linux-kernel - Re: [PATCH] tun: make tun_build

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Date:   Wed, 16 Aug 2017 22:29:55 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     mst@...hat.com, Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [PATCH] tun: make tun_build_skb() thread safe



On 2017年08月16日 22:14, Jason Wang wrote:
> From: Eric Dumazet <eric.dumazet@...il.com>
>
> tun_build_skb() is not thread safe since it uses per queue page frag,
> this will break things when multiple threads are sending through same
> queue. Switch to use per-thread generator (no lock involved).
>
> Fixes: 66ccbc9c87c2 ("tap: use build_skb() for small packet")
> Tested-by: Jason Wang <jasowang@...hat.com>
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
> Signed-off-by: Jason Wang <jasowang@...hat.com>
> ---
>   drivers/net/tun.c | 7 +------

Forget to mention, this is for net-next.

Thanks