Re: What to do about "WARNING: negative runtime; monotonic clock has gone backwards"

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

> Date: Thu, 13 Jul 2023 13:39:43 +0000
> From: Taylor R Campbell <riastradh%NetBSD.org@localhost>
> 
> > Date: Sat, 08 Jul 2023 14:34:56 -0400
> > From: Brad Spencer <brad%anduin.eldar.org@localhost>
> > 
> > [ 1792486.921759] kobj_checksyms, 988: [dtrace]: linker error: symbol `dtrace_invop_calltrap_addr' not found
> > [ 1792486.921759] kobj_checksyms, 988: [dtrace]: linker error: symbol `dtrace_invop_jump_addr' not found
> > [ 1792486.921759] kobj_checksyms, 988: [dtrace]: linker error: symbol `dtrace_trap_func' not found
> > [ 1792486.921759] WARNING: module error: unable to affix module `dtrace', error 8
> 
> Looks like nobody has wired up dtrace to Xen!  That's a pretty serious
> regression of Xen vs native x86.  Someone needs to hook these up.

Correction: Might just be that you need to build a kernel with
`options KDTRACE_HOOKS', which is apparently not the default in Xen.

Can you try that?

Maybe we should flip that on by default.