netdev - Re: [PATCH v3] datapath: Avoid using stack larger than 1024.

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Message-ID: <CAOrHB_B7PpKMdVn8JNG9B-R6i80Zxn8rEBBptCSKCTz6TdsU6g@mail.gmail.com>
Date:   Thu, 29 Jun 2017 10:45:42 -0700
From:   Pravin Shelar <pshelar@....org>
To:     Tonghao Zhang <xiangxia.m.yue@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Greg Rose <gvrose8192@...il.com>
Subject: Re: [PATCH v3] datapath: Avoid using stack larger than 1024.

On Wed, Jun 28, 2017 at 6:38 PM, Tonghao Zhang <xiangxia.m.yue@...il.com> wrote:
> When compiling OvS-master on 4.4.0-81 kernel,
> there is a warning:
>
>     CC [M]  /root/ovs/datapath/linux/datapath.o
>     /root/ovs/datapath/linux/datapath.c: In function
>     'ovs_flow_cmd_set':
>     /root/ovs/datapath/linux/datapath.c:1221:1: warning:
>     the frame size of 1040 bytes is larger than 1024 bytes
>     [-Wframe-larger-than=]
>
> This patch factors out match-init and action-copy to avoid
> "Wframe-larger-than=1024" warning. Because mask is only
> used to get actions, we new a function to save some
> stack space.
>
> Signed-off-by: Tonghao Zhang <xiangxia.m.yue@...il.com>
> ---
Looks good, you have to submit patch against net-next for upstream OVS
module first.