Messages in this thread | | | Date | Tue, 11 Mar 2014 14:17:19 +0100 | From | Peter Zijlstra <> | Subject | Re: [RFC 0/6] rework sched_domain topology description |
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On Sat, Mar 08, 2014 at 12:40:58PM +0000, Dietmar Eggemann wrote: > > > >I don't have a strong opinion about using or not a cpu argument for > >setting the flags of a level (it was part of the initial proposal > >before we start to completely rework the build of sched_domain) > >Nevertheless, I see one potential concern that you can have completely > >different flags configuration of the same sd level of 2 cpus. > > Could you elaborate a little bit further regarding the last sentence? Do you > think that those completely different flags configuration would make it > impossible, that the load-balance code could work at all at this sd?
So a problem with such an interfaces is that is makes it far too easy to generate completely broken domains.
You can, for two cpus in the same domain provide, different flags; such a configuration doesn't make any sense at all.
Now I see why people would like to have this; but unless we can make it robust I'd be very hesitant to go this route.
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