From patchwork Mon Feb 28 06:35:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12762410 Received: from mail-pj1-f42.google.com (mail-pj1-f42.google.com [209.85.216.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6E832512D for ; Mon, 28 Feb 2022 06:36:04 +0000 (UTC) Received: by mail-pj1-f42.google.com with SMTP id bx5so10251264pjb.3 for ; Sun, 27 Feb 2022 22:36:04 -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=dOhvmpBLieRVF+NKQPb4pdavGDEjnXCIzLlMLWWpOKA=; b=GLedueKeHKRO2HkdYcdfxC2EEpOAVOh+ibI1MzEf9M9KEnYukSMBeJqZ6sb5fecmh9 R8NyktTgdG0x5Z8DW9eNTXhARk8wE61mQcydrkh0HLuj7P7SeO0WwM/sBC8K98q6OP8p IERc1o2vniYjYyIE4NkC+baW8ic1VU7rpHUmGU5X0QD3luAibl2XNs9c4D80ydzqjHWn CNW9quMGgyhAf8u7OKUuHd1KuzjLgHeLvTZVSUX8Gy0+kfVcWJG0BWoIhvOQtOdv6srh 0mxLOeOYimflwRkRO1fDCadVjMJE3S4xQwk2h0AlhCmAyM7v6XyS7tsYSsMRtXgj2QsO WnwA== 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=dOhvmpBLieRVF+NKQPb4pdavGDEjnXCIzLlMLWWpOKA=; b=etnrtFZd8B9KvethV0pZBjkujOCtROSJIYM6wnE7AND9aezKURRuu7Tf8EX45zeI31 HY+JL1iG1GAlqMcaPn516BBJxEC0+uXU36B2IlGHFeOC7krO2xFKio+Pvi9neOsrBRaN mmoIwPv5nvSUCckvlW/CCb78vOhAlF/8EQEnAjpFjeiPsQGECXXGIg+0L/Oi8fpy1ocq 0gfPhw2D68cA6HDoSgusmYROF6rSOpM21wHqvp6j9JwO+cdIWXC9n8Fv38LPFA+BQ5pk 0fswu+XJV+LHdS+6mxdcSYrZBl1MRT1RLRV3AHa5slSPPDGHj7fBmI3lDxPhKZ7ZmqDi GUrw== X-Gm-Message-State: AOAM532cQttWvp/zuk1iH965kxiawnysA2N3QnMVWU7LEISEtr+oTXdj 1ILN9kdHjnAgmXe4zL0zJXpghA== X-Google-Smtp-Source: ABdhPJwToVZOj3y/qJS6gPvMQ/JUzaojXn+cxmZ3XptNaVSIvdrv3PQbOne/2kTWhsRv6czal7dTHw== X-Received: by 2002:a17:902:d882:b0:14f:efee:6de0 with SMTP id b2-20020a170902d88200b0014fefee6de0mr19598400plz.116.1646030163867; Sun, 27 Feb 2022 22:36:03 -0800 (PST) Received: from FVFYT0MHHV2J.tiktokcdn.com ([139.177.225.227]) by smtp.gmail.com with ESMTPSA id q13-20020aa7960d000000b004f13804c100sm11126472pfg.165.2022.02.27.22.35.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Feb 2022 22:36:03 -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 1/6] mm: rmap: fix cache flush on THP pages Date: Mon, 28 Feb 2022 14:35:31 +0800 Message-Id: <20220228063536.24911-2-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> Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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. At least, no problems were found due to this. Maybe because the architectures that have virtual indexed caches is less. Fixes: f27176cfc363 ("mm: convert page_mkclean_one() to use page_vma_mapped_walk()") Signed-off-by: Muchun Song Reviewed-by: Yang Shi --- mm/rmap.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/rmap.c b/mm/rmap.c index fc46a3d7b704..723682ddb9e8 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -970,7 +970,8 @@ static bool page_mkclean_one(struct folio *folio, struct vm_area_struct *vma, if (!pmd_dirty(*pmd) && !pmd_write(*pmd)) continue; - flush_cache_page(vma, address, folio_pfn(folio)); + flush_cache_range(vma, address, + address + HPAGE_PMD_SIZE); entry = pmdp_invalidate(vma, address, pmd); entry = pmd_wrprotect(entry); entry = pmd_mkclean(entry);