From patchwork Tue Jul 20 02:51:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kefeng Wang X-Patchwork-Id: 12387363 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=-11.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 32C9EC07E9B for ; Tue, 20 Jul 2021 02:44:39 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A8C2760FE4 for ; Tue, 20 Jul 2021 02:44:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A8C2760FE4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 45DE18D0005; Mon, 19 Jul 2021 22:44:38 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 431BB8D0001; Mon, 19 Jul 2021 22:44:38 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 087328D0002; Mon, 19 Jul 2021 22:44:37 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0049.hostedemail.com [216.40.44.49]) by kanga.kvack.org (Postfix) with ESMTP id CF1278D0002 for ; Mon, 19 Jul 2021 22:44:37 -0400 (EDT) Received: from smtpin04.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 525EC184C215B for ; Tue, 20 Jul 2021 02:44:36 +0000 (UTC) X-FDA: 78381422952.04.A6DD376 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by imf29.hostedemail.com (Postfix) with ESMTP id 8DC459000273 for ; Tue, 20 Jul 2021 02:44:35 +0000 (UTC) Received: from dggemv704-chm.china.huawei.com (unknown [172.30.72.53]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4GTNHp4wvqz7wx5; Tue, 20 Jul 2021 10:40:54 +0800 (CST) Received: from dggpemm500001.china.huawei.com (7.185.36.107) by dggemv704-chm.china.huawei.com (10.3.19.47) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Tue, 20 Jul 2021 10:44:31 +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 15.1.2176.2; Tue, 20 Jul 2021 10:44:30 +0800 From: Kefeng Wang To: Catalin Marinas , Will Deacon , Andrey Ryabinin , Andrey Konovalov , Dmitry Vyukov CC: , , , , Kefeng Wang Subject: [PATCH v2 0/3] arm64: support page mapping percpu first chunk allocator Date: Tue, 20 Jul 2021 10:51:02 +0800 Message-ID: <20210720025105.103680-1-wangkefeng.wang@huawei.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 X-Originating-IP: [10.175.113.25] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To dggpemm500001.china.huawei.com (7.185.36.107) X-CFilter-Loop: Reflected X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 8DC459000273 X-Stat-Signature: eaxz4iy6zkauskhh94j6pncqfpnwyu8k Authentication-Results: imf29.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=huawei.com; spf=pass (imf29.hostedemail.com: domain of wangkefeng.wang@huawei.com designates 45.249.212.188 as permitted sender) smtp.mailfrom=wangkefeng.wang@huawei.com X-HE-Tag: 1626749075-854393 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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-rc2. 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 | 17 ++++++++ drivers/base/arch_numa.c | 82 +++++++++++++++++++++++++++++++++----- include/linux/kasan.h | 6 +++ mm/kasan/init.c | 5 +++ mm/vmalloc.c | 9 +++-- 6 files changed, 110 insertions(+), 13 deletions(-)