<html> <head> <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> <div class="moz-cite-prefix">On 10/16/13 09:09, Dave Anderson wrote: </div> <blockquote cite="mid:1767644127.7039912.1381928975487.JavaMail.root@redhat.com" type="cite"> <pre wrap=""> ----- Original Message ----- </pre> <blockquote type="cite"> <pre wrap="">I have some code that allows this. See the following mail thread: <a class="moz-txt-link-freetext" href="http://permalink.gmane.org/gmane.comp.emulators.xen.devel/174807">http://permalink.gmane.org/gmane.comp.emulators.xen.devel/174807</a> The questions are: 1. Does remote access have a specification? </pre> </blockquote> <pre wrap=""> If you're talking about the remote.c file in the crash sources, no, there's nothing other than the remote.c file itself. </pre> </blockquote> Ok, looks like I will need to write something up. <blockquote cite="mid:1767644127.7039912.1381928975487.JavaMail.root@redhat.com" type="cite"> <pre wrap=""> </pre> <blockquote type="cite"> <pre wrap=""> 2. Is it supported? </pre> </blockquote> <pre wrap=""> It's been deprecated for almost 10 years now. I don't understand how you have been able to even get it to build, never mind work as the mail thread indicates?</pre> </blockquote> crash is still building remote.c in 7.0.2-0 and still accepts the command line option: <blockquote><tt>don-760:~/rpmbuild/BUILD/crash-7.0.2>./crash -d99 localhost:5001</tt><tt> </tt><tt> </tt><tt>crash 7.0.2</tt><tt> </tt><tt>Copyright (C) 2002-2013 Red Hat, Inc.</tt><tt> </tt><tt>Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation</tt><tt> </tt><tt>Copyright (C) 1999-2006 Hewlett-Packard Co</tt><tt> </tt><tt>Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited</tt><tt> </tt><tt>Copyright (C) 2006, 2007 VA Linux Systems Japan K.K.</tt><tt> </tt><tt>Copyright (C) 2005, 2011 NEC Corporation</tt><tt> </tt><tt>Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc.</tt><tt> </tt><tt>Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.</tt><tt> </tt><tt>This program is free software, covered by the GNU General Public License,</tt><tt> </tt><tt>and you are welcome to change it and/or distribute copies of it under</tt><tt> </tt><tt>certain conditions. Enter "help copying" to see the conditions.</tt><tt> </tt><tt>This program has absolutely no warranty. Enter "help warranty" for details.</tt><tt> </tt><tt> </tt><tt> </tt><tt>server: [localhost]</tt><tt> </tt><tt> port: [5001]</tt><tt> </tt><tt> file1: [(null)]</tt><tt> </tt><tt> file2: [(null)]</tt><tt> </tt><tt>127.0.0.1</tt><tt> </tt><tt>don-760.cloudswitch.com: Unknown host</tt><tt> </tt><tt> </tt><tt>crash: connect [don-760.cloudswitch.com:5001] failed</tt><tt> </tt><tt> </tt><tt>don-760:~/rpmbuild/BUILD/crash-7.0.2></tt> </blockquote> <blockquote cite="mid:1767644127.7039912.1381928975487.JavaMail.root@redhat.com" type="cite"> <pre wrap=""> But I don't know anything about xen_crash, xentrace, or how it even interacts with the crash utility? It looks like it might replace the old "crashd" daemon that was built as part of the old remote access facility? </pre> </blockquote> Yes, that is the case. My guess is that using crashd was more pain the help. However the big plus in the case is that the guest (domU) is paused while crash is running and so can be seen more like a dump and not a active system. I have found that crash has some issues between active, remote, and dump modes; but most of them are speed related or start-up like guessing the kernel version. <blockquote cite="mid:1767644127.7039912.1381928975487.JavaMail.root@redhat.com" type="cite"> <blockquote type="cite"> <pre wrap=""> 3. Should the code be part of xen or crash? </pre> </blockquote> <pre wrap=""> I don't know. Xen support is no longer something I'm actively involved with since Red Hat dropped support for it. Since then, Xen support in the crash utility has primarily come from Daniel Kiper from Oracle and Petr Tesarik from SUSE. They are both on the list, and should see this message, but I'll cc them in this response as well. Thanks, Dave </pre> </blockquote> I think <a class="moz-txt-link-abbreviated" href="mailto:david.vrabel@citrix.com">david.vrabel@citrix.com</a> is also involved now (adding to CC list). -Don Slutz <blockquote cite="mid:1767644127.7039912.1381928975487.JavaMail.root@redhat.com" type="cite"> <pre wrap=""> -- Crash-utility mailing list <a class="moz-txt-link-abbreviated" href="mailto:Crash-utility@redhat.com">Crash-utility@redhat.com</a> <a class="moz-txt-link-freetext" href="https://www.redhat.com/mailman/listinfo/crash-utility">https://www.redhat.com/mailman/listinfo/crash-utility</a> </pre> </blockquote> </body> </html>