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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6F495C0015E for ; Thu, 13 Jul 2023 09:39:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234031AbjGMJjM (ORCPT ); Thu, 13 Jul 2023 05:39:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58346 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233989AbjGMJjJ (ORCPT ); Thu, 13 Jul 2023 05:39:09 -0400 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6EF182102; Thu, 13 Jul 2023 02:39:07 -0700 (PDT) Received: from dggpemm500001.china.huawei.com (unknown [172.30.72.55]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4R1qKw75b5z18MBd; Thu, 13 Jul 2023 17:38:28 +0800 (CST) Received: from localhost.localdomain.localdomain (10.175.113.25) by dggpemm500001.china.huawei.com (7.185.36.107) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Thu, 13 Jul 2023 17:39:03 +0800 From: Kefeng Wang To: , Andrew Morton , CC: Russell King , Catalin Marinas , Will Deacon , Huacai Chen , WANG Xuerui , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , , , , , , , , Kefeng Wang Subject: [PATCH rfc -next 00/10] mm: convert to generic VMA lock-based page fault Date: Thu, 13 Jul 2023 17:51:55 +0800 Message-ID: <20230713095155.189443-1-wangkefeng.wang@huawei.com> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.113.25] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To dggpemm500001.china.huawei.com (7.185.36.107) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a generic VMA lock-based page fault handler in mm core, and convert architectures to use it, which eliminate architectures's duplicated codes. With it, we can avoid multiple changes in architectures's code if we add new feature or bugfix. This fixes riscv missing change about commit 38b3aec8e8d2 "mm: drop per-VMA lock when returning VM_FAULT_RETRY or VM_FAULT_COMPLETED", and in the end, we enable this feature on ARM32/Loongarch too. This is based on next-20230713, only built test(no loongarch compiler, so except loongarch). Kefeng Wang (10): mm: add a generic VMA lock-based page fault handler x86: mm: use try_vma_locked_page_fault() arm64: mm: use try_vma_locked_page_fault() s390: mm: use try_vma_locked_page_fault() powerpc: mm: use try_vma_locked_page_fault() riscv: mm: use try_vma_locked_page_fault() ARM: mm: try VMA lock-based page fault handling first loongarch: mm: cleanup __do_page_fault() loongarch: mm: add access_error() helper loongarch: mm: try VMA lock-based page fault handling first arch/arm/Kconfig | 1 + arch/arm/mm/fault.c | 15 ++++++- arch/arm64/mm/fault.c | 28 +++--------- arch/loongarch/Kconfig | 1 + arch/loongarch/mm/fault.c | 92 ++++++++++++++++++++++++--------------- arch/powerpc/mm/fault.c | 54 ++++++++++------------- arch/riscv/mm/fault.c | 38 +++++++--------- arch/s390/mm/fault.c | 23 +++------- arch/x86/mm/fault.c | 39 +++++++---------- include/linux/mm.h | 28 ++++++++++++ mm/memory.c | 42 ++++++++++++++++++ 11 files changed, 206 insertions(+), 155 deletions(-) -- 2.27.0