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=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham 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 9C24BC433DF for ; Fri, 7 Aug 2020 09:13:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6291222CF6 for ; Fri, 7 Aug 2020 09:13:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728137AbgHGJNq (ORCPT ); Fri, 7 Aug 2020 05:13:46 -0400 Received: from out30-54.freemail.mail.aliyun.com ([115.124.30.54]:60383 "EHLO out30-54.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727801AbgHGJNV (ORCPT ); Fri, 7 Aug 2020 05:13:21 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R171e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e07425;MF=richard.weiyang@linux.alibaba.com;NM=1;PH=DS;RN=5;SR=0;TI=SMTPD_---0U5.0C2k_1596791598; Received: from localhost(mailfrom:richard.weiyang@linux.alibaba.com fp:SMTPD_---0U5.0C2k_1596791598) by smtp.aliyun-inc.com(127.0.0.1); Fri, 07 Aug 2020 17:13:19 +0800 From: Wei Yang To: mike.kravetz@oracle.com, akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Wei Yang Subject: [PATCH 06/10] mm/hugetlb: remove redundant huge_pte_alloc() in hugetlb_fault() Date: Fri, 7 Aug 2020 17:12:47 +0800 Message-Id: <20200807091251.12129-7-richard.weiyang@linux.alibaba.com> X-Mailer: git-send-email 2.20.1 (Apple Git-117) In-Reply-To: <20200807091251.12129-1-richard.weiyang@linux.alibaba.com> References: <20200807091251.12129-1-richard.weiyang@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Before proper processing, huge_pte_alloc() would be called un-conditionally. It is not necessary to do this when ptep is NULL. Signed-off-by: Wei Yang --- mm/hugetlb.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index f5f04e89000d..fb09e5a83c39 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -4534,10 +4534,6 @@ vm_fault_t hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, } else if (unlikely(is_hugetlb_entry_hwpoisoned(entry))) return VM_FAULT_HWPOISON_LARGE | VM_FAULT_SET_HINDEX(hstate_index(h)); - } else { - ptep = huge_pte_alloc(mm, haddr, huge_page_size(h)); - if (!ptep) - return VM_FAULT_OOM; } /* -- 2.20.1 (Apple Git-117)