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LWN.net

[$] Tracking when BPF programs may sleep

BPF programs can run in both sleepable and non-sleepable (atomic) contexts. Currently, sleepable BPF programs are not allowed to enter an atomic context. Puranjay Mohan has a new patch set that changes that. The patch set would let BPF programs called in sleepable contexts temporarily acquire locks that cause the programs to transition to an atomic context. BPF maintainer Alexei Starovoitov objected to parts of the implementation, however, so acceptance of the patch depends on whether Mohan is willing and able to straighten it out.

Phoronix

Cloudflare Details Their Upgrade To EPYC Turin For 2x Throughput, 50% Better Perf/Watt

Cloudflare's technical blog posts about their hardware and software efforts are always a treat to read. Their latest fascinating technical content is on their newest "Gen 13" server platform based around AMD EPYC Turin where they are now achieving 2x throughput and 50% better performance-per-Watt thanks to these latest-generation AMD EPYC server processors paired with software improvements too...

LWN.net

Kernel prepatch 7.0-rc5

Linus has released 7.0-rc5 for testing. "It looks like things are starting to calm down - rc5 is smaller than the previous rc's this merge window, although it still tracks a bit larger than rc5s historically do."

LWN.net

Security updates for Monday

Security updates have been issued by AlmaLinux (gimp:2.8, grub2, kernel, libarchive, libvpx, nginx, opencryptoki, python3.12, vim, yggdrasil, and yggdrasil-worker-package-manager), Debian (chromium, freeciv, libvirt, libyaml-syck-perl, mapserver, ruby-rack, spip, and webkit2gtk), Fedora (chromium, cpp-httplib, glib2, libsoup3, localsearch, openssh, python-scitokens, python-ujson, python3.6, scitokens-cpp, uxplay, wordpress, and xen), Mageia (expat), Red Hat (osbuild-composer), SUSE (Announcement ID: SUSE-SU-2026:0940-1 Release Date: 2026-03-20T13:41:23Z Rating: important References:, Announcement ID: SUSE-SU-2026:0941-1 Release Date: 2026-03-20T13:41:30Z Rating: important References:, Announcement ID: SUSE-SU-2026:0943-1 Release Date: 2026-03-20T13:41:33Z Rating: important References:, Announcement ID: SUSE-SU-2026:0944-1 Release Date: 2026-03-20T13:41:37Z Rating: important References:, Announcement ID: SUSE-SU-2026:0945-1 Release Date: 2026-03-20T13:41:40Z Rating: important References

Phoronix

Intel FRED Can Yield Great Performance - FRED Benchmarks On Panther Lake

With Intel's new Core Ultra Series 3 "Panther Lake" laptop SoCs, the Xe3-based Arc B390 graphics and much improved CPU performance capture much of the spotlight. One new capability with Panther Lake that isn't featured as much though is the new FRED capability with Flexible Return and Event Delivery. Today's Intel Panther Lake testing is looking at the very interesting performance impact of FRED on Linux.