netdev - Re: [PATCH v2] net: openvswitch: introduce common code for flushing flows

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Message-ID: <CAM_iQpWUP11mGwXPB=JKsT2=zhyUEf-udXp9YNYS_Fdt73knmg@mail.gmail.com>
Date:   Thu, 13 Aug 2020 12:04:58 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Tonghao Zhang <xiangxia.m.yue@...il.com>
Cc:     Joel Fernandes <joel@...lfernandes.org>,
        Johan Knöös <jknoos@...gle.com>,
        Gregory Rose <gvrose8192@...il.com>,
        "Uladzislau Rezki (Sony)" <urezki@...il.com>,
        "Paul E . McKenney" <paulmck@...nel.org>, dev@...nvswitch.org,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        rcu <rcu@...r.kernel.org>
Subject: Re: [PATCH v2] net: openvswitch: introduce common code for flushing flows

On Wed, Aug 12, 2020 at 2:59 AM <xiangxia.m.yue@...il.com> wrote:
>
> From: Tonghao Zhang <xiangxia.m.yue@...il.com>
>
> To avoid some issues, for example RCU usage warning and double free,
> we should flush the flows under ovs_lock. This patch refactors
> table_instance_destroy and introduces table_instance_flow_flush
> which can be invoked by __dp_destroy or ovs_flow_tbl_flush.
>
> Fixes: 50b0e61b32ee ("net: openvswitch: fix possible memleak on destroy flow-table")
> Reported-by: Johan Knöös <jknoos@...gle.com>
> Reported-at: https://mail.openvswitch.org/pipermail/ovs-discuss/2020-August/050489.html
> Signed-off-by: Tonghao Zhang <xiangxia.m.yue@...il.com>

Reviewed-by: Cong Wang <xiyou.wangcong@...il.com>

Thanks.