linux-kernel - Re: [PATCH] vsprintf.c: Use noinline_for

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Date:	Sat, 13 Mar 2010 09:44:55 -0800
From:	Joe Perches <joe@...ches.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Andrew <nick@...k-andrew.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...e.de>, netdev@...r.kernel.org,
	Bjorn Helgaas <bjorn.helgaas@...com>
Subject: Re: [PATCH] vsprintf.c: Use noinline_for_stack

On Sat, 2010-03-13 at 07:35 -0800, Linus Torvalds wrote:
> On Fri, 12 Mar 2010, Andrew Morton wrote:
> > nice.
> But the kallsyms_lookup()/sprint_symbol() functions don't take a 
> length parameter, so we have to do the worst-case thing (which itself has 
> tons of unnecessary padding).

I sent a patch once about that using a struct
because I didn't like the unbounded sprint
http://lkml.org/lkml/2009/4/15/16

> Gaah. We do _not_ want a kmalloc() or something like that in this path, 
> since its' very much used for oopses (which in turn may be due to various 
> slab bugs etc).

Perhaps a new snprint_symbol function with the
other kallsyms... functions changed as necessary.

thoughts?

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