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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3D0F7C433FE for ; Fri, 10 Sep 2021 05:30:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2637561153 for ; Fri, 10 Sep 2021 05:30:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230361AbhIJFb1 (ORCPT ); Fri, 10 Sep 2021 01:31:27 -0400 Received: from szxga03-in.huawei.com ([45.249.212.189]:16248 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230352AbhIJFbY (ORCPT ); Fri, 10 Sep 2021 01:31:24 -0400 Received: from dggemv711-chm.china.huawei.com (unknown [172.30.72.55]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4H5PZV6MDcz8stp; Fri, 10 Sep 2021 13:29:38 +0800 (CST) Received: from dggpemm500001.china.huawei.com (7.185.36.107) by dggemv711-chm.china.huawei.com (10.1.198.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Fri, 10 Sep 2021 13:30:10 +0800 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 15.1.2308.8; Fri, 10 Sep 2021 13:30:09 +0800 From: Kefeng Wang To: , , , , , , , , , , CC: , Kefeng Wang Subject: [PATCH v4 0/3] arm64: support page mapping percpu first chunk allocator Date: Fri, 10 Sep 2021 13:33:51 +0800 Message-ID: <20210910053354.26721-1-wangkefeng.wang@huawei.com> X-Mailer: git-send-email 2.26.2 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 Percpu embedded first chunk allocator is the firstly option, but it could fails on ARM64, eg, "percpu: max_distance=0x5fcfdc640000 too large for vmalloc space 0x781fefff0000" "percpu: max_distance=0x600000540000 too large for vmalloc space 0x7dffb7ff0000" "percpu: max_distance=0x5fff9adb0000 too large for vmalloc space 0x5dffb7ff0000" then we could meet "WARNING: CPU: 15 PID: 461 at vmalloc.c:3087 pcpu_get_vm_areas+0x488/0x838", even the system could not boot successfully. Let's implement page mapping percpu first chunk allocator as a fallback to the embedding allocator to increase the robustness of the system. Also fix a crash when both NEED_PER_CPU_PAGE_FIRST_CHUNK and KASAN_VMALLOC enabled. Tested on ARM64 qemu with cmdline "percpu_alloc=page" based on v5.14. V4: - add ACK/RB - address comments about patch1 from Catalin - add Greg and Andrew into list suggested by Catalin v3: - search for a range that fits instead of always picking the end from vmalloc area suggested by Catalin. - use NUMA_NO_NODE to avoid "virt_to_phys used for non-linear address:" issue in arm64 kasan_populate_early_vm_area_shadow(). - add Acked-by: Marco Elver to patch v3 V2: - fix build error when CONFIG_KASAN disabled, found by lkp@intel.com - drop wrong __weak comment from kasan_populate_early_vm_area_shadow(), found by Marco Elver Kefeng Wang (3): vmalloc: Choose a better start address in vm_area_register_early() arm64: Support page mapping percpu first chunk allocator kasan: arm64: Fix pcpu_page_first_chunk crash with KASAN_VMALLOC arch/arm64/Kconfig | 4 ++ arch/arm64/mm/kasan_init.c | 16 ++++++++ drivers/base/arch_numa.c | 82 +++++++++++++++++++++++++++++++++----- include/linux/kasan.h | 6 +++ mm/kasan/init.c | 5 +++ mm/vmalloc.c | 19 ++++++--- 6 files changed, 116 insertions(+), 16 deletions(-) -- 2.26.2