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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 1F784C433E0 for ; Sat, 13 Mar 2021 10:36:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DDCE464F1B for ; Sat, 13 Mar 2021 10:36:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233462AbhCMKdg (ORCPT ); Sat, 13 Mar 2021 05:33:36 -0500 Received: from szxga07-in.huawei.com ([45.249.212.35]:14332 "EHLO szxga07-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230349AbhCMKdH (ORCPT ); Sat, 13 Mar 2021 05:33:07 -0500 Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4DyJr21hpjz8x8c; Sat, 13 Mar 2021 18:31:14 +0800 (CST) Received: from huawei.com (10.175.104.175) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.498.0; Sat, 13 Mar 2021 18:32:56 +0800 From: Miaohe Lin To: CC: , , , , , , , , , , , , , Subject: [PATCH 1/6] mm/huge_memory.c: rework the function vma_adjust_trans_huge() Date: Sat, 13 Mar 2021 05:32:19 -0500 Message-ID: <20210313103225.16607-2-linmiaohe@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20210313103225.16607-1-linmiaohe@huawei.com> References: <20210313103225.16607-1-linmiaohe@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.104.175] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The current implementation of vma_adjust_trans_huge() contains some duplicated codes. Add helper function to get rid of these codes to make it more succinct. Signed-off-by: Miaohe Lin --- mm/huge_memory.c | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index bff92dea5ab3..3303576489d5 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2301,6 +2301,14 @@ void split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address, __split_huge_pmd(vma, pmd, address, freeze, page); } +static inline void try_to_split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address) +{ + if (address & ~HPAGE_PMD_MASK && + range_in_vma(vma, address & HPAGE_PMD_MASK, + (address & HPAGE_PMD_MASK) + HPAGE_PMD_SIZE)) + split_huge_pmd_address(vma, address, false, NULL); +} + void vma_adjust_trans_huge(struct vm_area_struct *vma, unsigned long start, unsigned long end, @@ -2311,20 +2319,14 @@ void vma_adjust_trans_huge(struct vm_area_struct *vma, * previously contain an hugepage: check if we need to split * an huge pmd. */ - if (start & ~HPAGE_PMD_MASK && - (start & HPAGE_PMD_MASK) >= vma->vm_start && - (start & HPAGE_PMD_MASK) + HPAGE_PMD_SIZE <= vma->vm_end) - split_huge_pmd_address(vma, start, false, NULL); + try_to_split_huge_pmd_address(vma, start); /* * If the new end address isn't hpage aligned and it could * previously contain an hugepage: check if we need to split * an huge pmd. */ - if (end & ~HPAGE_PMD_MASK && - (end & HPAGE_PMD_MASK) >= vma->vm_start && - (end & HPAGE_PMD_MASK) + HPAGE_PMD_SIZE <= vma->vm_end) - split_huge_pmd_address(vma, end, false, NULL); + try_to_split_huge_pmd_address(vma, end); /* * If we're also updating the vma->vm_next->vm_start, if the new @@ -2335,10 +2337,7 @@ void vma_adjust_trans_huge(struct vm_area_struct *vma, struct vm_area_struct *next = vma->vm_next; unsigned long nstart = next->vm_start; nstart += adjust_next; - if (nstart & ~HPAGE_PMD_MASK && - (nstart & HPAGE_PMD_MASK) >= next->vm_start && - (nstart & HPAGE_PMD_MASK) + HPAGE_PMD_SIZE <= next->vm_end) - split_huge_pmd_address(next, nstart, false, NULL); + try_to_split_huge_pmd_address(next, nstart); } } -- 2.19.1