This is pretty strange, could someone explain it to me? Wasn't mwait
bugged in ryzen?
Tired of the random freezes, I tried this:
--- ./arch/x86/kernel/acpi/cstate.c.orig 2018-10-22 08:37:37.000000000 +0200
+++ ./arch/x86/kernel/acpi/cstate.c 2019-03-20 19:26:45.261101857 +0100
@@ -86,6 +86,7 @@ static long acpi_processor_ffh_cstate_pr
num_cstate_subtype = edx_part & MWAIT_SUBSTATE_MASK;
retval = 0;
+#if 0
/* If the HW does not support any sub-states in this C-state */
if (num_cstate_subtype == 0) {
pr_warn(FW_BUG "ACPI MWAIT C-state 0x%x not supported by HW
(0x%x)\n",
@@ -93,6 +94,7 @@ static long acpi_processor_ffh_cstate_pr
retval = -1;
goto out;
}
+#endif
/* mwait ecx extensions INTERRUPT_BREAK should be supported for C2/C3 */
if (!(ecx & CPUID5_ECX_EXTENSIONS_SUPPORTED) ||
And I don't have any freeze since 3 days...
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https://bugs.launchpad.net/bugs/1690085
Title:
Ryzen 1800X freeze - rcu_sched detected stalls on CPUs/tasks
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