From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B7E29C432C3 for ; Thu, 21 Nov 2019 01:05:49 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 8192320730 for ; Thu, 21 Nov 2019 01:05:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8192320730 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 286A76B029B; Wed, 20 Nov 2019 20:05:49 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 20FD66B029C; Wed, 20 Nov 2019 20:05:49 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 125D46B029D; Wed, 20 Nov 2019 20:05:49 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0019.hostedemail.com [216.40.44.19]) by kanga.kvack.org (Postfix) with ESMTP id EB4FF6B029B for ; Wed, 20 Nov 2019 20:05:48 -0500 (EST) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with SMTP id B34428249980 for ; Thu, 21 Nov 2019 01:05:48 +0000 (UTC) X-FDA: 76178492376.17.wire58_32a61e30b0943 X-HE-Tag: wire58_32a61e30b0943 X-Filterd-Recvd-Size: 2512 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by imf11.hostedemail.com (Postfix) with ESMTP for ; Thu, 21 Nov 2019 01:05:47 +0000 (UTC) X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 Nov 2019 17:05:46 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,223,1571727600"; d="scan'208";a="237975989" Received: from richard.sh.intel.com (HELO localhost) ([10.239.159.54]) by fmsmga002.fm.intel.com with ESMTP; 20 Nov 2019 17:05:45 -0800 Date: Thu, 21 Nov 2019 09:05:36 +0800 From: Wei Yang To: David Hildenbrand Cc: Wei Yang , n-horiguchi@ah.jp.nec.com, akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] mm/memory-failure.c: not necessary to recalculate hpage Message-ID: <20191121010536.GA12975@richard> Reply-To: Wei Yang References: <20191118082003.26240-1-richardw.yang@linux.intel.com> <20191118082003.26240-2-richardw.yang@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Nov 20, 2019 at 04:07:38PM +0100, David Hildenbrand wrote: >On 18.11.19 09:20, Wei Yang wrote: >> hpage is not changed. >> >> Signed-off-by: Wei Yang >> --- >> mm/memory-failure.c | 1 - >> 1 file changed, 1 deletion(-) >> >> diff --git a/mm/memory-failure.c b/mm/memory-failure.c >> index 392ac277b17d..9784f4339ae7 100644 >> --- a/mm/memory-failure.c >> +++ b/mm/memory-failure.c >> @@ -1319,7 +1319,6 @@ int memory_failure(unsigned long pfn, int flags) >> } >> unlock_page(p); >> VM_BUG_ON_PAGE(!page_count(p), p); >> - hpage = compound_head(p); >> } >> /* >> > >I am *absolutely* no transparent huge page expert (sorry :) ), but won't the >split_huge_page(p) eventually split the compound page, such that >compound_head(p) will return something else after that call? > ok, you may get some point. I lost some concentration here. Thanks >-- > >Thanks, > >David / dhildenb -- Wei Yang Help you, Help me