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

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Date:	Fri, 13 May 2011 10:36:07 -0700
From:	Joe Perches <joe@...ches.com>
To:	Bart Van Assche <bvanassche@....org>
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, 2011-05-13 at 19:18 +0200, Bart Van Assche wrote:
> 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!]
> >> 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.

One long term goal for me is a generic run-time mechanism
to prefix all pr_<level> uses not just the <foo>_dbg ones
with or without module or function name.

It will also allow the removal of all the uses of
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

New #define pr_fmt lines need to be added to the current
files that use pr_<level> without a prefix so it could
take awhile.

Eventually.

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