Re: KVM lock contention on 48 core AMD machine

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Le lundi 21 mars 2011 Ã 19:02 +0200, Avi Kivity a Ãcrit :

> Any ideas on how to fix it?  We could pre-allocate IDs and batch them in 
> per-cpu caches, but it seems like a lot of work.
> 

Hmm, I dont know what syscalls kvm do, but even a timer_gettime() has to
lock this idr_lock.

Sounds crazy, and should be fixed in kernel code, not kvm ;)



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