Archive for March, 2020
my experience with kernel lockdown and eBFP
I’m running Ubuntu Linux on Dell Latitude 7390 and was extremely baffled when suddenly I couldn’t run any of eBPF tools. Even running as root I received this: Error creating map: ‘@curfreq’: Operation not permitted Error creating map: ‘@process_mhz’: Operation not permitted Error creating map: ‘@system_mhz’: Operation not permitted Error creating printf map: Operation not […]
Christmas gifts 2020 already in house
It all started with a long awaited book by Brendan Gregg “BPF Performance Tools” that I decided to purchase directly from www.informit.com since amazon.de didn’t have it in store and it wasn’t clear at all when they would have one. Then another day I found this in my mail box: With a couple of cute […]