linux-kernel - Re: [PATCHv2, RFC 13/30] thp, mm: implement grab_cache_huge_page_write

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Message-Id: <20130315133543.E0865E0085@blue.fi.intel.com>
Date:	Fri, 15 Mar 2013 15:35:43 +0200 (EET)
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	Hillf Danton <dhillf@...il.com>
Cc:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Hugh Dickins <hughd@...gle.com>,
	Wu Fengguang <fengguang.wu@...el.com>, Jan Kara <jack@...e.cz>,
	Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org,
	Andi Kleen <ak@...ux.intel.com>,
	Matthew Wilcox <matthew.r.wilcox@...el.com>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2, RFC 13/30] thp, mm: implement
 grab_cache_huge_page_write_begin()

Hillf Danton wrote:
> On Fri, Mar 15, 2013 at 9:24 PM, Kirill A. Shutemov
> <kirill.shutemov@...ux.intel.com> wrote:
> > Hillf Danton wrote:
> >> On Fri, Mar 15, 2013 at 1:50 AM, Kirill A. Shutemov
> >> <kirill.shutemov@...ux.intel.com> wrote:
> >> > +#ifdef CONFIG_TRANSPARENT_HUGEPAGE
> >> > +struct page *grab_cache_huge_page_write_begin(struct address_space *mapping,
> >> > +                       pgoff_t index, unsigned flags);
> >> > +#else
> >> > +static inline struct page *grab_cache_huge_page_write_begin(
> >> > +               struct address_space *mapping, pgoff_t index, unsigned flags)
> >> > +{
> >> build bug?
> >
> > Hm?. No. Why?
> >
> Stop build if THP not configured?

No. I've tested it without CONFIG_TRANSPARENT_HUGEPAGE.

-- 
 Kirill A. Shutemov
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