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Maintaining DAMON (https://damonitor.github.io). All opinions are my own.
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LWN@fosstodon.org

LWN.net

[$] How kernel CVE numbers are assigned

It has been four months since Greg Kroah-Hartman and MITRE announced that the Linux kernel project had become its own CVE Numbering Authority (CNA). Since then, the Linux CNA Team [...]

https://lwn.net/Articles/978711/

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Edited 7 months ago
Hackermail v1.1.0[1] is just pushed with a number of features. Now it can be used for reading general patch files or commits with the built-in lore/commits-explorer. Also most hkml features are integrated into the interactive interface. Read the documentation[2] for more details.

[1] https://github.com/sjp38/hackermail/blob/v1.1.0/release_note#L3
[2] https://github.com/sjp38/hackermail/blob/v1.1.0/USAGE.md#interactive-viewer

#hkml #hackermail
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Edited 7 months ago
SK hynix' patch series "DAMON based tiered memory management for CXL memory" has merged[1] into -mm tree! Huge appreciate to great works from the team!

[1] https://lore.kernel.org/all/20240614185328.BA2C1C2BD10@smtp.kernel.org/

#linux #kernel #damon #cxl #tiered-memory
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The DAMON talk for the open source summit in Europe 2024 has been accepted and scheduled: https://sched.co/1ej2S. I am Looking forward to meeting folks in Vienna!

#linux #kernel #damon #ossumit
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@vbabka What speculation!

RE: https://social.kernel.org/objects/95e5a43c-ea88-4491-87f0-35b3c493000c
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LWN@fosstodon.org

LWN.net

Extensible scheduler class to be merged for 6.11

https://lwn.net/Articles/978007/

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Edited 7 months ago
I just pushed Hackermail v1.0.9[1]. The version adds more features for its interactive list/viewer, including complete thread listing, git commit ids handling, and lore links opening.

[1] https://github.com/sjp38/hackermail/blob/v1.0.9/release_note#L3

#hkml #hackermail
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linuxplumbersconf@mastodon.social

Linux Plumbers Conference

Happy June! Cannot believe we almost finished half of 2024! This also means some LPC CFP deadlines are right around the corner. If you want to share something at LPC 2024, don't wait too long! Please checkout our CFP page for more details about various deadlines: https://lpc.events/event/18/abstracts/ .

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Today I learned LSFMM+BPF 2024 videos including that for DAMON session[1] are now available on YouTube as a playlist[2].

[1] https://youtu.be/ywmwXq01ySA?feature=shared
[2] https://www.youtube.com/watch?v=ygNW_Z-fChM&list=PLbzoR-pLrL6oj1rVTXLnV7cOuetvjKn9q

#linux #kernel #damon #lsfmm
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I just pushed Hackermail v1.0.8[1]. From this version, list/thread output supports interactive mails reading and replying.

[1] https://github.com/sjp38/hackermail/blob/v1.0.8/release_note

#hkml #hackermail
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Very pleased to say that I've now finished the first draft of my book, The Linux Memory Manager.

https://linuxmemory.org/

This represents 2 years of evenings and weekends, tons of research, 99.9% from first principles and the kernel source.

There's still plenty of editing to go, but the content is written! 1,351 pages of it (!).

I am not sure on ultimate release date as it depends on how the edit goes, but we're closer now :)

As you can see from the pic, I'm very very tired but also very happy to have finished.

I think I'll chill for a while before I get back to a leisurely edit, read books, watch films, play games, spend time with my wife and cats and do a bunch of stuff the book took out of my life for a long while!

Now I'll go to bed early I think! :)
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linuxplumbersconf@mastodon.social

Linux Plumbers Conference

Registration for LPC 2024 is Now open!

Please checkout our latest blog post for more details:
https://lpc.events/blog/current/index.php/2024/05/27/registration-for-lpc-2024-is-open/

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DAMON user-space tool (damo) v2.3.6[1] is out. This release contains vmas recording[2] and custom-weighted hotness-based access pattern snapshot reporting[3] features.

[1] https://github.com/awslabs/damo/tree/v2.3.6
[2] https://github.com/awslabs/damo/blob/v2.3.6/USAGE.md#recording-memory-mappings
[3] https://github.com/awslabs/damo/blob/v2.3.6/USAGE.md#sorting-regions-based-on-hotness

#linux #kernel #damon #damo
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LWN@fosstodon.org

LWN.net

[$] Better support for locally-attached-memory tiering https://lwn.net/Articles/974126/

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Memory management subsystem pull request[1] for Linux 6.10-rc1 has been posted. This pull request includes DAMOS young page filter, DAMOS auto-tuning functionality kselftest, and misc cleanups/fixups for code, documentation, and tests.

[1] https://lore.kernel.org/20240517192239.9285edd85f8ef893bb508a61@linux-foundation.org

#linux #kernel #mm #damon
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@LWN The article is subscriber-only, but will be available for everyone after two weeks. I highly recommend people to subscribe LWN. If you cannot subscribe LWN right now but want to read the article, however, please DM me. I can send you a subscription-free link.

#linux #kernel #damon

RE: https://fosstodon.org/@LWN/112456810957068482
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LWN@fosstodon.org

LWN.net

[$] An update and future plans for DAMON https://lwn.net/Articles/973702/

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I found "Unusable Free Space Index", which is a good metric to represent the amount of fragmentation, from Mel Gorman's paper[1]. I implemented it as a script called 'ufsi.py'[2], and used it in researches and profiling. While using it, I started wrongly thinking the name of the metric is "ufsi". I have again used the wrong name in LSFMM session of yesterday, and apparently it made one people or two bit confused. Clarifying here, though I unsure how many people will read this. Sorry if I made you bit confused, again.

[1] https://www.landley.net/kdocs/ols/2006/ols2006v1-pages-369-384.pdf
[2] https://github.com/sjp38/lazybox/blob/master/scripts/ufsi.py
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Edited 8 months ago
@LWN launched kernel source database! This is cool! Another reason to subscribe to LWN! https://lwn.net/ksdb/
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Edited 8 months ago
I just sent two sets of patches for DAMON-based tiered memory management [1] and access/contiguity-aware memory scaling[2]. These have been on the back burner for a while, but I was able to get a little more work done this time around because they are the main topics of tomorrow's LSFMM session - presentation-driven development definitely works!

[1] https://lore.kernel.org/20240512175447.75943-1-sj@kernel.org
[2] https://lore.kernel.org/20240512193657.79298-1-sj@kernel.org/

#linux #kernel #damon #lsfmmbpf
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