From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Message-ID: <57B70AF8.1000603@arm.com> Date: Fri, 19 Aug 2016 14:34:48 +0100 From: James Morse MIME-Version: 1.0 Subject: Re: [PATCH] fixup! arm64: kdump: add kdump support References: <57B2E759.201@arm.com> <1471448011-20386-1-git-send-email-james.morse@arm.com> <20160819080020.GA584@localhost.localdomain> In-Reply-To: <20160819080020.GA584@localhost.localdomain> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Pratyush Anand Cc: mark.rutland@arm.com, geoff@infradead.org, catalin.marinas@arm.com, will.deacon@arm.com, AKASHI Takahiro , bauerman@linux.vnet.ibm.com, dyoung@redhat.com, kexec@lists.infradead.org, linux-arm-kernel@lists.infradead.org On 19/08/16 09:00, Pratyush Anand wrote: > On 17/08/2016:04:33:31 PM, James Morse wrote: >> copy_oldmem_page() and mmap_vmcore() provide two ways for userspace to read >> from /proc/vmcore. Neither of these check with memblock to see if the page >> they are accessing is nomap. On Seattle this causes: > > Thanks for the patch.It did resolve the kernel crash issue with makedumpfile, > however neither there was any data in vmcore-dmesg nor crash utility was able to > work the saved vmcore. vmcore-dmesg doesn't work for me, but crash did once I'd rebuilt it from the most recent source. The most recent commit I have is: b349598bb755 ("Fix for the ARM64 "bt -R " option if the only reference") Are you using an older version? Thanks, James [0] http://lists.infradead.org/pipermail/linux-arm-kernel/2016-August/447597.html _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec From mboxrd@z Thu Jan 1 00:00:00 1970 From: james.morse@arm.com (James Morse) Date: Fri, 19 Aug 2016 14:34:48 +0100 Subject: [PATCH] fixup! arm64: kdump: add kdump support In-Reply-To: <20160819080020.GA584@localhost.localdomain> References: <57B2E759.201@arm.com> <1471448011-20386-1-git-send-email-james.morse@arm.com> <20160819080020.GA584@localhost.localdomain> Message-ID: <57B70AF8.1000603@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 19/08/16 09:00, Pratyush Anand wrote: > On 17/08/2016:04:33:31 PM, James Morse wrote: >> copy_oldmem_page() and mmap_vmcore() provide two ways for userspace to read >> from /proc/vmcore. Neither of these check with memblock to see if the page >> they are accessing is nomap. On Seattle this causes: > > Thanks for the patch.It did resolve the kernel crash issue with makedumpfile, > however neither there was any data in vmcore-dmesg nor crash utility was able to > work the saved vmcore. vmcore-dmesg doesn't work for me, but crash did once I'd rebuilt it from the most recent source. The most recent commit I have is: b349598bb755 ("Fix for the ARM64 "bt -R " option if the only reference") Are you using an older version? Thanks, James [0] http://lists.infradead.org/pipermail/linux-arm-kernel/2016-August/447597.html