Libbpf 1.0 is officially here! See the "Journey to libbpf 1.0" blog post for details on what went into making libbpf 1.0, what are the breaking changes, and what exciting new functionality was added! nakryiko.com/posts/libbpf-v…

Drgn is pretty sweet. Thx Omar Sandoval (@[email protected])

I wasn't able to make it to Plumbers this year, but drgn contributor Stephen Brennan will be doing a joint session with the GNU poke developers about programmable debugging: lpc.events/event/16/contr…. 12 PM in the Toolchains Track. Check it out if you're attending!

Just wrote a 40 line comment explaining the mess that is ELF notes. NT_GNU_PROPERTY_TYPE_0 ruined everything.

Has ILP32 ever taken off? From what I can tell, x32 is basically dead, but I remember there was something similar in the works for ARM64.

David Vernet is a core systems engineer on the Kernel team at Meta working on the BPF and #Linux kernel scheduler. Learn what his typical day looks like and what he enjoys most about his job at Meta: bit.ly/3SqRqsQ

Signals make up the plumbing in Unix-like operating environments, but they come with a significant number of pitfalls as a project grows. Learn about some of the alternative methods and mitigations to use from Chris Down: bit.ly/3LMNIrk

Software Engineer Martin Lau’s responsibilities range from reviewing patches in the mailing list to lowering service start-up time (down to six seconds). Learn how Martin’s contributions to the #Linux Kernel Team are helping production scale at Meta: bit.ly/3SP7nK4

Quite a few nice performance improvements in the main #btrfs merge for #Linux #kernel 6.1: git.kernel.org/torvalds/c/76e… "[…] support io_uring and buffered writes […] leads to speed improvement in IOPS (2x), throughput (2.2x), latency (depends, 2x to 150x) […]"

New blog post introducing and demoing retsnoop, a powerful and ergonomic tool for debugging confusing kernel errors and learning kernel internals through tracing. nakryiko.com/posts/retsnoop… #linux #tracing

Huge thanks to @michel_slm for packaging drgn for Debian!

I'm on Mastodon now as @[email protected]! Feel free to follow me there, too.

Announcing drgn/contrib/, an easy place to share drgn scripts! If you have a useful script but you don't have time to turn it into a proper helper/tool, open a pull request there. See github.com/osandov/drgn/t…

Who's still using Python 3.6? I really want to drop 3.6 support for drgn (github.com/actions/setup-… is the latest reason), but I suspect that wouldn't be nice for those using enterprise Linux distros

The main focus of my time for the last 8-9 months was sent to vger this morning: lore.kernel.org/all/2022113008… I'm super excited about the possibility of implementing scheduling policies with BPF. Very grateful to Tejun for leading the effort and allowing me to tag along for the ride.

drgn 0.0.22 is out now! Stephen Brennan contributed my favorite new feature: a method for listing all of the local variables in a stack frame. There are also new helpers for slab and XArrays, plus partial s390x support. See drgn.readthedocs.io/en/latest/rele… for the rest of the highlights.

The Linux Kernel Debugging Tools monthly meeting is this Wednesday, January 25th at 11:30 AM Pacific time. See the linux-debuggers mailing list for the agenda: lore.kernel.org/linux-debugger… and let me know if you'd like an invite.