linux-kernel - Re: [PATCH 6/9] mm/page_alloc: add informative debugging message in page_outside_zone

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Date:	Fri, 1 Feb 2013 16:29:57 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Cody P Schafer <cody@...ux.vnet.ibm.com>,
	Linux MM <linux-mm@...ck.org>,
	David Hansen <dave@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Catalin Marinas <catalin.marinas@....com>
Subject: Re: [PATCH 6/9] mm/page_alloc: add informative debugging message in
 page_outside_zone_boundaries()

On Fri, 1 Feb 2013 16:28:48 -0800
Andrew Morton <akpm@...ux-foundation.org> wrote:

> > +	if (ret)
> > +		pr_debug("page %lu outside zone [ %lu - %lu ]\n",
> > +			pfn, start_pfn, start_pfn + sp);
> > +
> >  	return ret;
> >  }
> 
> As this condition leads to a VM_BUG_ON(), "pr_debug" seems rather wimpy
> and I doubt if we need to be concerned about flooding the console.
> 
> I'll switch it to pr_err.

otoh, as nobody has ever hit that VM_BUG_ON() (yes?), do we really need
the patch?

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