Hi Julien > On 28 Jul 2022, at 9:50 pm, Julien Grall <jul...@xen.org> wrote: > > Hi Rahul, > > On 28/07/2022 16:37, Rahul Singh wrote: >> As you mentioned, if we don’t restrict the number of events channel for the >> dom0 system will boot slower. >> This is a good reason to restrict the number of event channels for dom0. > Let me start that I am still fine if you want to push for a new parameter (so > long it is not Arm specific). However, I am afraid that I will not be able to > argue for it because I don't see a strict need for it. > > Let me play the devil's advocate for a bit. AFAIU, you would like to > introduce the new parameter just to tell the admin the boot is going to be > slower if you use a event channel ID higher than N. > > To me this sounds like the same as if an admin decide to use 10GB rather than > 1GB. There will be slow down. > > This slowness is only boot specific and will not vary. So one could argue > this is easily noticeable and an admin can take remediation. > > Given Jan's objection, I would like to propose to document it in the bindings > instead (a concerned admin will likely read it). Below a rough proposal for > the documentation: > > "It is recommended to use low event channel ID." > > Would that be suitable for you?
Yes, that will works for me. I will restrict the max event channel for domU only and also add the comment in "docs/misc/arm/device-tree/booting.txt” as suggested by you. Regards, Rahul
