From: Ido Schimmel <idosch@nvidia.com>
To: xuanqiang.luo@linux.dev
Cc: "David S . Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
David Ahern <dsahern@kernel.org>, Simon Horman <horms@kernel.org>,
Kuniyuki Iwashima <kuniyu@google.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Xuanqiang Luo <luoxuanqiang@kylinos.cn>
Subject: Re: [PATCH net-next v3 1/2] ipv4: use rcu_assign_pointer() in rt_flush_dev()
Date: Mon, 13 Jul 2026 18:58:08 +0300 [thread overview]
Message-ID: <20260713155808.GA656327@shredder> (raw)
In-Reply-To: <20260708060537.17188-2-xuanqiang.luo@linux.dev>
On Wed, Jul 08, 2026 at 02:05:36PM +0800, xuanqiang.luo@linux.dev wrote:
> From: Xuanqiang Luo <luoxuanqiang@kylinos.cn>
>
> rt_flush_dev() replaces rt->dst.dev with blackhole_netdev on uncached
> routes. The field is also exposed as dst.dev_rcu, and existing readers
> use dst_dev_rcu().
>
> Use rcu_assign_pointer() for the replacement, as dst_dev_put() already
> does for the same field.
>
> Signed-off-by: Xuanqiang Luo <luoxuanqiang@kylinos.cn>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
next prev parent reply other threads:[~2026-07-13 15:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-08 6:05 [PATCH net-next v3 0/2] ipv4: update rt_flush_dev() and two dst.dev readers xuanqiang.luo
2026-07-08 6:05 ` [PATCH net-next v3 1/2] ipv4: use rcu_assign_pointer() in rt_flush_dev() xuanqiang.luo
2026-07-13 15:58 ` Ido Schimmel [this message]
2026-07-08 6:05 ` [PATCH net-next v3 2/2] ipv4: snapshot dst.dev in ip_rt_send_redirect() and ip_rt_get_source() xuanqiang.luo
2026-07-13 15:59 ` Ido Schimmel
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