On 27.06.2025 23:58, Stefano Stabellini wrote: > On Fri, 27 Jun 2025, Julien Grall wrote: >> Hi Stefano, >> >> On 19/06/2025 01:45, Stefano Stabellini wrote: >>> On Wed, 18 Jun 2025, Jan Beulich wrote: >>>> On 18.06.2025 02:39, Stefano Stabellini wrote: >>>>> On Thu, 12 Jun 2025, Jan Beulich wrote: >>>>>> On 11.06.2025 21:07, Stefano Stabellini wrote: >>>>>>> On Wed, 11 Jun 2025, Jan Beulich wrote: >>>>>>>> On 11.06.2025 02:07, dm...@proton.me wrote: >>>>>>>>> On Tue, Jun 10, 2025 at 10:21:40AM +0200, Jan Beulich wrote: >>>>>>>>>> On 06.06.2025 22:11, dm...@proton.me wrote: >>>>>>>>>>> From: Denis Mukhin <dmuk...@ford.com> >>>>> If I understood correctly I like your proposal. Let me rephrase it to >>>>> make sure we are aligned. You are suggesting that: >>>>> >>>>> - domains without input focus will print with a (d<N>) prefix >>>>> - the domain with input focus will print without a (d<N>) prefix >>>>> - this applies to both DomUs and Dom0 >>>> >>>> Except in the non-dom0less case, at least up and until there's at least >>>> one other domain. I.e. I'd like to keep Dom0 boot output as it is today, >>>> regardless of the presence of e.g. "conswitch=". >>> >>> In the non-dom0less case, since dom0 has focus, it would naturally be >>> without (d<N>) prefix. Unless the user passes "conswitch=". Honestly, I >>> wouldn't special-case conswitch= that way and would prefer keep things >>> simple and consistent without corner cases. I don't think conswitch= is >>> so widely used that it is worth the complexity to special-case it. >> >> I am a bit confused with the wording. Before I can provide another opinion, I >> want to understand a bit more the concern. >> >> From my understanding the command line option "conswitch" is to allow the >> admin to change with key is used to switch between Dom0 and Xen. By default >> this is 'a'. So are you referring to the fact a trailing "x" (to not switch >> to >> dom0 console) can be added? > > Yes, conswitch can also be used to ask Xen to keep the input focus to > itself, instead of giving it away to Dom0. I think this is the specific > feature Jan was referring to when he said he is using conswitch and the > proposal would change the way the output looks like for him, which is > true. > > Today, dom0 would still print without any prefix. > > Tomorrow with this proposal, dom0 would print with a "(d0)" prefix > because it doesn't have input focus. > > The question is, with the new policy in place, whether this is worth the > trouble of having a special case to remove the "(d0)" prefix in the > conswitch=x case. I think it is not worth it, Jan thinks it is.
Just to clarify: Along with this mode being entered by conswitch=, I also expect the behavior to remain unaltered when booting (non-dom0less) without that option, and later flipping focus between Xen and Dom0 by using triple Ctrl-a. I'm saying this just to make sure that an eventual change to the patch wouldn't be keyed to the use of the command line option. Jan
