
> +++ b/numactl.8
> @@ -25,6 +25,8 @@ numactl \- Control NUMA policy for processes or shared memory
>  [
>  .B \-\-all
>  ] [
> +.B \-\-balancing
> +] [

--balancing is a bit vague, maybe --balance-bind? The intent is to hint
that it's specific to MPOL_BIND at this time.

-- 
Mel Gorman
SUSE Labs