netdev - Re: [PATCH] reduce the spinlock conflict during massive connect

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Date:   Sun, 5 Nov 2017 20:12:25 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Liu Yu <liuyu924@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        "David S. Miller <davem@...emloft.net>,Alexey Kuznetsov
        <kuznet@....inr.ac.ru>,Hideaki YOSHIFUJI" <yoshfuji@...ux-ipv6.org>
Subject: Re: [PATCH] reduce the spinlock conflict during massive connect

On Sun, Nov 5, 2017 at 6:28 PM, Liu Yu <liuyu924@...il.com> wrote:
> -               spin_lock_bh(&head->lock);
> +               ret = spin_trylock(&head->lock);

Clearly you want spin_trylock_bh() instead.