[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [PATCH 0/2] xen: credit2: limit the number of CPUs per runqueue
> On May 29, 2020, at 12:46 PM, Dario Faggioli <dfaggioli@xxxxxxxx> wrote: > > So, > > I felt like providing some additional thoughts about this series, from > a release point of view (adding Paul). > > Timing is *beyond tight* so if this series, entirely or partly, has any > chance to go in, it would be through some form of exception, which of > course comes with some risks, etc. > > I did work hard to submit the full series, because I wanted people to > be able to see the complete solution. However, I think the series > itself can be logically split in two parts. > > Basically, if we just consider patches 1 and 4 we will end up, right > after boot, with a system that has smaller runqueues. They will most > likely be balanced in terms of how many CPUs each one has, so a good > setup. This will likely (actual differences seems to depend *quite a > bit* on the actual workload) be an improvement for very large systems. Fundamentally, I feel like the reason we have the feature freeze is exactly to have to avoid questions like this. Something very much like patch 4 was posted before the last posting date; patches 1-4 received R-b’s before the feature freeze. I think they should probably go in. The rebalancing patches I’m inclined to say should wait until they’ve had a bit more time to be thought about. -George
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