From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752704AbbDBGCQ (ORCPT ); Thu, 2 Apr 2015 02:02:16 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56769 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751868AbbDBGCP (ORCPT ); Thu, 2 Apr 2015 02:02:15 -0400 Message-ID: <551CDB2A.5060604@redhat.com> Date: Thu, 02 Apr 2015 11:31:14 +0530 From: Pratyush Anand User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 MIME-Version: 1.0 To: AKASHI Takahiro , catalin.marinas@arm.com, will.deacon@arm.com, vgoyal@redhat.com, hbabus@us.ibm.com CC: linaro-kernel@lists.linaro.org, geoff@infradead.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, broonie@kernel.org, david.griego@linaro.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 0/5] arm64: add kdump support References: <1427358533-3754-1-git-send-email-takahiro.akashi@linaro.org> <551C1537.2030009@redhat.com> <551C7EF5.9030806@linaro.org> <551CCC67.1040607@redhat.com> <551CD58E.60807@linaro.org> In-Reply-To: <551CD58E.60807@linaro.org> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thursday 02 April 2015 11:07 AM, AKASHI Takahiro wrote: > Pratyush, > > On 04/02/2015 01:58 PM, Pratyush Anand wrote: >> >> >> On Thursday 02 April 2015 04:57 AM, AKASHI Takahiro wrote: >>> Please try my latest kexec-tools in my linaro repo (branch name is >>> kdump/v0.11) >>> and let me know the result. >> >> Thanks a lot.. Just fetched your repo and found v.0.11. >> >> With this crash kernel loaded successfully, if I do not use initrd. >> >> With following I still see Overlapping memory segments >> >> kexec -p /home/panand/work/kernel/bsa2_kdump/vmlinux >> --initrd=/boot/initramfs-3.19.0.bz1198945+.img --append="$( cat >> /proc/cmdline ) maxcpus=1 mem=64M reset_devices" > > How big is your initrd? > If it is good small, please tell me segments info, or messages from > add_segment_phys_virt() > for all the segments. > add_segment_phys_virt: 000000000dcd0b90 - 000000000dcd0f90 (00000400) -> 00000040c3ff0000 - 00000040c4000000 (00010000) add_segment_phys_virt: 000003ff88c10010 - 000003ff8984a010 (00c3a000) -> 00000040c0080000 - 00000040c1310000 (01290000) add_segment_phys_virt: 000000000dcd53c0 - 000000000dcd96b8 (000042f8) -> 00000040c0000000 - 00000040c0010000 (00010000) add_segment_phys_virt: 000003ff87360010 - 000003ff88bfcc2f (0189cc1f) -> 00000040c0010000 - 00000040c18b0000 (018a0000) Overlapping memory segments at 0x40c18b0000 sort_segments failed Why do we try to fit dtb just after crash_reserved_mem.start. Should n't it should start after crash_reserved_mem.start + arm64_mem.text_offset + arm64_mem.image_size I tried following and it works perfectly: diff --git a/kexec/arch/arm64/crashdump-arm64.c b/kexec/arch/arm64/crashdump-arm64.c index 41266f294589..75f4e4d269ca 100644 --- a/kexec/arch/arm64/crashdump-arm64.c +++ b/kexec/arch/arm64/crashdump-arm64.c @@ -312,5 +312,6 @@ void set_crash_entry(struct mem_ehdr *ehdr, struct kexec_info *info) off_t locate_dtb_in_crashmem(struct kexec_info *info, off_t dtb_size) { return locate_hole(info, dtb_size, 128UL * 1024, - crash_reserved_mem.start, crash_reserved_mem.end, 1); + crash_reserved_mem.start + arm64_mem.text_offset + + arm64_mem.image_size, crash_reserved_mem.end, 1); } With this changes new allocations are: add_segment_phys_virt: 0000000010350b90 - 0000000010350f90 (00000400) -> 00000040c3ff0000 - 00000040c4000000 (00010000) add_segment_phys_virt: 000003ff7ad70010 - 000003ff7b9aa010 (00c3a000) -> 00000040c0080000 - 00000040c1310000 (01290000) add_segment_phys_virt: 00000000103553c0 - 00000000103596b8 (000042f8) -> 00000040c1360000 - 00000040c1370000 (00010000) add_segment_phys_virt: 000003ff794c0010 - 000003ff7ad5cc2f (0189cc1f) -> 00000040c1370000 - 00000040c2c10000 (018a0000) add_segment_phys_virt: 00000000103596c0 - 0000000010360190 (00006ad0) -> 00000040c2c10000 - 00000040c2c20000 (00010000) Crash kernel loaded upon panic. ~Pratyush