The VMDUMP is generated by z/VM CP and is in a z/VM specific format, but if you 'vmur receive --convert ...' it the --convert flag makes it compatible with the crash tool which RedHat and any other linux kernel developer will use to check it out. You will also need to provide the exact kernel version you are running so that the appropriate vmlinux symbol set can be used with the dump to figure out what is what.
On Tue, Oct 6, 2015 at 10:10 PM, Thomas Anderson <tp...@speakeasy.net> wrote: > > https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/pdf/Kernel_Crash_Dump_Guide/Red_Hat_Enterprise_Linux-7-Kernel_Crash_Dump_Guide-en-US.pdf > > Is a really nice write up on how to get your guest image configured to > dump in a manner that will be useful to Red Hat support (and actually has > some mention of Z systems too! ;) ). > Without doing this prep work, even if you had been able to send your gust > a SysReq or NMI to force the panic, it wouldn’t have collected the > diagnostics for you to give to the vendor. > > > Tom Anderson > Ex ignorantia ad sapientiam > e tenebris ad lucem! > > > On Oct 6, 2015, at 10:17 AM, Vitale, Joseph <joseph.vit...@bnymellon.com> > wrote: > > > > Thanks for that information. Question, is that dump usable by Red Hat > or only IBM Linux support as my support contract is via Red Hat. > > > > Thanks > > Joe > > > > Joseph Vitale > > Technology Services Group > > Mainframe Operating Systems > > > > Pershing Plaza > > 95 Christopher Columbus Drive > > Floor 14 > > Jersey City, N.J. 07302 > > Work 201-395-1509 > > Cell 917-903-0102 > > > > > > -----Original Message----- > > From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of > Robert J Brenneman > > Sent: Tuesday, October 06, 2015 1:02 PM > > To: LINUX-390@VM.MARIST.EDU > > Subject: Re: How to force crash dump from hung Red Hat guest > > > > from the guest's console issue #CP VMDUMP to trigger a CP managed dump > of the virtual machine. This dumps to spool space and it shows up in the > guest's rdr device. You can then 'vmur receive --convert <spoolid> > /path/to/where/dump/goes' to import the vmcore to the Linux file system > when you IPL after the dump completes. > > > > Make sure you have enough spool space to contain however much virtual > memory the guest is defined with. Also make sure you have time - a VMDUMP > of a 16 GB virtual machine can take on the order of 30 minutes - dumping to > spool is slow but it will save your bacon when the kdump function does not > work for whatever reason. > > > > > http://www-01.ibm.com/support/knowledgecenter/linuxonibm/com.ibm.linux.z.lgdt/lgdt_c_intro.html > > > > On Tue, Oct 6, 2015 at 11:41 AM, Vitale, Joseph < > joseph.vit...@bnymellon.com > >> wrote: > > > >> Hello, > >> > >> Running Red Hat 6.6 under zVM 6.3. I had a guest hang and unable to > >> issue linux commands to force a kernel crash dump( echo c > > >> /proc/sysrq-trigger ). > >> > >> Any suggestions how that can be accomplished? > >> > >> Thanks > >> Joe > >> > >> > >> Joseph Vitale > >> Technology Services Group > >> Mainframe Operating Systems > >> > >> Pershing Plaza > >> 95 Christopher Columbus Drive > >> Floor 14 > >> Jersey City, N.J. 07302 > >> Work 201-395-1509 > >> Cell 917-903-0102 > >> > >> > >> The information contained in this e-mail, and any attachment, is > >> confidential and is intended solely for the use of the intended > recipient. > >> Access, copying or re-use of the e-mail or any attachment, or any > >> information contained therein, by any other person is not authorized. > >> If you are not the intended recipient please return the e-mail to the > >> sender and delete it from your computer. Although we attempt to sweep > >> e-mail and attachments for viruses, we do not guarantee that either > >> are virus-free and accept no liability for any damage sustained as a > result of viruses. > >> > >> Please refer to http://disclaimer.bnymellon.com/eu.htm for certain > >> disclosures relating to European legal entities. > >> > >> ---------------------------------------------------------------------- > >> For LINUX-390 subscribe / signoff / archive access instructions, send > >> email to lists...@vm.marist.edu with the message: INFO LINUX-390 or > >> visit > >> http://www.marist.edu/htbin/wlvindex?LINUX-390 > >> ---------------------------------------------------------------------- > >> For more information on Linux on System z, visit > >> http://wiki.linuxvm.org/ > >> > > > > > > > > -- > > Jay Brenneman > > > > ---------------------------------------------------------------------- > > For LINUX-390 subscribe / signoff / archive access instructions, send > email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit > > http://www.marist.edu/htbin/wlvindex?LINUX-390 > > ---------------------------------------------------------------------- > > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > > > > The information contained in this e-mail, and any attachment, is > confidential and is intended solely for the use of the intended recipient. > Access, copying or re-use of the e-mail or any attachment, or any > information contained therein, by any other person is not authorized. If > you are not the intended recipient please return the e-mail to the sender > and delete it from your computer. Although we attempt to sweep e-mail and > attachments for viruses, we do not guarantee that either are virus-free and > accept no liability for any damage sustained as a result of viruses. > > > > Please refer to http://disclaimer.bnymellon.com/eu.htm for certain > disclosures relating to European legal entities. > > > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > -- Jay Brenneman ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
