From patchwork Mon Feb 28 06:35:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12762418 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6029FC433EF for ; Mon, 28 Feb 2022 06:36:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233258AbiB1Ggx (ORCPT ); Mon, 28 Feb 2022 01:36:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231190AbiB1Ggv (ORCPT ); Mon, 28 Feb 2022 01:36:51 -0500 Received: from mail-pj1-x1032.google.com (mail-pj1-x1032.google.com [IPv6:2607:f8b0:4864:20::1032]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 443AF66CBE for ; Sun, 27 Feb 2022 22:36:11 -0800 (PST) Received: by mail-pj1-x1032.google.com with SMTP id em10-20020a17090b014a00b001bc3071f921so13892844pjb.5 for ; Sun, 27 Feb 2022 22:36:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=eiCDiO7SeVqlcAe7b/JTkNhJRMnMslj9oR2/HG6e9n8=; b=hNvJJ0ezpU6tq5crtKQjZkvHgC7+HknHsNaTEEdgZR8JxxtwLFGoDAyD7x5IwET35y ZPRng5dZP2a5eK9ia13pSI2xguMnF9Za8S99u0xgEEo87HHYB2P4Xej2LVHL7eH+AKct xrxdslSfTa0qiPzYYh9Uj7RiCdwmZhmN4QcvdcS4l0U5en87upCMi2dRj4MX+zYpyYdE 9bx2sftxHiohg9+NFs058WNmeoDpjma0q+zV41eABj5OLtmklp0RsU+byN9O8I5+y/Bh tS+HxIBYiIWT8UFKIb4XxBS4fOT1yRMgLmmi9yUSb3Xpk4yxR/XN6G6R+JLCWfBCibNi H5ag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=eiCDiO7SeVqlcAe7b/JTkNhJRMnMslj9oR2/HG6e9n8=; b=e3f+LbkNFdfULGbxokPQwv165PcAZDuThLMil8jSgZAnqY9ppET6voi5+GTTGo+d01 /ouMCTxOWY9uY36Ux5dT46bK2IqiHMHlGnNOxAiQN+HINo+cyA6WDaEyZXWyx87Et/Vr 5G4otJ3/6UVGwTHmNpnqmbDh6C9zrjUygRb4xzga9GTgl7pOHRS8HH42jpE5U+CMI4rv WRGrI1IQpFFb6sIkCfOsQk9wWlc77Wp5wF4elfsiH//S4Q3tUKMNhBeLtSPCzrC6J3CU eO+pIseaQqdtCsWJDnNSZlfZwwY+dJKgsMd+2FExsCC9J3u3lOQSjrsOyZcMRpR4jmHE 4ggA== X-Gm-Message-State: AOAM530SrrTcOIHm+EA9H6n1Sm59oioM0tBtN2MQoPcidfgwjdG6oS6/ AI0TVxO5uALkDbmySHQRA+BSwA== X-Google-Smtp-Source: ABdhPJzWNg+jqXhXX9lmsTizHuYtvGyPT0fg3+W582PsfWEVtMonxYeOPpLeTi3y6GAcOQpWl4KCZw== X-Received: by 2002:a17:902:ce8d:b0:150:1d25:694 with SMTP id f13-20020a170902ce8d00b001501d250694mr17105506plg.36.1646030170821; Sun, 27 Feb 2022 22:36:10 -0800 (PST) Received: from FVFYT0MHHV2J.tiktokcdn.com ([139.177.225.227]) by smtp.gmail.com with ESMTPSA id q13-20020aa7960d000000b004f13804c100sm11126472pfg.165.2022.02.27.22.36.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Feb 2022 22:36:10 -0800 (PST) From: Muchun Song To: dan.j.williams@intel.com, willy@infradead.org, jack@suse.cz, viro@zeniv.linux.org.uk, akpm@linux-foundation.org, apopple@nvidia.com, shy828301@gmail.com, rcampbell@nvidia.com, hughd@google.com, xiyuyang19@fudan.edu.cn, kirill.shutemov@linux.intel.com, zwisler@kernel.org, hch@infradead.org Cc: linux-fsdevel@vger.kernel.org, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org, duanxiongchun@bytedance.com, smuchun@gmail.com, Muchun Song Subject: [PATCH v3 2/6] dax: fix cache flush on PMD-mapped pages Date: Mon, 28 Feb 2022 14:35:32 +0800 Message-Id: <20220228063536.24911-3-songmuchun@bytedance.com> X-Mailer: git-send-email 2.32.0 (Apple Git-132) In-Reply-To: <20220228063536.24911-1-songmuchun@bytedance.com> References: <20220228063536.24911-1-songmuchun@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org The flush_cache_page() only remove a PAGE_SIZE sized range from the cache. However, it does not cover the full pages in a THP except a head page. Replace it with flush_cache_range() to fix this issue. Fixes: f729c8c9b24f ("dax: wrprotect pmd_t in dax_mapping_entry_mkclean") Signed-off-by: Muchun Song --- fs/dax.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/dax.c b/fs/dax.c index 67a08a32fccb..a372304c9695 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -845,7 +845,8 @@ static void dax_entry_mkclean(struct address_space *mapping, pgoff_t index, if (!pmd_dirty(*pmdp) && !pmd_write(*pmdp)) goto unlock_pmd; - flush_cache_page(vma, address, pfn); + flush_cache_range(vma, address, + address + HPAGE_PMD_SIZE); pmd = pmdp_invalidate(vma, address, pmdp); pmd = pmd_wrprotect(pmd); pmd = pmd_mkclean(pmd);