linux-kernel - Re: [PATCHv2, RFC 14/30] thp, mm: naive support of thp in generic read/write routines

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Message-Id: <20130315132716.AF225E0085@blue.fi.intel.com>
Date:	Fri, 15 Mar 2013 15:27:16 +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 14/30] thp, mm: naive support of thp in generic
 read/write routines

Hillf Danton wrote:
> On Fri, Mar 15, 2013 at 1:50 AM, Kirill A. Shutemov
> <kirill.shutemov@...ux.intel.com> wrote:
> > +               if (PageTransTail(page)) {
> > +                       page_cache_release(page);
> > +                       page = find_get_page(mapping,
> > +                                       index & ~HPAGE_CACHE_INDEX_MASK);
> check page is valid, please.

Good catch. Fixed.

> > +                       if (!PageTransHuge(page)) {
> > +                               page_cache_release(page);
> > +                               goto find_page;
> > +                       }
> > +               }

-- 
 Kirill A. Shutemov
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