Category Archives: Xen

kexec’ing into a Xen kernel

Posted on August 8, 2008 by ward

I’ve got a number of servers that run coreboot + Xen. I like to run coreboot with a linux-as-a-bootloader (LAB) payload. That means that coreboot, after bringing up the machine, boots into a small linux kernel + busybox environment, entirely … Continue reading →

Posted in coreboot, Xen | Leave a comment

of how XFS saved the day

Posted on March 15, 2008 by ward

Io, one of my mailservers, is a Xen instance. It’s moderately busy – a normal day sees about 12000 accepted messages and about 24000 rejected delivery attempts (spam). It’s an Exim/clamav/dspam setup, and a significant proportion of the 12000 accepted … Continue reading →

Posted in Sysadmin, Xen | Leave a comment

xen 3.2 serial

Posted on February 18, 2008 by ward

Getting access to the serial port in a Xen 3.2 dom0 is somewhat complicated. This is the magic incantation for your grub menu.lst file to get console at 115200 bps on the first physical serial port, as well as on … Continue reading →

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Xen 3.2.0

Posted on January 26, 2008 by ward

So Xen 3.2.0 was released last week. Oddly enough there are no precompiled 64-bit binaries anymore. That does not make much sense to me – running Xen on 32 bit is just… painful. Problems with accessing ram beyond 4GB, issues … Continue reading →

Posted in Free Software/Open Source, Xen | 1 Comment

a new record

Posted on April 19, 2007 by ward

This morning, a user on one of our machines (inadvertently) created a mail loop with a bad procmail script: 09:42:05 up 120 days, 9:23, 20 users, load average: 3367.40, 3265.08, 2751.75 I had seen machines go up to about 200 … Continue reading →

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