netdev - Re: [Patch net-next] net_sched: kill u32

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Message-ID: <CAM_iQpXx4BnkOQPBu7G12BAnGB_W18=dSJRjg206K6ek+8=o8g@mail.gmail.com>
Date:   Wed, 23 Aug 2017 14:14:15 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Jamal Hadi Salim <jhs@...atatu.com>
Subject: Re: [Patch net-next] net_sched: kill u32_node pointer in Qdisc

On Wed, Aug 23, 2017 at 1:25 PM, Jiri Pirko <jiri@...nulli.us> wrote:
>>+static struct hlist_head *tc_u_common_hash;
>
> Why not use rhashtable?
>

It doesn't have to be so complicated, it is not fast path and
we don't have so many qdisc's and u32 filters in system
relatively.


>>+      tc_u_common_hash = kvmalloc_array(U32_HASH_SIZE, sizeof(struct hlist_head), GFP_KERNEL);
>
> This is over 80cols.
>

Yeah, it doesn't harm anything, but I can fix it.