linux-kernel - Re: [BUG linux-next] Kernel panic found with linux-next-20160414

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Message-ID: <57207D88.4000508@suse.cz>
Date:	Wed, 27 Apr 2016 10:51:20 +0200
From:	Vlastimil Babka <vbabka@...e.cz>
To:	Hugh Dickins <hughd@...gle.com>, "Shi, Yang" <yang.shi@...aro.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, sfr@...b.auug.org.au,
	LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Subject: Re: [BUG linux-next] Kernel panic found with linux-next-20160414

On 04/27/2016 10:14 AM, Hugh Dickins wrote:
> It's rather horrible that compaction.c uses functions in page_alloc.c
> which skip doing some of the things we expect to be done: the non-debug
> preparation tends to get noticed, but the debug options overlooked.
> We can expect more problems of this kind in future: someone will add
> yet another debug prep line in page_alloc.c, and at first nobody will
> notice that it's also needed in compaction.c.

Point taken, I'll try to come up with more maintainable solution next 
time I attempt the isolate_freepages_direct() approach. Sorry about the 
troubles.