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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 422D1C433FE for ; Wed, 2 Mar 2022 01:40:05 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 9C3C88D0002; Tue, 1 Mar 2022 20:40:04 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 971598D0001; Tue, 1 Mar 2022 20:40:04 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 861BC8D0002; Tue, 1 Mar 2022 20:40:04 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.28]) by kanga.kvack.org (Postfix) with ESMTP id 77F5C8D0001 for ; Tue, 1 Mar 2022 20:40:04 -0500 (EST) Received: from smtpin12.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 479F820448 for ; Wed, 2 Mar 2022 01:40:04 +0000 (UTC) X-FDA: 79197740328.12.9802290 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by imf15.hostedemail.com (Postfix) with ESMTP id 747D6A0002 for ; Wed, 2 Mar 2022 01:40:03 +0000 (UTC) Received: from canpemm500002.china.huawei.com (unknown [172.30.72.53]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4K7cBJ2pFRz1GBwL; Wed, 2 Mar 2022 09:35:20 +0800 (CST) Received: from [10.174.177.76] (10.174.177.76) by canpemm500002.china.huawei.com (7.192.104.244) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Wed, 2 Mar 2022 09:39:58 +0800 Subject: Re: [PATCH 1/8] sched: coredump.h: clarify the use of MMF_VM_HUGEPAGE To: Yang Shi CC: Linux MM , Linux FS-devel Mailing List , , , Linux Kernel Mailing List , Vlastimil Babka , "Kirill A. Shutemov" , Song Liu , Rik van Riel , Matthew Wilcox , Zi Yan , Andrew Morton , Theodore Ts'o , Andreas Dilger , References: <20220228235741.102941-1-shy828301@gmail.com> <20220228235741.102941-2-shy828301@gmail.com> From: Miaohe Lin Message-ID: Date: Wed, 2 Mar 2022 09:39:58 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.174.177.76] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To canpemm500002.china.huawei.com (7.192.104.244) X-CFilter-Loop: Reflected X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 747D6A0002 X-Stat-Signature: bgs7ckianksehd3jza1bqhtkfa6a8dcd Authentication-Results: imf15.hostedemail.com; dkim=none; dmarc=pass (policy=quarantine) header.from=huawei.com; spf=pass (imf15.hostedemail.com: domain of linmiaohe@huawei.com designates 45.249.212.255 as permitted sender) smtp.mailfrom=linmiaohe@huawei.com X-HE-Tag: 1646185203-566715 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 2022/3/2 5:49, Yang Shi wrote: > On Tue, Mar 1, 2022 at 12:45 AM Miaohe Lin wrote: >> >> On 2022/3/1 7:57, Yang Shi wrote: >>> MMF_VM_HUGEPAGE is set as long as the mm is available for khugepaged by >>> khugepaged_enter(), not only when VM_HUGEPAGE is set on vma. Correct >>> the comment to avoid confusion. >>> >>> Signed-off-by: Yang Shi >>> --- >>> include/linux/sched/coredump.h | 3 ++- >>> 1 file changed, 2 insertions(+), 1 deletion(-) >>> >>> diff --git a/include/linux/sched/coredump.h b/include/linux/sched/coredump.h >>> index 4d9e3a656875..4d0a5be28b70 100644 >>> --- a/include/linux/sched/coredump.h >>> +++ b/include/linux/sched/coredump.h >>> @@ -57,7 +57,8 @@ static inline int get_dumpable(struct mm_struct *mm) >>> #endif >>> /* leave room for more dump flags */ >>> #define MMF_VM_MERGEABLE 16 /* KSM may merge identical pages */ >>> -#define MMF_VM_HUGEPAGE 17 /* set when VM_HUGEPAGE is set on vma */ >>> +#define MMF_VM_HUGEPAGE 17 /* set when mm is available for >>> + khugepaged */ >> >> I think this comment could be written in one line. Anyway, this patch looks good to me. >> Thanks. > > Yes, as long as we don't care about the 80 characters limit. I know > the limit was bumped to 100 by checkpatch, but I have seen 80 was > still preferred by a lot of people. I see. Many thanks for clarifying. > >> >> Reviewed-by: Miaohe Lin > > Thanks. > >> >>> /* >>> * This one-shot flag is dropped due to necessity of changing exe once again >>> * on NFS restore >>> >> > . >