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 80513C433F5 for ; Thu, 31 Mar 2022 02:47:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229765AbiCaCtB (ORCPT ); Wed, 30 Mar 2022 22:49:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45526 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229497AbiCaCsv (ORCPT ); Wed, 30 Mar 2022 22:48:51 -0400 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3247AF47D7 for ; Wed, 30 Mar 2022 19:47:02 -0700 (PDT) Received: from dggpemm500023.china.huawei.com (unknown [172.30.72.56]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4KTSMh0DxfzgYBv; Thu, 31 Mar 2022 10:45:20 +0800 (CST) Received: from dggpemm500001.china.huawei.com (7.185.36.107) by dggpemm500023.china.huawei.com (7.185.36.83) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Thu, 31 Mar 2022 10:46:59 +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 15.1.2308.21; Thu, 31 Mar 2022 10:46:59 +0800 From: Kefeng Wang To: , , , CC: , , Kefeng Wang Subject: [PATCH v2 0/3] arm64: mm: Do not defer reserve_crashkernel() Date: Thu, 31 Mar 2022 10:59:43 +0800 Message-ID: <20220331025946.51163-1-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: dggems706-chm.china.huawei.com (10.3.19.183) 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 Commit 031495635b46 ("arm64: Do not defer reserve_crashkernel() for platforms with no DMA memory zones"), this lets the kernel benifit due to BLOCK_MAPPINGS, we could do more if ZONE_DMA and ZONE_DMA32 enabled. 1) Don't defer reserve_crashkernel() if only ZONE_DMA32 2) Don't defer reserve_crashkernel() if ZONE_DMA with dma_force_32bit kernel parameter(newly added) Unixbench benchmark result shows between the block mapping and page mapping. ----------------+------------------+------------------- | block mapping | page mapping ----------------+------------------+------------------- Process Creation| 5,030.7 | 4,711.8 (in unixbench) | | ----------------+------------------+------------------- note: RODATA_FULL_DEFAULT_ENABLED is not enabled v2: - update patch1 according to Vijay and Florian, and RB of Vijay - add new patch2 Kefeng Wang (3): arm64: mm: Do not defer reserve_crashkernel() if only ZONE_DMA32 arm64: mm: Don't defer reserve_crashkernel() with dma_force_32bit arm64: mm: Cleanup useless parameters in zone_sizes_init() arch/arm64/include/asm/kexec.h | 1 + arch/arm64/mm/init.c | 59 +++++++++++++++++++++++++--------- arch/arm64/mm/mmu.c | 6 ++-- 3 files changed, 46 insertions(+), 20 deletions(-) -- 2.26.2