linux-kernel - Re: [PATCH v3 2/3] x86: query dynamic DEBUG

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Date:	Tue, 2 Feb 2016 15:04:35 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Christian Borntraeger <borntraeger@...ibm.com>
Cc:	David Rientjes <rientjes@...gle.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, linux-arch@...r.kernel.org,
	linux-s390@...r.kernel.org, x86@...nel.org,
	linuxppc-dev@...ts.ozlabs.org, davem@...emloft.net,
	Joonsoo Kim <iamjoonsoo.kim@....com>, davej@...emonkey.org.uk
Subject: Re: [PATCH v3 2/3] x86: query dynamic DEBUG_PAGEALLOC setting

On Tue, 2 Feb 2016 23:37:50 +0100 Christian Borntraeger <borntraeger@...ibm.com> wrote:

> On 02/02/2016 11:21 PM, Andrew Morton wrote:
> > On Tue, 2 Feb 2016 22:53:36 +0100 Christian Borntraeger <borntraeger@...ibm.com> wrote:
> > 
> >>>> I don't think we should have a CONFIG_DEBUG_PAGEALLOC that does some stuff 
> >>>> and then a commandline parameter or CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT 
> >>>> to enable more stuff.  It should either be all enabled by the commandline 
> >>>> (or config option) or split into a separate entity.  
> >>>> CONFIG_DEBUG_PAGEALLOC_LIGHT and CONFIG_DEBUG_PAGEALLOC would be fine, but 
> >>>> the current state is very confusing about what is being done and what 
> >>>> isn't.
> >>>>
> >>>
> >>> Ping?
> >>>
> >> https://lkml.org/lkml/2016/1/29/266 
> > 
> > That's already in linux-next so I can't apply it.
> > 
> > Well, I can, but it's a hassle.  What's happening here?
> 
> I pushed it on my tree for kbuild testing purposes some days ago. 
> Will drop so that it can go via mm.

There are other patches that I haven't merged because they were already
in -next.  In fact I think I dropped them because they later popped up
in -next.

Some or all of:

lib-spinlock_debugc-prevent-an-infinite-recursive-cycle-in-spin_dump.patch
mm-provide-debug_pagealloc_enabled-without-config_debug_pagealloc.patch
x86-query-dynamic-debug_pagealloc-setting.patch
s390-query-dynamic-debug_pagealloc-setting.patch
mm-provide-debug_pagealloc_enabled-without-config_debug_pagealloc.patch
x86-query-dynamic-debug_pagealloc-setting.patch
s390-query-dynamic-debug_pagealloc-setting.patch

So please resend everything which you think is needed.