linux-kernel - Re: [GIT]: Networking

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Date:	Sun, 15 Jun 2008 15:31:45 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	David Miller <davem@...emloft.net>
Cc:	mingo@...e.hu, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, rjw@...k.pl
Subject: Re: [GIT]: Networking

On Sat, 14 Jun 2008 16:24:30 -0700 (PDT)
David Miller <davem@...emloft.net> wrote:

> From: Arjan van de Ven <arjan@...radead.org>
> Date: Sat, 14 Jun 2008 02:39:16 -0700
> 
> > the interesting thing is that there is a clear bias on which drivers
> > are tripping this (r8169 is top when I counted yesterday, with
> > sis900 second and then a long tail of nothing) that I think the
> > WARN_ON() is useful in addition to the always-there printk. Eg it
> > does help in seeing which driver is most likely to trigger this.
> > (Andrew also thought this would trigger a *LOT*, so far it's only a
> > rather modest amount, but it's waiting for Fedora or others to ship
> > a kernel with this in to be sure)
> 
> I agree that it's useful and should stay.
> 
> One thing I noticed is that you can't tell which driver is
> to blame just from the warning and backtrace.  Somehow getting
> a driver name in that warning message would be useful and help
> diagnose problems as well as make it easier for you to compute
> those statistics.

There's a patch in -mm to add a WARN_ON variant that takes printk like
arguments... once that goes to mainline that'd be the thing to use
here... 




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