Hey Rik (reply to list) I forgot to thank you for this response. I had planned to buy a serial cable if I had any more instability after upgrading. After doing the full-blown yum update for my stock FC5_x86_64 boxes (to kernel 2.6.17-1.2157_FC5xen0 and Xen-3.0.2-3), I have had no such crashes after 13 days. I really wish I had the stack traces so you could at least identify a fixed bug, but I don't have the luxury of being able to go back to an old code release and reproduce the problem, at least not now. If anyone on this list experiences instability when stressing mysql on a x86_64 VM, especially with a stack that has mask_IO_APIC_irq or mask_and_ack_level_ioapic_irq in it (not sure exactly what these do), I would suggest doing an upgrade to the latest Xen on Dom0; I did not upgrade the guest OSes, they are still on the stock FC5 guest kernel (2.6.15-1.2054_FC5xenU) -Alex --------------------------------------------- Alex Tomic Database Administrator, Gifts.com 8833 Sunset Blvd, 3rd Floor West Hollywood, CA 90069 Phone: (310) 360-4332 -----Original Message----- From: Rik van Riel [mailto:riel@xxxxxxxxxx] Sent: Tuesday, August 08, 2006 4:20 PM To: Alex Tomic Cc: fedora-xen@xxxxxxxxxx Subject: Re: Newbie question regarding Xen traps Alex Tomic wrote: > My question is, how do I retain the trap output that is printed to the > console when the machine dies? Serial console. The easiest thing is to buy two serial cables and have both systems act as serial console server for the other, using the excellent ttywatch program from Fedora Extras. If one crashes, the other will log all the crash output. Don't forget to also configure the hypervisor for serial console output. Your grub.conf will look like this: title Fedora Core (2.6.17-1.2488.fc6xen) root (hd0,0) kernel /xen.gz-2.6.17-1.2488.fc6 com1=38400,8n1 module /vmlinuz-2.6.17-1.2488.fc6xen ro root=LABEL=/ console=ttyS0,38400 mem=2000M panic=180 debug 3 module /initrd-2.6.17-1.2488.fc6xen.img When you get a backtrace, please file a bugzilla and feel free to add me to the CC: list. I have a very strong personal interest in fixing x86-64 Xen bugs, since I want to get rid of a (noisy, warm) server at home and move that workload into a virtual machine on my new desktop system :) -- "Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." - Brian W. Kernighan -- Fedora-xen mailing list Fedora-xen@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-xen
