Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965230AbbHLI7c (ORCPT ); Wed, 12 Aug 2015 04:59:32 -0400 Received: from TYO201.gate.nec.co.jp ([210.143.35.51]:50618 "EHLO tyo201.gate.nec.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932470AbbHLI71 convert rfc822-to-8bit (ORCPT ); Wed, 12 Aug 2015 04:59:27 -0400 From: Naoya Horiguchi To: Wanpeng Li CC: Andrew Morton , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH v2 3/5] mm/hwpoison: introduce put_hwpoison_page to put refcount for memory error handling Thread-Topic: [PATCH v2 3/5] mm/hwpoison: introduce put_hwpoison_page to put refcount for memory error handling Thread-Index: AQHQ02OaXgh/muq13Ey6D1jfk5GNo54HfGgA Date: Wed, 12 Aug 2015 08:58:18 +0000 Message-ID: <20150812085818.GE32192@hori1.linux.bs1.fc.nec.co.jp> References: <1439206103-86829-1-git-send-email-wanpeng.li@hotmail.com> In-Reply-To: Accept-Language: ja-JP, en-US Content-Language: ja-JP X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.128.101.24] Content-Type: text/plain; charset="iso-2022-jp" Content-ID: Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2196 Lines: 67 On Mon, Aug 10, 2015 at 07:28:21PM +0800, Wanpeng Li wrote: > Introduce put_hwpoison_page to put refcount for memory > error handling. > > Suggested-by: Naoya Horiguchi > Signed-off-by: Wanpeng Li Thanks! Acked-by: Naoya Horiguchi > --- > include/linux/mm.h | 1 + > mm/memory-failure.c | 21 +++++++++++++++++++++ > 2 files changed, 22 insertions(+), 0 deletions(-) > > diff --git a/include/linux/mm.h b/include/linux/mm.h > index 554b0f0..c0a0b9f 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -2103,6 +2103,7 @@ extern int memory_failure(unsigned long pfn, int trapno, int flags); > extern void memory_failure_queue(unsigned long pfn, int trapno, int flags); > extern int unpoison_memory(unsigned long pfn); > extern int get_hwpoison_page(struct page *page); > +extern void put_hwpoison_page(struct page *page); > extern int sysctl_memory_failure_early_kill; > extern int sysctl_memory_failure_recovery; > extern void shake_page(struct page *p, int access); > diff --git a/mm/memory-failure.c b/mm/memory-failure.c > index e0eb7ab..fa9aa21 100644 > --- a/mm/memory-failure.c > +++ b/mm/memory-failure.c > @@ -922,6 +922,27 @@ int get_hwpoison_page(struct page *page) > } > EXPORT_SYMBOL_GPL(get_hwpoison_page); > > +/** > + * put_hwpoison_page() - Put refcount for memory error handling: > + * @page: raw error page (hit by memory error) > + */ > +void put_hwpoison_page(struct page *page) > +{ > + struct page *head = compound_head(page); > + > + if (PageHuge(head)) { > + put_page(head); > + return; > + } > + > + if (PageTransHuge(head)) > + if (page != head) > + put_page(head); > + > + put_page(page); > +} > +EXPORT_SYMBOL_GPL(put_hwpoison_page); > + > /* > * Do all that is necessary to remove user space mappings. Unmap > * the pages and send SIGBUS to the processes if the data was dirty. > -- > 1.7.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/