linux-kernel - Re: [PATCH 1/2] fs: fsnotify: account fsnotify metadata to kmemcg

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Date:   Tue, 26 Jun 2018 11:00:53 -0700
From:   Shakeel Butt <shakeelb@...gle.com>
To:     Amir Goldstein <amir73il@...il.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...nel.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Jan Kara <jack@...e.com>, Greg Thelen <gthelen@...gle.com>,
        Roman Gushchin <guro@...com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        LKML <linux-kernel@...r.kernel.org>,
        Cgroups <cgroups@...r.kernel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Linux MM <linux-mm@...ck.org>, Jan Kara <jack@...e.cz>
Subject: Re: [PATCH 1/2] fs: fsnotify: account fsnotify metadata to kmemcg

On Mon, Jun 25, 2018 at 10:49 PM Amir Goldstein <amir73il@...il.com> wrote:
>
...
>
> The verb 'unuse' takes an argument memcg and 'uses' it - too weird.
> You can use 'override'/'revert' verbs like override_creds or just call
> memalloc_use_memcg(old_memcg) since there is no reference taken
> anyway in use_memcg and no reference released in unuse_memcg.
>
> Otherwise looks good to me.
>

Thanks for your feedback. Just using memalloc_use_memcg(old_memcg) and
ignoring the return seems more simple. I will wait for feedback from
other before changing anything.

thanks,
Shakeel