Re: 4.15 removal? Is 4.20 recommended over 4.18?

[Greg Troxel <gdt%lexort.com@localhost>]

Manuel Bouyer <bouyer%antioche.eu.org@localhost> writes:

>>   If someone is going to run xen, should they pick 4.18 or 4.20?   If
>>   the answer isn't "they should just pick 4.20; of course the more
>>   recent release is better" then why?
>
> - Xen 4.18 has beem more tested
> - Xen 4.20 will be security-supported for a longer time (2028-03-05 vs 
>   2026-11-16).
> - Xen 4.18 won't get new features or hardware support.

Thanks, howto updated.

>> 
>>   If running xen 4.20 on any of netbsd 9, 10, 11, current, with amd64
>>   dom0, and domUs of i3856 and amd64 (with pvshim for i386 pv, as the
>>   howto says), does anything not work right?
>
> One thing I noticed with Xen 4.20, which didn't happen with 4.18,
> is that HVM guest sometimes fail to start. This shows up quite often in
> https://largo.lip6.fr/~bouyer/NetBSD-tests/xen/ but it's hard to reproduce
> from command line (I guess it's because the tests starts several VMs in
> parallel). Looks like a race condition. It's not critical as it seems rare
> on normal usage, and running xl create again probably works around it.

I put in a note and requested other-than-nominal behavior to be reported
here.