netdev - Re: about : [NET]: Replace CONFIG_NET

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Message-ID: <45F189DE.7030206@linux-foundation.org>
Date:	Fri, 09 Mar 2007 08:22:54 -0800
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	Eric Dumazet <dada1@...mosbay.com>
CC:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: about : [NET]: Replace CONFIG_NET_DEBUG with sysctl.

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?
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