Gentoo Archives: gentoo-user

From: Adam Carter <adamcarter3@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Kernel 4.19.50 constant kernel hard locks / solved
Date: Sun, 16 Jun 2019 10:34:28
Message-Id: CAC=wYCE58vMCxLRewFvU8gztBibNhV3tCMZD4xTfJaye549HKg@mail.gmail.com
In Reply to: [gentoo-user] Kernel 4.19.50 constant kernel hard locks / solved by Corbin Bird
1 On Sat, Jun 15, 2019 at 6:15 AM Corbin Bird <corbinbird@×××××××.net> wrote:
2
3 > Disclosure :
4 > 1 : The CPU is a AMD FX-9590 ( Fam15h )
5 > 2 : Kernel command line parameter "eagerfpu=on" is being used.
6 >
7 > This kernel option was causing constant kernel hard locks.
8 > -----
9 > General setup --> [ ] CPU isolation.
10 > -----
11 > Anything that accessed the FPU would cause the CPU's ( SMP ) to "loose
12 > sync".
13 >
14
15 Just to clarify; do i have this right?
16
17 General setup --> [ ] CPU isolation. -> this is the broken setting
18
19 General setup --> [*] CPU isolation. -> this works (and is the default)
20
21 AFAICT in 5.x onward all the lazy FPU code is gone so its just eager.

Replies

Subject Author
Re: [gentoo-user] Kernel 4.19.50 constant kernel hard locks / solved Corbin Bird <corbinbird@×××××××.net>