Messages in this thread |  | | | Date | Wed, 19 Nov 2008 16:30:08 -0500 | | From | Gregory Haskins <> | | Subject | Re: RT sched: cpupri_vec lock contention with def_root_domain and no load balance |
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Dimitri Sivanich wrote: > On Wed, Nov 19, 2008 at 03:25:15PM -0500, Gregory Haskins wrote: > >> It sounds like the problem with my code is that "null sched domain" >> translates into "default root-domain" which is understandably unexpected >> by Dimitri (and myself). Really I intended root-domains to become >> associated with each exclusive/disjoint cpuset that is created. In a >> way, non-balanced/isolated cpus could be modeled as an exclusive cpuset >> with one member, but that is somewhat beyond the scope of the >> > > Actually, at one time, that is how things were setup. Setting the > cpu_exclusive bit on a single cpu cpuset would isolate that cpu from > load balancing. > Do you know if this was pre or post the root-domain code? Here is a reference to the commit:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=57d885fea0da0e9541d7730a9e1dcf734981a173
A bisection that shows when this last worked for you would be very appreciated if you have the time, Dimitri.
Regards, -Greg
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