linux-kernel - Re: [PATCHv2, RFC 09/30] thp, mm: rewrite delete_from_page

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Message-Id: <20130315132359.19AB9E0085@blue.fi.intel.com>
Date:	Fri, 15 Mar 2013 15:23:59 +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 09/30] thp, mm: rewrite delete_from_page_cache() to
 support huge pages

Hillf Danton wrote:
> On Fri, Mar 15, 2013 at 1:50 AM, Kirill A. Shutemov
> <kirill.shutemov@...ux.intel.com> wrote:
> > +       if (PageTransHuge(page)) {
> > +               int i;
> > +
> > +               for (i = 0; i < HPAGE_CACHE_NR; i++)
> > +                       radix_tree_delete(&mapping->page_tree, page->index + i);
> 
> Move the below page_cache_release for tail page here, please.

Okay. Thanks.

> > +               nr = HPAGE_CACHE_NR;
> [...]
> > +       if (PageTransHuge(page))
> > +               for (i = 1; i < HPAGE_CACHE_NR; i++)
> > +                       page_cache_release(page + i);
> >         page_cache_release(page);

-- 
 Kirill A. Shutemov
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