Subject: Re: about : [NET]: Replace CONFIG_NET_DEBUG with sysctl.

From: Stephen Hemminger <[email-masked]>
Date: Fri, 09 Mar 2007 08:22:54 -0800

Eric Dumazet wrote:
> Hello David and Stephen
>
> I see git commit 8e2101a9faab43dcf307d46784a1ede7997fe729
> and its potential problems :
>
> Here on my x86_64 machine :
>
> ffffffff806e7520 d rtnl_mutex
> ffffffff806e7538 D net_msg_cost
> ffffffff806e753c D net_msg_burst
> ffffffff806e7540 D net_msg_warn
> ffffffff806e7560 d lweventlist_lock
>
It probably is worth making a hot/cold map somehow. Ideally some 
automated version
of something like oprofile uses (memprofile?)
> So net_msg_{cost|burst|warn} are on two 'heavy' cachelines.
>
> I gently ask that any new sysctl is '__read_mostly' tagged.
Why not all the old one's as well?