-----Original Message----- From: Bhupesh Sharma [mailto:bhsharma@xxxxxxxxxx] Sent: 29 November 2017 15:16 To: Gurumurthy, Anil <Anil.Gurumurthy at cavium.com> Cc: Dave Young <dyoung at redhat.com>; kexec at lists.infradead.org Subject: Re: kdump issues with 4.11 kernel Hi Anil, On Wed, Nov 29, 2017 at 2:44 PM, Gurumurthy, Anil <Anil.Gurumurthy at cavium.com> wrote: > Thanks. That did help getting kexec to work. > However I still do not get a crash dump - echo c > > /proc/sysrq-trigger does not get a crash dump. > > Any thoughts? Cam you share the console messages you see when the crash kernel boots? Or do you see nothing after the crash is introduced via echo c > /proc/sysrq-trigger [Anil] I do not see any messages after introducing the crash. Generally, depending on your test machine arch, it is useful to use earlycon/earlyprintk to see if the crash kernel produced any useful message until the actual console device became operational. Can you try setting the earlycon/earlyprintk settings and share the crash kernel logs messages after the same? Thanks, Bhupesh > -----Original Message----- > From: Dave Young [mailto:dyoung at redhat.com] > Sent: 29 November 2017 13:09 > To: Gurumurthy, Anil <Anil.Gurumurthy at cavium.com> > Cc: kexec at lists.infradead.org > Subject: Re: kdump issues with 4.11 kernel > > Hi, > On 11/29/17 at 05:29am, Gurumurthy, Anil wrote: >> Hello, >> I was facing trouble getting a crash dump on 4.11 kernel. Debugging a bit, I see that the kexec run from the cmd line fails. Any ideas on what I could be missing? >> >> [root at localhost ~]# kexec -p /boot/vmlinuz-`uname -r` >> --initrd=/boot/initramfs-`uname -r`kdump.img ELF core (kcore) parse >> failed Cannot load /boot/vmlinuz-4.11.12+ >> > > Can you try below kexec-tools commit: > commit ed15ba1b9977e506637ff1697821d97127b2c919 > Author: Pratyush Anand <panand at redhat.com> > Date: Wed Mar 1 11:19:42 2017 +0530 > > build_mem_phdrs(): check if p_paddr is invalid > > Thanks > Dave > > _______________________________________________ > kexec mailing list > kexec at lists.infradead.org > http://lists.infradead.org/mailman/listinfo/kexec
