From mboxrd@z Thu Jan 1 00:00:00 1970 From: cuibixuan@huawei.com (Bixuan Cui) Date: Tue, 17 Oct 2017 13:54:35 +0800 Subject: =?UTF-8?B?44CQQlVH44CRVGhlIGtlcm5lbCBzdGFydCBmYWlsIHdoZW4gZW5hYmw=?= =?UTF-8?B?ZSBDT05GSUdfQVJNNjRfTFNFX0FUT01JQ1MgYW5kIEtDT1ZfSU5TVFJVTUVOVF8=?= =?UTF-8?B?QUxM?= Message-ID: <59E59B1B.9030206@huawei.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi, I try to start the kernel(v4.14.0-rc4) by qemu while enable CONFIG_ARM64_LSE_ATOMICS and KCOV_INSTRUMENT_ALL(use arch/arm64/configs/defconfig) at the same time. Then it hang: qemu-system-aarch64 -kernel Image -m 2048 -smp 8 -initrd qemu-le.rootfs -cpu cortex-a57 -nographic -machine virt,kernel_irqchip=on -append 'console=ttyAMA0 root=/dev/ram rdinit=/sbin/init nohz_full=1 earlycon=pl011,0x9000000' -rtc base=localtime -device virtio-net-device,netdev=net0 -netdev type=tap,id=net0,script=no,downscript=no,ifname=tap2 [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 4.14.0-rc4 #24 SMP PREEMPT Mon Oct 16 11:02:11 CST 2017 [ 0.000000] Boot CPU: AArch64 Processor [411fd070] [ 0.000000] Machine model: linux,dummy-virt [ 0.000000] earlycon: pl11 at MMIO 0x0000000009000000 (options '') [ 0.000000] bootconsole [pl11] enabled [ 0.000000] efi: Getting EFI parameters from FDT: [ 0.000000] efi: UEFI not found. [ 0.000000] cma: Reserved 64 MiB at 0x00000000bc000000 After I try kernel v4.13 and it's the same result. I trace the code and find it stop at the end of '__init_single_page(page, pfn, zone, nid)' in memmap_init_zone() of mm/page_alloc.c ? static void __meminit __init_single_page(struct page *page, unsigned long pfn, unsigned long zone, int nid) { set_page_links(page, zone, nid, pfn); init_page_count(page); page_mapcount_reset(page); page_cpupid_reset_last(page); INIT_LIST_HEAD(&page->lru); #ifdef WANT_PAGE_VIRTUAL /* The shift won't overflow because ZONE_NORMAL is below 4G. */ if (!is_highmem_idx(zone)) set_page_address(page, __va(pfn << PAGE_SHIFT)); #endif // printk("stop here\n"); } Anyone can give me advice? Thanks, Bixuan Cui From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933555AbdJQFzB (ORCPT ); Tue, 17 Oct 2017 01:55:01 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:8497 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932639AbdJQFzA (ORCPT ); Tue, 17 Oct 2017 01:55:00 -0400 Message-ID: <59E59B1B.9030206@huawei.com> Date: Tue, 17 Oct 2017 13:54:35 +0800 From: Bixuan Cui User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130801 Thunderbird/17.0.8 MIME-Version: 1.0 To: CC: , "Libin (Huawei)" Subject: =?UTF-8?B?44CQQlVH44CRVGhlIGtlcm5lbCBzdGFydCBmYWlsIHdoZW4gZW5hYmw=?= =?UTF-8?B?ZSBDT05GSUdfQVJNNjRfTFNFX0FUT01JQ1MgYW5kIEtDT1ZfSU5TVFJVTUVOVF8=?= =?UTF-8?B?QUxM?= Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-Originating-IP: [10.177.222.129] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020202.59E59B30.007A,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 8e412866ad03191302253d9b2d10c70b Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I try to start the kernel(v4.14.0-rc4) by qemu while enable CONFIG_ARM64_LSE_ATOMICS and KCOV_INSTRUMENT_ALL(use arch/arm64/configs/defconfig) at the same time. Then it hang: qemu-system-aarch64 -kernel Image -m 2048 -smp 8 -initrd qemu-le.rootfs -cpu cortex-a57 -nographic -machine virt,kernel_irqchip=on -append 'console=ttyAMA0 root=/dev/ram rdinit=/sbin/init nohz_full=1 earlycon=pl011,0x9000000' -rtc base=localtime -device virtio-net-device,netdev=net0 -netdev type=tap,id=net0,script=no,downscript=no,ifname=tap2 [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 4.14.0-rc4 #24 SMP PREEMPT Mon Oct 16 11:02:11 CST 2017 [ 0.000000] Boot CPU: AArch64 Processor [411fd070] [ 0.000000] Machine model: linux,dummy-virt [ 0.000000] earlycon: pl11 at MMIO 0x0000000009000000 (options '') [ 0.000000] bootconsole [pl11] enabled [ 0.000000] efi: Getting EFI parameters from FDT: [ 0.000000] efi: UEFI not found. [ 0.000000] cma: Reserved 64 MiB at 0x00000000bc000000 After I try kernel v4.13 and it's the same result. I trace the code and find it stop at the end of '__init_single_page(page, pfn, zone, nid)' in memmap_init_zone() of mm/page_alloc.c ： static void __meminit __init_single_page(struct page *page, unsigned long pfn, unsigned long zone, int nid) { set_page_links(page, zone, nid, pfn); init_page_count(page); page_mapcount_reset(page); page_cpupid_reset_last(page); INIT_LIST_HEAD(&page->lru); #ifdef WANT_PAGE_VIRTUAL /* The shift won't overflow because ZONE_NORMAL is below 4G. */ if (!is_highmem_idx(zone)) set_page_address(page, __va(pfn << PAGE_SHIFT)); #endif // printk("stop here\n"); } Anyone can give me advice? Thanks, Bixuan Cui