Posts
180
Following
30
Followers
81
Maintaining DAMON (https://damonitor.github.io). All opinions are my own.
sj
repeated
phoronix@masto.ai

Phoronix

Sched_ext Merged For Linux 6.12 - Scheduling Policies As BPF Programs

Linux 6.12 is shaping up to be a heck of a kernel update! Following real-time "PREEMPT_RT" going mainline after twenty years and many other kernel features merged this week, Linus Torvalds just pulled in the much anticipated sched_ext code!..
https://www.phoronix.com/news/Linux-6.12-Lands-sched-ext

0
2
1
sj

sj

Edited 4 months ago
My Kernel Memory Management LPC Micro Conference talk titled "DAMON: Long-term Plans for Kernel That {Just Works,Extensible}" was successful.
The video[1] and slides[2] are available. I was obviously nervous since I forgot contents of the slides due to the great talks from two previous speakers (I highly recommend you to watch those). I like it though, since it reminds me how humble I am ;)

[1] https://www.youtube.com/live/CTWQ-d7pj5s?feature=shared&t=20182
[2] https://lpc.events/event/18/contributions/1768/

#linux #kernel #damon #linuxplumbers
0
5
3
sj

sj

MM pull request for Linux v6.12-rc1 is posted[1] by Andrew Morton. Important fixes / cleanups for DAMON are included:

- mm/damon/lru_sort: adjust local variable to dynamic allocation
- misc fixups for DAMON {self,kunit} tests
- replace per-quota region priorities histogram buffer with per-context one
- Docs/damon: update GitHub repo URLs and maintainer-profile

I believe it is a good list of changes for next LTS kernel candidate.

[1] https://lore.kernel.org/20240920023317.f20c9ecbb2a2f4bf382d831c@linux-foundation.org

#linux #kernel #mm #damon
0
1
1
sj
repeated
monsieuricon

K. Ryabitsev

Lots of people thanked me for my work on b4 this week. It feels very nice, but I want to remind everyone that b4 wouldn't be possible without public-inbox. Please email Eric Wong (privately) and thank him for his work -- I am pretty sure he can use some good vibes.
0
6
19
sj

sj

Found an interesting academic paper preprint that optimizing THP using DAMON and BPF: "eBPF-mm: Userspace-guided memory management in
Linux with eBPF" (https://arxiv.org/pdf/2409.11220)

#linux #kernel #damon #bpf #thp
0
1
1
sj

sj

Edited 4 months ago
CONFIG_DAMON is enabled on Debian kernel! https://salsa.debian.org/kernel-team/linux/-/merge_requests/1172

#linux #kernel #damon
0
2
6
sj
repeated
uis@pone.social

uis

Reply to @gregkh

@gregkh
> but it's not obvious how and no one has come up with a way to do so. Maybe now they will have some more incentive :)

Not sure if this is what you want, but there is __attribute__((tainted_args)) since gcc 12.

1
1
2
sj
repeated
gregkh

Greg K-H

This "untrusted data" patch series from Benno Lossin is the result of conversations at last weekend's Rust Linux kernel conference in Copenhagen:

https://lore.kernel.org/all/20240913112643.542914-1-benno.lossin@proton.me/

It's not a "silver bullet" for why we should be using rust in the Linux kernel, but it is a "big giant sledgehammer" to help squash and prevent from happening MANY common types of kernel vulnerabilities and bugs (remember, "all input is evil!" and this change forces you to always be aware of that, which is something that C in the kernel does not.)

I had always felt that Rust was the future for what we need to do in Linux, but now I'm sure, because if we can do stuff like this, with no overhead involved (it's all checked at build time), then we would be foolish not to give it a real try.

And yes, I've asked for this for years from the C developers, and maybe we can also do it there, but it's not obvious how and no one has come up with a way to do so. Maybe now they will have some more incentive :)
5
122
166
sj

sj

Reply to @sj
Now I'm onboarding onto the next ship. So from now on, the views expressed herein do not reflect the views of their employers ;)
1
0
4
sj
repeated
corbet

Jonathan Corbet

I have often complained that, even though thousands of developers are paid to work on the Linux kernel, there is not a single person whose job it is to write documentation for the kernel. The problem is wider than that, though: Alejandro Colomar, who has been maintaining the man pages collection for the last four years, can no longer afford to do it for free.

https://lwn.net/ml/all/4d7tq6a7febsoru3wjium4ekttuw2ouocv6jstdkthnacmzr6x@f2zfbe5hs7h5
5
79
66
sj

sj

Reply to @authentic_sammj@ozlabs.house
Edited 4 months ago
@authentic_sammj Thank you, Sam! It's not easy for me to say whether it will be cool. You know me ;) But I will hopefully share the next news soon. Let's see.
1
0
1
sj

sj

Edited 4 months ago
Today was my last day at Amazon. So from now on, the views expressed herein are those of the speakers;
They _do_ reflect the views of their employers (myself), until another announcement ;)
3
0
5
sj

sj

A new squad member has arrived from Germany.
0
1
2
sj

sj

Very impressive CXL-based memory tiering performance of HMSDK is shared[1] with a cool video. It is the grateful result of a collaboration between DAMON community and SK hynix. It was never a one-side help, but a collaboration. DAMON also gained its ability to do tiered memory managements from the collaboration.

I'm grateful to be a part of the work. I was always impressed and learned many things from SK hynix' innovative ideas and constructive discussions. I'm looking forward to continued collaborations and next outputs!

[1] https://www.linkedin.com/posts/honggyukim_ai-hpc-cxl-activity-7236734372266000385-zYuk?utm_source=share&utm_medium=member_desktop

#linux #kernel #damon
0
1
1
sj
repeated
gregkh

Greg K-H

Here's a link to the slides for my "Why are there so many kernel CVEs?" talk I gave at OSS China yesterday:
https://kccncossaidevchn2024.sched.com/event/ed2b39a9a0cdfc1df18de67ce0c2f6be

Link to git repo for the slides if the schedule site acts odd for you:
https://git.sr.ht/~gregkh/presentation-security

It was fun, and will be the "set up" for my Kernel Recipes talk in Paris in a few weeks (only 3 conferences to go between now and then, travel is back in full swing.)
5
26
39
sj
repeated
kernellogger@fosstodon.org

Thorsten Leemhuis (acct. 1/4)

Registration for @linuxplumbersconf reopened

'"This year there was a huge demand to attend Conference in person and at last we were able to add more places and reopen the registration."'

https://lpc.events/blog/current/index.php/2024/08/16/registration-is-now-reopened/

1
6
3
sj

sj

GitHub repos for non-kernel parts of DAMON project including 'damo', 'damon-tests' and 'damoos' will be moved from 'awslabs' to 'damonitor', by 2024-09-05: https://lore.kernel.org/20240813232158.83903-1-sj@kernel.org

#linux #kernel #damon #damo #damon-tests #damoos
0
1
1
sj
repeated
kees@fosstodon.org

Kees Cook tux

Building on the excellent codetag/alloc_tag infrastructure recently added to Linux, I've got an initial implementation of per-call-site kmalloc cache isolation:
https://lore.kernel.org/lkml/20240809072532.work.266-kees@kernel.org/

It's sure to give @vbabka nightmares and frustrate shared-cache use-after-free exploits. 😁

0
6
2
sj

sj

Edited 5 months ago
VLDB paper about Aurora Serverless V2, which reveals their usage of DAMON on the product, is now available: https://www.amazon.science/publications/resource-management-in-aurora-serverless

#linux #kernel #damon #aurora_serverless_v2
0
1
1
sj

sj

Edited 5 months ago
We are looking for DAMON recipes that I could share on upcoming OSSummit EU, or (hopefully) DAMON microconf at LPC'25: https://lore.kernel.org/20240724222119.58477-1-sj@kernel.org

#linux #kernel #damon #ossummit #linuxplumbers
0
1
1
Show older
About social.kernel.org

Terms of service

  1. Please do not use this service in violation of the Linux Kernel Code of Conduct. Doing so will result in your account suspension with the referral of the matter to the CoC committee.

  2. "Repeating"/"boosting" someone else's status on this platform will be treated as endorsement and will fall under rule #1.

  3. You are encouraged to use this platform to promote your work on the Linux Kernel, but there is no restriction on permitted topics (with the exception of anything covered by #1 above).

  4. There is no requirement to post in English, but it should be considered the primary language of communication on this platform.

Privacy notice

The admins of this service have access to all posted statuses. They aren't looking, but if it's something they shouldn't know about, then you should not post it on this platform.

Please see the Linux Foundation Privacy Policy, which applies to this platform as well.

Getting your own account

If you would like an account on this instance, please check that the following applies to you:

  • You are listed in MAINTAINERS or CREDITS

  • OR: You have a kernel.org account or email address

  • OR: You have a long and established history of involvement with the Linux Kernel

If the above is true and you agree with the Terms of Service and Privacy Notice listed above, please use these instructions to request an account: