linux-kernel - Re: [PATCH v10 4/4] cgroups: implement the PIDs subsystem

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Message-ID: <CAOviyahq6kr8Q-sXHHmwrZmFrPfj-kJ8QjUYNceRZAG1ZfLv_A@mail.gmail.com>
Date:	Sat, 25 Apr 2015 00:24:08 +1000
From:	Aleksa Sarai <cyphar@...har.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	lizefan@...wei.com, mingo@...hat.com, peterz@...radead.org,
	richard@....at,
	Frédéric Weisbecker <fweisbec@...il.com>,
	linux-kernel@...r.kernel.org, cgroups@...r.kernel.org
Subject: Re: [PATCH v10 4/4] cgroups: implement the PIDs subsystem

Also,

>> +struct pids_cgroup {
>> +     struct cgroup_subsys_state      css;
>> +
>> +     /*
>> +      * Use 64-bit types so that we can safely represent "max" as
>> +      * (PID_MAX_LIMIT + 1).
>             ^^^^^^^^^^^^^^^^^
> ...
>> +static struct cgroup_subsys_state *
>> +pids_css_alloc(struct cgroup_subsys_state *parent)
>> +{
>> +     struct pids_cgroup *pids;
>> +
>> +     pids = kzalloc(sizeof(struct pids_cgroup), GFP_KERNEL);
>> +     if (!pids)
>> +             return ERR_PTR(-ENOMEM);
>> +
>> +     pids->limit = PIDS_MAX;
>                       ^^^^^^^^^

%PIDS_MAX = (%PID_MAX_LIMIT + 1). I can clarify this in the comments
if you want.

--
Aleksa Sarai (cyphar)
www.cyphar.com
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