linux-kernel - Re: [PATCH -V7 2/3] NOT kernel/man2/set_mempolicy.2: Add mode flag MPOL_F_NUMA

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Message-ID: <4c10125a-cbe6-7dff-3b57-c3480e913c5f@gmail.com>
Date:   Fri, 4 Dec 2020 14:25:20 +0100
From:   "Alejandro Colomar (man-pages)" <alx.manpages@...il.com>
To:     Huang Ying <ying.huang@...el.com>
Cc:     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>,
        Peter Zijlstra <peterz@...radead.org>,
        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, Mel Gorman <mgorman@...e.de>
Subject: Re: [PATCH -V7 2/3] NOT kernel/man2/set_mempolicy.2: Add mode flag
 MPOL_F_NUMA_BALANCING

Hi Huang Ying,

Please, see a few fixes below.

Thanks,

Alex

On 12/4/20 10:15 AM, Huang Ying wrote:
> Signed-off-by: "Huang, Ying" <ying.huang@...el.com>
> ---
>  man2/set_mempolicy.2 | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/man2/set_mempolicy.2 b/man2/set_mempolicy.2
> index 68011eecb..fb2e6fd96 100644
> --- a/man2/set_mempolicy.2
> +++ b/man2/set_mempolicy.2
> @@ -113,6 +113,15 @@ A nonempty
>  .I nodemask
>  specifies node IDs that are relative to the set of
>  node IDs allowed by the process's current cpuset.
> +.TP
> +.BR MPOL_F_NUMA_BALANCING " (since Linux 5.11)"
> +When
> +.I mode
> +is MPOL_BIND, enable the Linux kernel NUMA balancing for the task if

.B MPOL_BIND

> +it is supported by kernel.
> +If the flag isn't supported by Linux kernel, or is used with
> +.I mode> +other than MPOL_BIND, return -1 and errno is set to EINVAL.

.BR MPOL_BIND ,

A minus sign should be escaped:
\-1
See man-pages(7)::STYLE GUIDE::Generating optimal glyphs)

.I errno
.BR EINVAL .

>  .PP
>  .I nodemask
>  points to a bit mask of node IDs that contains up to
> @@ -293,6 +302,11 @@ argument specified both
>  .B MPOL_F_STATIC_NODES
>  and
>  .BR MPOL_F_RELATIVE_NODES .
> +Or, the
> +.B MPOL_F_NUMA_BALANCING
> +isn't supported by the Linux kernel, or is used with
> +.I mode
> +other than MPOL_BIND.

.BR MPOL_BIND .

>  .TP
>  .B ENOMEM
>  Insufficient kernel memory was available.
>