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[2620:137:e000::1:20]) by mx.google.com with ESMTP id r30-20020a63205e000000b00460b9d08d7bsi30516378pgm.868.2022.10.23.06.39.33; Sun, 23 Oct 2022 06:39:46 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=AVFtjHfS; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230182AbiJWNeR (ORCPT + 99 others); Sun, 23 Oct 2022 09:34:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48484 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230518AbiJWNeG (ORCPT ); Sun, 23 Oct 2022 09:34:06 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AB0A93AE49; Sun, 23 Oct 2022 06:34:02 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 2B2C0B80BFF; Sun, 23 Oct 2022 13:34:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1D109C43470; Sun, 23 Oct 2022 13:33:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1666532040; bh=HgCI1fwpCRV6cbIVNToGS+BLd1ULTdQix8qchtvlux4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AVFtjHfSb8Pix+ZODNxlJQR5O5aUXDkMSRquLor3ywU7ifraASh1B9mCOEjvSpmhi 5pwloxojUVQPEPJ2nXi5g1JVDuDE1h3HpRLY42daghXEUPTF7NpE69kjP4CO1wc0ML OzbFYnrf6HzV8oxKV1yp5MMhWhLI4SLmS2V+DRTzZxBvEFKaEvXBlJ6KnhO+lYL3dI 1IWrS6h4wVbfMAXen6V8wN5llaAW/lK3lOeEvN7oClwG3ggzWrMfgYvsVvCq5yv/EB qeU0OFXs587rqByUX1KKY/7/nHUUujPncosY2MQnzIcadA2hayGkXIyo9eL+kUJ0RU yMZXSDWBeTMUQ== From: guoren@kernel.org To: guoren@kernel.org, palmer@dabbelt.com, palmer@rivosinc.com, heiko@sntech.de, arnd@arndb.de, songmuchun@bytedance.com, catalin.marinas@arm.com, chenhuacai@loongson.cn, Conor.Dooley@microchip.com, paul.walmsley@sifive.com, aou@eecs.berkeley.edu Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-mm@kvack.org, Guo Ren Subject: [PATCH 2/2] riscv: Enable ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP Date: Sun, 23 Oct 2022 09:32:05 -0400 Message-Id: <20221023133205.3493564-3-guoren@kernel.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20221023133205.3493564-1-guoren@kernel.org> References: <20221023133205.3493564-1-guoren@kernel.org> MIME-Version: 1.0 X-Spam-Status: No, score=-7.6 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1747485863976672291?= X-GMAIL-MSGID: =?utf-8?q?1747485863976672291?= From: Guo Ren This patch enable the feature of "free some vmemmap pages of HugeTLB page" [1]. To make it work correct, we also need fixup PG_dcache_clean setting for huge page [2]. [1] https://lore.kernel.org/linux-doc/20210510030027.56044-1-songmuchun@bytedance.com/ [2] https://lore.kernel.org/linux-mm/20220302084624.33340-1-songmuchun@bytedance.com/ Signed-off-by: Guo Ren Signed-off-by: Guo Ren Cc: Muchun Song Cc: Huacai Chen Cc: Arnd Bergmann Acked-by: Muchun Song --- arch/riscv/Kconfig | 1 + arch/riscv/include/asm/cacheflush.h | 3 +++ arch/riscv/mm/cacheflush.c | 3 +++ 3 files changed, 7 insertions(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 6b48a3ae9843..81ac25b0e005 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -45,6 +45,7 @@ config RISCV select ARCH_WANT_FRAME_POINTERS select ARCH_WANT_GENERAL_HUGETLB select ARCH_WANT_HUGE_PMD_SHARE if 64BIT + select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP select ARCH_WANTS_THP_SWAP if HAVE_ARCH_TRANSPARENT_HUGEPAGE select BINFMT_FLAT_NO_DATA_START_OFFSET if !MMU select BUILDTIME_TABLE_SORT if MMU diff --git a/arch/riscv/include/asm/cacheflush.h b/arch/riscv/include/asm/cacheflush.h index 8a5c246b0a21..96f7381aeeeb 100644 --- a/arch/riscv/include/asm/cacheflush.h +++ b/arch/riscv/include/asm/cacheflush.h @@ -17,6 +17,9 @@ static inline void local_flush_icache_all(void) static inline void flush_dcache_page(struct page *page) { + if (PageHuge(page)) + page = compound_head(page); + if (test_bit(PG_dcache_clean, &page->flags)) clear_bit(PG_dcache_clean, &page->flags); } diff --git a/arch/riscv/mm/cacheflush.c b/arch/riscv/mm/cacheflush.c index 7c9f97fa3938..ca35807cf185 100644 --- a/arch/riscv/mm/cacheflush.c +++ b/arch/riscv/mm/cacheflush.c @@ -82,6 +82,9 @@ void flush_icache_pte(pte_t pte) { struct page *page = pte_page(pte); + if (PageHuge(page)) + page = compound_head(page); + if (!test_bit(PG_dcache_clean, &page->flags)) { flush_icache_all(); set_bit(PG_dcache_clean, &page->flags);