>>> On 06.09.18 at 16:01, <andrew.coop...@citrix.com> wrote: > alloc_vcpu()'s call to domain_update_node_affinity() has existed for a decade, > but its effort is mostly wasted. > > alloc_vcpu() is called in a loop for each vcpu, bringing them into existence. > The values of the affinity masks are still default, which is allcpus in > general, or a processor singleton for pinned domains. > > Furthermore, domain_update_node_affinity() itself loops over all vcpus > accumulating the masks, making it a scalability concern with large numbers of > vcpus. > > Move it to be called once after all vcpus are constructed, which has the same > net effect, but with fewer intermediate memory allocations and less cpumask > arithmetic. > > Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com>
Reviewed-by: Jan Beulich <jbeul...@suse.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
