linux-kernel - Re: [RFC PATCH net-next] net: Convert LIMIT_NETDEBUG to net_dbg

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Date:	Mon, 10 Nov 2014 07:26:55 -0800
From:	Joe Perches <joe@...ches.com>
To:	nicolas.dichtel@...nd.com
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Remi Denis-Courmont <courmisch@...il.com>
Subject: Re: [RFC PATCH net-next] net: Convert LIMIT_NETDEBUG to
 net_dbg_ratelimited

On Mon, 2014-11-10 at 15:27 +0100, Nicolas Dichtel wrote:
> Le 09/11/2014 20:17, Joe Perches a écrit :
> > Use the more common dynamic_debug capable net_dbg_ratelimited
> > and remove the LIMIT_NETDEBUG macro.
> >
> > This may have some negative impact on messages that were
> > emitted at KERN_INFO that are not not enabled at all unless
> > DEBUG is defined or dynamic_debug is enabled.  Even so,
> > these messages are now _not_ emitted by default.
> >
> > This eliminates the use of the net_msg_warn sysctl
> > "/proc/sys/net/core/warnings".
[]
> > diff --git a/include/net/sock.h b/include/net/sock.h
[]
> > @@ -2276,13 +2276,7 @@ bool sk_ns_capable(const struct sock *sk,
> >   bool sk_capable(const struct sock *sk, int cap);
> >   bool sk_net_capable(const struct sock *sk, int cap);
> >
> > -/*
> > - *	Enable debug/info messages
> > - */
> > -extern int net_msg_warn;
> > -#define LIMIT_NETDEBUG(fmt, args...) \
> > -	do { if (net_msg_warn && net_ratelimit()) printk(fmt,##args); } while(0)
> > -
> > +extern int net_msg_warn;	/* Unused, but still a sysctl */
> Why not removing this variable from this header and from net/core/utils.c?
> Just declaring a static variable in net/core/sysctl_net_core.c should be enough.
> Am I missing something?

No.  It's reasonable to remove its EXPORT_SYMBOL use too.

First let's see if there are any objections to the removal.


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