Gentoo Archives: gentoo-user

From: Corbin Bird <corbinbird@×××××××.net>
To: gentoo-user@l.g.o
Subject: [gentoo-user] Kernel 4.19.50 constant kernel hard locks / solved
Date: Fri, 14 Jun 2019 20:15:46
Message-Id: 3f17f51d-2853-b423-7c62-904fbfa67e75@charter.net
1 Disclosure :
2 1 : The CPU is a AMD FX-9590 ( Fam15h )
3 2 : Kernel command line parameter "eagerfpu=on" is being used.
4
5 This kernel option was causing constant kernel hard locks.
6 -----
7 General setup --> [ ] CPU isolation.
8 -----
9 Anything that accessed the FPU would cause the CPU's ( SMP ) to "loose
10 sync".
11
12 With the recent profile change, a lot of 32bit software had to be
13 re-compiled.
14
15 GCC locked up constantly while compiling "libssp".
16 The packages 'gmp,mpfr,mpc,isl,ffii' also caused lock-ups.
17 The audio/video codecs had lock-ups during the re-compile if any
18 assembler was used.
19 FFMPEG also locked up if 'hardcoded tables' was used, as well.
20
21 If you have a working FPU/Math Co-Processor, be very wary of this option.
22
23 Corbin

Replies

Subject Author
Re: [gentoo-user] Kernel 4.19.50 constant kernel hard locks / solved Adam Carter <adamcarter3@×××××.com>