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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A4AC5C433EF for ; Tue, 12 Oct 2021 18:21:31 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3618B60ED4 for ; Tue, 12 Oct 2021 18:21:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 3618B60ED4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 8FDAB900003; Tue, 12 Oct 2021 14:21:30 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 8ACEC900002; Tue, 12 Oct 2021 14:21:30 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7C2A0900003; Tue, 12 Oct 2021 14:21:30 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0009.hostedemail.com [216.40.44.9]) by kanga.kvack.org (Postfix) with ESMTP id 6BBB4900002 for ; Tue, 12 Oct 2021 14:21:30 -0400 (EDT) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 259D982499B9 for ; Tue, 12 Oct 2021 18:21:30 +0000 (UTC) X-FDA: 78688603140.18.644C2F3 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf19.hostedemail.com (Postfix) with ESMTP id DD5F5B0000A7 for ; Tue, 12 Oct 2021 18:21:29 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 37ACB60D07; Tue, 12 Oct 2021 18:21:24 +0000 (UTC) Date: Tue, 12 Oct 2021 19:21:20 +0100 From: Catalin Marinas To: Kefeng Wang Cc: will@kernel.org, ryabinin.a.a@gmail.com, andreyknvl@gmail.com, dvyukov@google.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, elver@google.com, akpm@linux-foundation.org, gregkh@linuxfoundation.org, kasan-dev@googlegroups.com Subject: Re: [PATCH v4 1/3] vmalloc: Choose a better start address in vm_area_register_early() Message-ID: References: <20210910053354.26721-1-wangkefeng.wang@huawei.com> <20210910053354.26721-2-wangkefeng.wang@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210910053354.26721-2-wangkefeng.wang@huawei.com> X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: DD5F5B0000A7 X-Stat-Signature: tsrs638pd9nrx7tw873oosi9uqqojwii Authentication-Results: imf19.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none); spf=pass (imf19.hostedemail.com: domain of cmarinas@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=cmarinas@kernel.org X-HE-Tag: 1634062889-126640 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: On Fri, Sep 10, 2021 at 01:33:52PM +0800, Kefeng Wang wrote: > There are some fixed locations in the vmalloc area be reserved > in ARM(see iotable_init()) and ARM64(see map_kernel()), but for > pcpu_page_first_chunk(), it calls vm_area_register_early() and > choose VMALLOC_START as the start address of vmap area which > could be conflicted with above address, then could trigger a > BUG_ON in vm_area_add_early(). > > Let's choose a suit start address by traversing the vmlist. > > Signed-off-by: Kefeng Wang Reviewed-by: Catalin Marinas