Archives
Archives
| From: | Adam Carter <adamcarter3@×××××.com> | ||
|---|---|---|---|
| To: | gentoo-user@l.g.o | ||
| Subject: | Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor | ||
| Date: | Thu, 04 Jan 2018 03:34:09 | ||
| Message-Id: | CAC=wYCFiJe+MkTrSBCVR11fTvsRH7U5sbnxf60VYOoA4tHyQyQ@mail.gmail.com | ||
| In Reply to: | Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor by Adam Carter |
||
| 1 | > |
| 2 | > Project Zero (Google) found it; |
| 3 | > https://googleprojectzero.blogspot.com.au/2018/01/ |
| 4 | > reading-privileged-memory-with-side.html |
| 5 | > |
| 6 | > Phoronix has done some benchmarks on the impact of the kernel based |
| 7 | > workaround ([Kernel] Page Table Isolation (PSI) nee Kaiser) |
| 8 | > https://www.phoronix.com/scan.php?page=article&item=linux- |
| 9 | > more-x86pti&num=1 |
| 10 | > |
| 11 | > |
| 12 | Re:AMD - Looks like Linus agrees that PTI is not required for AMD CPUs. |
| 13 | Note that the project zero blog mentions that some AMD chips are subject to |
| 14 | some issues*. *There's three CVEs |
| 15 | *.* |
| 16 | |
| 17 | From: |
| 18 | https://www.phoronix.com/scan.php?page=news_item&px=Linux-Tip-Git-Disable-x86-PTI |
| 19 | *"Update:* Linus Torvalds has now ended up pulling |
| 20 | <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=00a5ae218d57741088068799b810416ac249a9ce&utm_source=anz> |
| 21 | the latest PTI fixes that also include the change to disable page table |
| 22 | isolation for now on all AMD CPUs. The commit is in mainline for Linux 4.15 |
| 23 | along with a few basic fixes and ensuring PAGE_TABLE_ISOLATION is enabled |
| 24 | by default. " |
| Subject | Author |
|---|---|
| Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor | Corbin Bird <corbinbird@×××××××.net> |
| Re: [gentoo-user] Expect a ~15% average slowdown if you use an Intel processor | Jalus Bilieyich <countolaf17@×××××.com> |