Re: multiple vcpus in a domain

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Thu, Mar 11, 2021 at 01:29:01AM -0800, John Nemeth wrote:
> On Mar 11, 10:03, Manuel Bouyer wrote:
> } On Wed, Mar 10, 2021 at 08:11:25PM -0800, John Nemeth wrote:
> } > On Mar 10, 13:56, Greg Troxel wrote:
> } > } 
> } > } I wrote in the HOWTO that as of current NetBSD dom0 supports multiple
> } > } CPUs, and want to check that this is right.
> } > } 
> } > } I think:
> } > } 
> } > }    8, 9, current XEN3_DOMU all can have multiple vcpus and use them and
> } > }    this is basically working fine
> } > 
> } >      domU has been multiprocessor since 6.0.
> } > 
> } > }    8, 9 XEN3_DOM0 are not built with options MULTIPROCESSOR and if given
> } > }    >1 vcpu will just ignore all but one
> } > 
> } >      This is likely not true.  I ran a test server with dom0
> } > multiprocessor some time ago.
> } 
> } You've been lukcy then. Some parts of dom0 support is not MP-safe in -9.
> 
>      Who said anything about -9?  :->  It would have been -8 or
> even earlier when cherry@ first asked for testers.

If -9 was not MP-safe, earlier version were not either.
I know, I wrote this code ...

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--