linux-kernel - Re: [PATCH v11 2/9] hugetlb_cgroup: add interface for charge/uncharge hugetlb reservations

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Message-ID: <CAHS8izOYB3cz+EP4G8qNJygO7Zjq6AFbpnGrjthCXKi4DHUx3A@mail.gmail.com>
Date:   Thu, 6 Feb 2020 10:16:01 -0800
From:   Mina Almasry <almasrymina@...gle.com>
To:     Mike Kravetz <mike.kravetz@...cle.com>
Cc:     shuah <shuah@...nel.org>, David Rientjes <rientjes@...gle.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Greg Thelen <gthelen@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        open list <linux-kernel@...r.kernel.org>, linux-mm@...ck.org,
        linux-kselftest@...r.kernel.org, cgroups@...r.kernel.org
Subject: Re: [PATCH v11 2/9] hugetlb_cgroup: add interface for charge/uncharge
 hugetlb reservations

On Wed, Feb 5, 2020 at 2:08 PM Mike Kravetz <mike.kravetz@...cle.com> wrote:
>
> On 2/3/20 3:22 PM, Mina Almasry wrote:
> > Augments hugetlb_cgroup_charge_cgroup to be able to charge hugetlb
> > usage or hugetlb reservation counter.
> >
> > Adds a new interface to uncharge a hugetlb_cgroup counter via
> > hugetlb_cgroup_uncharge_counter.
> >
> > Integrates the counter with hugetlb_cgroup, via hugetlb_cgroup_init,
> > hugetlb_cgroup_have_usage, and hugetlb_cgroup_css_offline.
> >
> > Signed-off-by: Mina Almasry <almasrymina@...gle.com>
> > Acked-by: Mike Kravetz <mike.kravetz@...cle.com>
> > Acked-by: David Rientjes <rientjes@...gle.com>
> >
> > ---
> >
> > Changes in v11:
> > - Changed all 'reserved' or 'reservation' to 'rsvd' to reflect the user
> > interface.
>
> Thanks.
>
> Small nit,
>
> > @@ -450,8 +496,7 @@ static ssize_t hugetlb_cgroup_reset(struct kernfs_open_file *of,
> >       struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(of_css(of));
> >
> >       counter = &h_cg->hugepage[MEMFILE_IDX(of_cft(of)->private)];
> > -     rsvd_counter =
> > -             &h_cg->rsvd_hugepage[MEMFILE_IDX(of_cft(of)->private)];
> > +     rsvd_counter = &h_cg->rsvd_hugepage[MEMFILE_IDX(of_cft(of)->private)];
> >
>
> That looks like a change just to reformat a line added in the first patch?
>
> >       switch (MEMFILE_ATTR(of_cft(of)->private)) {
> >       case RES_MAX_USAGE:
>

Gah, my bad. I'll move this to patch 1.

> --
> Mike Kravetz