You mean, they reduce the performance impact of meltdown&spectre fixes?
this post was submitted on 03 Feb 2024
93 points (100.0% liked)
Linux
48366 readers
1635 users here now
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Rules
- Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.
- No misinformation
- No NSFW content
- No hate speech, bigotry, etc
Related Communities
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
founded 5 years ago
MODERATORS
You forgot to mention the glibc/syslog backdoor discovered
Was it really a backdoor?
Backdoor implies it was deliberately put there. Looking at the CVE it does not seem intentional so just an exploit.
Are the latest generation (11th onwards) of Intel CPUs still affected by any of these two vulnerabilities?
Not by them directly but by other side channel attacks.
This is the best summary I could come up with:
Intel Thread Director support has come along with various Linux kernel improvements to better handle task placement between the P and E cores.
One area seeing new work now though is for virtual machines (VMs) running on Intel hybrid systems with a new Linux kernel patch series working on Thread Director Virtualization.
With this Intel Thread Director Virtualization to ensure the VM can properly manage task placement between P and E cores, the feature ended up yielding around 14% better performance than the status quo.
Our ITD virtualization is not bound to VMs' hybrid topology or vCPUs' CPU affinity.
To enable ITD related scheduling optimization in Win11 VM, some other thermal related support is also needed (HWP, CPPC), but we could emulate it with dummy value in the VMM (We'll also be sending out extra patches in the future for these)."
Interesting work and hopefully this Intel Thread Director Virtualization support will be worked into shape for mainlining into the Linux kernel in the near future for further enhancing Intel Core hybrid CPUs.
The original article contains 392 words, the summary contains 173 words. Saved 56%. I'm a bot and I'm open source!
Good Software > Powerful Hardware