On modern CPUs, rust seems to perform very nicely with the thread context switches, at least when benchmarking an echo server. For that I also wrote an echo server benchmark client. ...more

People who want to secure their Fedora/RHEL system have to:

• add a BIOS password
• add a grub password
• add “rd.shell=0” to the kernel command line

Anaconda does add “rd.shell=0” to the kernel command line automatically, if you setup the bootloader with a password. ...more

This blog post shows how to tweak Fedora, if you want to use a smartcard with OpenPGP and use it also as a ssh key. It also serves me as a recipe for fresh installations. ...more

This is a repost of a blog post of 2008. Just for the reference :-)

This class allows sub-classes to commit changes to an instance to a history, and rollback to previous states. ...more

When compiling systemd on rawhide, we noticed a significant slowdown in compile time. Investigating further, it turns out, that libtool forks an incredible amount of sed. Running perf showed 30% of the “make all” was spent in bash. strace showed an execve of sed with the same arguments 180,000 times!!!!! ...more