/tech/ - Technology


Posting mode: Reply

Check to confirm you're not a robot
Drawing x size canvas

Remember to follow the rules

Max file size: 350.00 MB

Max files: 5

Max message length: 4096

Manage Board | Moderate Thread

Return | Catalog | Bottom

Expand All Images

Meltdown fix committed to OpenBSD Anonymous 02/23/2018 (Fri) 01:58:09 [Preview] No. 12419
>Meltdown mitigation is coming to OpenBSD. Philip Guenther (guenther@) has just committed a diff that implements a new mitigation technique to OpenBSD: Separation of page tables for kernel and userland. This fixes the Meltdown problems that affect most CPUs from Intel.
>When a syscall, trap, or interrupt takes a CPU from userspace to kernel the trampoline code switches page tables, switches stacks to the thread's real kernel stack, then copies over the necessary bits from the trampoline stack

Very good news. Let's see the performance impact. As undeadly contributor said, help test the snapshots from 22 february. Here (check the SHA256, please - use install62.fs for usb stick or install62.iso for CD-ROM):

Anonymous 02/23/2018 (Fri) 02:22:24 [Preview] No.12420 del
>linux patches in a day
>bsd patches in a month

Anonymous 02/23/2018 (Fri) 22:54:11 [Preview] No.12421 del
>linux does any crap diff because is employed on too many servers
>the diff reduces 50% of the performance, making servers owners waste much more money on energy
>bsd makes it simple, clean and secure. Take time, but it's did not messed too much with the kernel and is pretty verifiable for possible bugs/exploits.
>So far, no notice of performance impact, from what I know

You see, your argument is not so valid. Linux and BSD are different and users have different needs.

Anonymous 02/24/2018 (Sat) 00:53:38 [Preview] No.12422 del
Linux had a lot more forewarning of the bugs than the BSDs so patches were already in the works.

Anonymous 02/25/2018 (Sun) 11:39:37 [Preview] No.12424 del
(359.52 KB 500x599 me.png)
There's no performance impact because nobody fucking uses theoBSD.
probably this

Top | Return | Catalog | Post a reply