linux-kernel - Re: [PATCH v3 2/8] mm/debug-pagealloc: prepare boottime configurable on/off

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Date:	Tue, 23 Dec 2014 13:56:44 +0900
From:	Joonsoo Kim <iamjoonsoo.kim@....com>
To:	Paul Bolle <pebolle@...cali.nl>
Cc:	Valentin Rothberg <valentinrothberg@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>,
	Johannes Weiner <hannes@...xchg.org>,
	Minchan Kim <minchan@...nel.org>, Dave Hansen <dave@...1.net>,
	Michal Nazarewicz <mina86@...a86.com>,
	Jungsoo Son <jungsoo.son@....com>,
	Ingo Molnar <mingo@...hat.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/8] mm/debug-pagealloc: prepare boottime configurable
 on/off

On Mon, Dec 22, 2014 at 10:10:42AM +0100, Paul Bolle wrote:
> Hi Joonsoo,
> 
> On Fri, 2014-11-28 at 16:35 +0900, Joonsoo Kim wrote:
> > Hello, Paul.
> > 
> > Thanks for spotting this.
> > I attach the patch. :)
> > 
> > Andrew,
> > Could you kindly fold this into the patch in your tree?
> > 
> > Thanks.
> > 
> > ------------------->8---------------
> > From a33c480160904cc93333807a448960151ac4c534 Mon Sep 17 00:00:00 2001
> > From: Joonsoo Kim <iamjoonsoo.kim@....com>
> > Date: Fri, 28 Nov 2014 16:05:32 +0900
> > Subject: [PATCH] mm/debug_pagealloc: remove obsolete Kconfig options
> > 
> > These are obsolete since commit "mm/debug-pagealloc: prepare boottime
> > configurable" is merged. So, remove it.
> > 
> > [pebolle@...cali.nl: find obsolete Kconfig options]
> > Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>
> > ---
> >  mm/Kconfig.debug |    9 ---------
> >  1 file changed, 9 deletions(-)
> > 
> > diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug
> > index 56badfc..957d3da 100644
> > --- a/mm/Kconfig.debug
> > +++ b/mm/Kconfig.debug
> > @@ -14,7 +14,6 @@ config DEBUG_PAGEALLOC
> >  	depends on !KMEMCHECK
> >  	select PAGE_EXTENSION
> >  	select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC
> > -	select PAGE_GUARD if ARCH_SUPPORTS_DEBUG_PAGEALLOC
> >  	---help---
> >  	  Unmap pages from the kernel linear mapping after free_pages().
> >  	  This results in a large slowdown, but helps to find certain types
> > @@ -27,13 +26,5 @@ config DEBUG_PAGEALLOC
> >  	  that would result in incorrect warnings of memory corruption after
> >  	  a resume because free pages are not saved to the suspend image.
> >  
> > -config WANT_PAGE_DEBUG_FLAGS
> > -	bool
> > -
> >  config PAGE_POISONING
> >  	bool
> > -	select WANT_PAGE_DEBUG_FLAGS
> > -
> > -config PAGE_GUARD
> > -	bool
> > -	select WANT_PAGE_DEBUG_FLAGS
> 
> This patch didn't make it into v3.19-rc1. And I think it never entered
> linux-next. Did this fall through the cracks or was there some other
> issue with this patch?

Hello,

I guess that it is just missed.
I re-sent the patch to Andrew a while ago.

Thank you for reporting.

Thanks.
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