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;
Date:   Thu, 25 Aug 2022 09:20:43 -0400
From:   Johannes Weiner <hannes@cmpxchg.org>
To:     Chengming Zhou <zhouchengming@bytedance.com>
Cc:     tj@kernel.org, mkoutny@suse.com, surenb@google.com,
        gregkh@linuxfoundation.org, corbet@lwn.net, mingo@redhat.com,
        peterz@infradead.org, songmuchun@bytedance.com,
        cgroups@vger.kernel.org, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 10/10] sched/psi: per-cgroup PSI accounting
 disable/re-enable interface
Message-ID: <Ywd3K1+5blotUEtU@cmpxchg.org>
References: <20220824081829.33748-1-zhouchengming@bytedance.com>
 <20220824081829.33748-11-zhouchengming@bytedance.com>
 <YwX2jC2UQ/zeY2E8@cmpxchg.org>
 <324b1d0f-42e5-8947-68cb-a3d20135f2c6@bytedance.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <324b1d0f-42e5-8947-68cb-a3d20135f2c6@bytedance.com>
Precedence: bulk

On Thu, Aug 25, 2022 at 08:28:39PM +0800, Chengming Zhou wrote:
> On 2022/8/24 17:59, Johannes Weiner wrote:
> > Hi Chengming,
> > 
> > Thanks for incorporating all the feedback. I have a few nitpicks
> > below, but with those considered, please add:
> > 
> > Acked-by: Johannes Weiner <hannes@cmpxchg.org>
> > 
> > On Wed, Aug 24, 2022 at 04:18:29PM +0800, Chengming Zhou wrote:
> >> @@ -5171,12 +5220,19 @@ static struct cftype cgroup_base_files[] = {
> >>  	{
> >>  		.name = "irq.pressure",
> >>  		.flags = CFTYPE_PRESSURE,
> >> +		.file_offset = offsetof(struct cgroup, psi_files[PSI_IRQ]),
> >>  		.seq_show = cgroup_irq_pressure_show,
> >>  		.write = cgroup_irq_pressure_write,
> >>  		.poll = cgroup_pressure_poll,
> >>  		.release = cgroup_pressure_release,
> >>  	},
> >>  #endif
> >> +	{
> >> +		.name = "cgroup.pressure",
> >> +		.flags = CFTYPE_PRESSURE,
> >> +		.seq_show = cgroup_psi_show,
> >> +		.write = cgroup_psi_write,
> > 
> > To match the naming convention, these should be called
> > cgroup_pressure_show() and cgroup_pressure_write().
> 
> I just find cgroup_pressure_write() already exists, so I change the names
> to cgroup_pressure_enable_show() and cgroup_pressure_enable_write(),
> since this file name is simplified from "cgroup.pressure.enable".

That makes two outliers instead of one. It's probably better to steal
cgroup_pressure_write for cgroup.pressure, and rename the currently
misnamed helper. How about do_pressure_write()? pressure_write()?