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Maintaining DAMON (https://damonitor.github.io). All opinions are my own.
sj

sj

Edited yesterday
I was the 9-th most active Linux kernel v7.3 developer [1] in terms of the number of commits. This is my first time to be in the top ten!

I was also the 30-th most active Linux kerne v7.3l code reviewer [2] in terms of the number of Reviewed-by: tags. This must be my first time to be in the list!

Numbers are just numbers, don’t get me wrong. Those just help my memory of the moments, though.

[1] https://lwn.net/Articles/1100241/
[2] https://lwn.net/ksdb/releases/v7.3/by_tags

#linux #kernel
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kernellogger@hachyderm.io

Thorsten Leemhuis (acct. 1/4)

Recordings from this years Plumbers Conference are now available.

Once way to access them is a playlist on YouTube: https://www.youtube.com/playlist?list=PLd3Gjl51NPg0

You can also find them via "video" links in each contribution in the schedule – where you can find linkgs to the slides, too: https://lpc.events/event/20/timetable/?view=lpc

See also the announcement from @linuxplumbersconf at: https://lpc.events/blog/current/index.php/2026/10/19/lpc-2026-video-recordings-are-available/

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sj

Edited 3 days ago
No delay on ETA (yet)!

Beyond page table accessed-bit DAMON extension milestone 2 started about 1.5 months ago. I made no much progress so far. I was busy for other works and conferences. That said, I did invest some time on this. I just wrote and shared a very humble initial high level design. ETA is same to the initial plan: LSFMMBPF'27. No delay on ETA (yet)!

[1] https://lore.kernel.org/20261017195747.89961-1-sj@kernel.org

#linux #kernel #damon
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sj

sj

I started running my humble DAMON CI test for stable kernels and reporting [1] the results again.

One of my takeaways from the last three weeks of travel is that stable kernels need more attention. Particularly I'm not spending enough attention for DAMON in stable kernels.

I used to run the humble DAMON CI test for stable kernels and report results. Since I lost the test machines, however, I stopped doing that. After returning from the trip, I spent time to setup the CI again on my mini desktop [2] and seems it works.

[1] https://lore.kernel.org/20261013141408.139524-1-sj@kernel.org
[2] https://sjp38.github.io/posts/mini_desktop_as_local_kernel_hacking_machine/

#linux #kernel #damon #stable
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sj

sj

Next Tuesday, there will be the first DAMON (nano) Conference [1] at LPC. Seven authors will present five lightning talks. Topics include DAMON extensions, and usages for tiered memory dynamic interleave, hugepage and AI cloud workload. Looking forward to meeting you!

[1] https://lpc.events/event/20/contributions/2453/

#linux #kernel #damon #linuxplumbers
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gregkh

Greg K-H

My secret kernel review tools were spotted in the back of the @KernelRecipes room
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KernelRecipes@fosstodon.org

Kernel Recipes

Massive thanks to @corbet for being this year's godfather, you set the bar dangerously high!

And the torch now passes to @dwmw2 for 2027! No pressure. 🔥

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sj

Impressive paper. DeepSeek is saving [1] 21.2% of memory using DAMON on their production sandbox platform, DSec.

[1] https://arxiv.org/pdf/2609.22978

#linux #kernel #damon
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sj

sj

@KernelRecipes The slides are available at https://github.com/damonitor/talks/blob/master/2026/kernel_recipes/damon_kernel_recipes.pdf

#kr2026 #linux #kernel #damon

RE: https://fosstodon.org/@KernelRecipes/117308443657878912
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KernelRecipes@fosstodon.org

Kernel Recipes

@sj now moves on to another area, memory management: how to handle more data with less memory with DAMOS.

https://docs.kernel.org/mm/damon/design.html

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monsieuricon

K. Ryabitsev-Prime 🍁

We now publish tar'd up shallow git clones you can use with your CI. Please carefully read the safety caveats and use the script we provide to make sure you're not getting something malicious:

https://people.kernel.org/monsieuricon/using-shallow-git-tarballs-for-ci
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sj

sj

Edited 1 month ago
The season for conferences is back. I will travel for three weeks, starting from tomorrow. During the trip, I will give four talks in three conferences.

Next week, I will be in Paris for Kernel Recipes. I will have a talk [1] introducing DAMOS. After the conference, I will head to Prague for LPC and OSSummit Europe.

After enjoying Prague for a week, I will have two talks in LPC. One [2] for updates of DAMON work for memory tiering and general NUMA management at Special Purpose Memory Management Micro-Conference, Monday. And another one [3] for the beyond-page table accessed bit DAMON extension community collaboration project at DAMON (Nano) Conference, Tuesday.

Finally, I will share [4] how DAMON could be effectively used in Open Source Summit Europe, Wednesday.

Looking forward to meeting people in Paris and Prague. If you find me, please feel free to come and shake my hand in person!

[1] https://kernel-recipes.org/en/2026/schedule/damos-the-smart-cruise-control-for-ram/
[2] https://lpc.events/event/20/contributions/2518/
[3] https://lpc.events/event/20/contributions/2453/
[4] https://sched.co/2RaXh

#damon #kernel_recipes #lpc #spmm_microncof #damon_conf #osseu
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sj

Edited 1 month ago
Today I found Sashiko [1] now has a "login" button.

[1] https://sashiko.dev
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sj

sj

Edited 1 month ago
Five years ago today, DAMON was merged [1] into the mainline. It was grateful years. I learned things much more than I expected in the five years. Hopefully DAMON gave some fun and wins to people. I'm looking forward to the next five years.

[1] https://git.kernel.org/torvalds/c/2224d8485492

#linux #kernel #damon
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sj

sj

Deliveries are on the track. We start the milestone 2 of DAMON extension beyond the page table accessed bit for AMD IBS-like h/w features and per-CPUs-like detailed monitoring. Milestone 1 is considered to be delivered on time. Milestone 2 will take time, but seems still doable by the planned timeline.

[1] https://lore.kernel.org/20260905171537.84217-1-sj@kernel.org

#linux #kernel #damon
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sj

sj

Edited 1 month ago
Linux 7.3-rc1 is released. Hence DAMON newsletter [1] for the cycle is also published.

TL; DR:

Just after breaking the record of DAMON history in the last cycle, this cycle
again broke the record. It was the busiest cycle of DAMON history. 20 authors
made 161 commits and 2283 lines of changes for DAMON on the Linux mainline. A
new data attributes monitoring feature, a few optimizations for DAMON users,
and quite a lot of refactoring are delivered. New DAMON usages and development
projects are shared. The first DAMON (nano) Conference is scheduled.

[1] https://lore.kernel.org/20260830235014.64406-1-sj@kernel.org/

#linux #kernel #damon
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sj

Jason Angelov developed an interesting project, "Cold Pages DAMON Pager". It utilizes DAMON to find cold pages and than compress those.

[1] https://github.com/jasonangelov/damon-compression-pager
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kernellogger@hachyderm.io

Thorsten Leemhuis (acct. 1/4)

Edited 1 month ago

The video recording of @gregkh's recent keynote "Linux in the Land of LLMs" is now available on YouTube: https://www.youtube.com/watch?v=_MwMLPmMccs&pp=0gcJCRMMAYcqIYzv

Slides: https://hosted-files.sched.co/osskorea2026/a7/4%20-%20Greg%20-%20oss_korea%20v2.pptx.pdf

Here are a few screenshots from the latter:

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gregkh

Greg K-H

Some talks just write themselves, @KernelRecipes is going to be fun this year!

(not that it's not fun every year, but you get the idea...)
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sj

The complete schedule of the first DAMON (nano) Conference is now available [1] at the web page. Looking forward to meet you all in Prague!

[1] https://lpc.events/event/20/contributions/2453/

#linux #kernel #damon #linuxplumbers

RE: https://social.kernel.org/objects/bcd257a9-c3c5-4e75-bda7-a06d6681aefd
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