Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
References: <20210316041645.144249-1-arjunroy.kdev@gmail.com> <CAOFY-A1L8c626HZYSWm6ZKFO9mqBdBszv6obX4-1_LmDBQ6Z4A@mail.gmail.com>
In-Reply-To: <CAOFY-A1L8c626HZYSWm6ZKFO9mqBdBszv6obX4-1_LmDBQ6Z4A@mail.gmail.com>
From:   Shakeel Butt <shakeelb@google.com>
Date:   Mon, 15 Mar 2021 21:29:37 -0700
Message-ID: <CALvZod7hgtdrN_KXD_5JdB2vzJzTc8tVz_5YFN53-xZjpHLLRw@mail.gmail.com>
Subject: Re: [mm, net-next v2] mm: net: memcg accounting for TCP rx zerocopy
To:     Arjun Roy <arjunroy@google.com>
Cc:     Arjun Roy <arjunroy.kdev@gmail.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        David Miller <davem@davemloft.net>,
        netdev <netdev@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Cgroups <cgroups@vger.kernel.org>, Linux MM <linux-mm@kvack.org>,
        Eric Dumazet <edumazet@google.com>,
        Soheil Hassas Yeganeh <soheil@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Michal Hocko <mhocko@kernel.org>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Yang Shi <shy828301@gmail.com>, Roman Gushchin <guro@fb.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Mon, Mar 15, 2021 at 9:20 PM Arjun Roy <arjunroy@google.com> wrote:
>
[...]
> >
>
> Apologies for the spam - looks like I forgot to rebase the first time
> I sent this out.
>
> Actually, on a related note, it's not 100% clear to me whether this
> patch (which in its current form, applies to net-next) should instead
> be based on the mm branch - but the most recent (clean) checkout of mm
> fails to build for me so net-next for now.
>

It is due to "mm: page-writeback: simplify memcg handling in
test_clear_page_writeback()" patch in the mm tree. You would need to
reintroduce the lock_page_memcg() which returns the memcg and make
__unlock_page_memcg() non-static.