On Wed, 26 Sep 2018, Rob Prowel wrote: > On 09/23/18 17:19, Thomas Gleixner wrote: > > > > > > Other than RTFM, or please build a bunch of kernels from source on your > > > slow > > > machine, using differing config options to help track down the cause of > > > this...any thoughts about a solution? > > > > Yes. This was decoded recently as an issue on 32bit due to a calculation > > which is based on 'unsigned long' but requires to be 64bit wide. > > > > It's in the 4.18.8 stable kernel, which should be available from your > > fedora repo anytime soon. > > OK. Followup on AMD performance counter problem in 4.18.7 > > The Dell machine I was experiencing the problem on had a lot of ACPI > issues. One of the invalid ACPI entries was for a system timer. > dmesg suggests that the broken timer was used in calculating the > Athlon performance value. So no, 32/64 bit math was not the issue.
Uff. > ACPI=off in the kernel boot line fixed the issue completely. Machine > still functions well as a file/web/postgresql dev server so it's all > good. Thanks for letting me know. I was about to dust of that old X2 I have somewhere. Thanks, tglx