Inspired by Thorsten's great rc8 statistic[1], I extended my script[2] to further expect future releases based on the past release cadence.

[1] https://social.kernel.org/notice/AfkOGGMJWyDFsvYXdA
[2] https://github.com/sjp38/lazybox/blob/master/git_helpers/relstat.py

#linux #kernel #release_stat

Memory management subsystem pull request[1] for Linux 6.9-rc1 has been posted. To quote Andrew’s summary for DAMON part:

• More DAMON work from SeongJae Park in the series
  • “mm/damon: make DAMON debugfs interface deprecation unignorable”
  • “selftests/damon: add more tests for core functionalities and corner cases”
  • “Docs/mm/damon: misc readability improvements”
  • “mm/damon: let DAMOS feeds and tame/auto-tune itself”

[1] https://lore.kernel.org/all/20240313200532.34e4cff216acd3db8def4637@linux-foundation.org/

#linux #kernel #damon

The 6.8 kernel has been released https://lwn.net/Articles/964784/ #LWN

@ljs @kernellogger @larsmb @gregkh @pavel It's really complicated... I'm myself on the distro side here (though speaking only for myself) and I see very clearly the additional work that this is causing. On the other hand... I do think this is actually moving things in the right direction, security-wise. The uncomfortable truth is that the kernel has a TON of bugs, many with security impact. This move really just puts it completely out in the open and forces everybody to acknowledge that fact.

Just got an invitation to LSF/MM/BPF 2024[1]. Looking forward to meeting with other kernel hackers and discuss about topics for DAMON[2] and memory management!

[1] https://events.linuxfoundation.org/lsfmmbpf/
[2] https://lore.kernel.org/damon/20240129204749.68549-1-sj@kernel.org/

#linux #kernel #damon #lsfmm #lsfmmbpf

Just released damo (DAMON user-space tool) v2.2.4[1]. This version enables access pattern-based profiling[2]. For example, you can know which code is making your program's memory usage unexpectedly high, or which code is intensively accessing memory. Hopefully that will help better understanding and optimizing your code.

[1] https://github.com/awslabs/damo/tree/v2.2.4
[2] https://github.com/awslabs/damo/blob/v2.2.4/USAGE.md#profile

#linux #kernel #damon #damo #profiling

@kernellogger @kees @gregkh I also considered using the repo, especially the nice json files under cve/published/. However, the README[1] under cve/ made me hesitate. Quoting the part that made me unsure if it can be used.

For now, ignore this as we are getting things working properly…

[1] https://git.kernel.org/pub/scm/linux/security/vulns.git/tree/cve/README

Yet another academic paper[1] exploring DAMON for tiered memory management will be presented at EuroSys 2024[2].

[1] https://pasalabs.org/papers/2024/Eurosys24_M3_Camera_Ready.pdf
[2] https://2024.eurosys.org/

#linux #kernel #damon #eurosys

The #Linux #kernel CVE team released their first two CVEs:

* CVE-2023-52433: netfilter: nft_set_rbtree: skip sync GC for new elements in this transaction
https://lore.kernel.org/linux-cve-announce/2024022058-outsell-equator-e1c5@gregkh/

* CVE-2024-26581: netfilter: nft_set_rbtree: skip end interval element from gc
https://lore.kernel.org/linux-cve-announce/2024022024-uniquely-recluse-d893@gregkh/

For more details on the new #LinuxKernel CVE process, see https://docs.kernel.org/process/cve.html (recently added by https://git.kernel.org/torvalds/c/5928d411557ec5d53832cdd39fc443704a3e5b77 )

Screenshot from https://lore.kernel.org/linux-cve-announce/

DAMO v2.2.2 is released. The important change in this release is the introduction of 'replay' command[1]. It receives 'damo record' output and replay the recorded access pattern. Hopefully it will help reproducing the real-world's memory access pattern for analysis and benchmarks. The command is in an experimental level and not formally documented at the moment, though.

[1] https://github.com/awslabs/damo/blob/v2.2.2/release_note#L5

#linux #kernel #damon #damo

@mpdesouza Couldn't be more happy than hearing this :) I will look into the PR soon!

@mpdesouza So glad to hear that. Please feel free to ask any questions or help :)

@heikkiket Hope it helps you if possible. Please feel free to ask questions or helps :)

I just marked my linux kernel mails management tool as v1 (https://sjp38.github.io/post/hackermail_v1/). I hope it answers the questions on my mails management workflow, better than I did in the past.

#linux #kernel #hackermail

@alexmurray @gregkh Maybe this document explains some of the reasons? https://docs.kernel.org/process/security-bugs.html#disclosure-and-embargoed-information

DAMON talk for OSSummit NA 2024 has been accepted and scheduled[1]. The talk will present DAMOS auto-tuning and hopefully, more new DAMO features. The features are still under development, but hopefully, the power of presentation-driven development will make it. ;) Looking forward to meeting you there!

[1] https://sched.co/1aBOg

#ossummit #ossummitna #linux #kernel #damon #damo

[$] A turning point for CVE numbers https://lwn.net/Articles/961978/ #LWN

@amit @paulmckrcu Pretty much. I was able to start RCX[1] research project all owing to the experience from the translation of the book and some trivial contributions for Paul's artifacts. And RCU is only a small part of the things that I learned from Paul. :)

[1] https://dl.acm.org/doi/10.1145/3342195.3387527

Linux is now a CNA: http://www.kroah.com/log/blog/2024/02/13/linux-is-a-cna/

This has taken a long time, I'd like to thank all the groups that helped, and especially the CVE group themselves. Our application was a bit different than other groups, but they understood that this is important for security overall.

The kernel becomes its own CNA https://lwn.net/Articles/961961/ #LWN