Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <9ba3577b-0098-86da-ff2e-636cb5a8ae1a@bytedance.com>
Date:   Thu, 27 Apr 2023 13:17:52 +0800
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0)
 Gecko/20100101 Thunderbird/102.10.0
Subject: Re: [PATCH v6 0/2] sched/numa: add per-process numa_balancing
Content-Language: en-US
To:     Peter Zijlstra <peterz@infradead.org>,
        John Hubbard <jhubbard@nvidia.com>,
        Bagas Sanjaya <bagasdotme@gmail.com>,
        Mel Gorman <mgorman@suse.de>
Cc:     linux-api@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org,
        John Hubbard <jhubbard@nvidia.com>,
        Jonathan Corbet <corbet@lwn.net>,
        Ingo Molnar <mingo@redhat.com>,
        Juri Lelli <juri.lelli@redhat.com>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Dietmar Eggemann <dietmar.eggemann@arm.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
        Daniel Bristot de Oliveira <bristot@redhat.com>,
        Valentin Schneider <vschneid@redhat.com>
References: <20230412140701.58337-1-ligang.bdlg@bytedance.com>
From:   Gang Li <ligang.bdlg@bytedance.com>
In-Reply-To: <20230412140701.58337-1-ligang.bdlg@bytedance.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Precedence: bulk

Hi,

Looks like there are no objections or comments. Do you have any ideas?

Can we merge this patch in the next merge window.

Thanks!

On 2023/4/12 22:06, Gang Li wrote:
> # Introduce
> Add PR_NUMA_BALANCING in prctl.
> 
> A large number of page faults will cause performance loss when numa
> balancing is performing. Thus those processes which care about worst-case
> performance need numa balancing disabled. Others, on the contrary, allow a
> temporary performance loss in exchange for higher average performance, so
> enable numa balancing is better for them.
> 
> Numa balancing can only be controlled globally by
> /proc/sys/kernel/numa_balancing. Due to the above case, we want to
> disable/enable numa_balancing per-process instead.
>