netdev - Re: [RFC 1/3] RDMA: Add netlink infrastructure

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Date:	Fri, 13 May 2011 19:18:45 +0200
From:	Bart Van Assche <bvanassche@....org>
To:	Joe Perches <joe@...ches.com>
Cc:	Roland Dreier <roland@...nel.org>, Nir Muchtar <nirm@...taire.com>,
	netdev@...r.kernel.org, linux-rdma@...r.kernel.org
Subject: Re: [RFC 1/3] RDMA: Add netlink infrastructure

On Fri, May 13, 2011 at 6:44 PM, Joe Perches <joe@...ches.com> wrote:
> On Fri, 2011-05-13 at 09:18 -0700, Roland Dreier wrote:
>> From: Roland Dreier <roland@...estorage.com>
>> [Dave please do not apply even if this ends up in netdev patchwork!]
>
> Just trivia:
>
>> diff --git a/drivers/infiniband/core/netlink.c b/drivers/infiniband/core/netlink.c
> []
>> +#define pr_fmt(fmt) "%s:%s: " fmt, KBUILD_MODNAME, __func__
>
> Using #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
> generally produces smaller overall object size, especially
> at 64 bit.
>
> For instance, here's the size of netlink.o at 32 bit:
>
> $ size drivers/infiniband/core/netlink.o.*
>   text    data     bss     dec     hex filename
>   2663     153     736    3552     de0 drivers/infiniband/core/netlink.o.old
>   2640     153     736    3529     dc9 drivers/infiniband/core/netlink.o.new
>
> Also, I rarely find __func__ useful in message output.
> It may be more useful for active development/debugging.

A recent dynamic debug patch made it possible to enable/disable at
runtime whether or not the function name (and more) should be included
in the output. See also http://lwn.net/Articles/434833/ for more
information.

Bart.
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