On 05/05/15 12:57, Stefano Stabellini wrote: > On Tue, 5 May 2015, Julien Grall wrote: >>> I think we should pause the guest vcpu until we receive >>> the interrupt. >>> You can do that by calling vcpu_block. >> >> Blocking the vcpu is not the right thing to do. The processing of the >> ITS command queue is asynchronous and the guest may decide to execute >> other task while waiting. > > Sure, but the hypervisor might have other things to do and other vcpus > to schedule as well. It is a matter of priorities and scheduling the > most appropriate workload. Keep in mind that vcpu_block doesn't > completely pause the guest, it just only blocks the vcpu until the next > guest event occurs.
I don't think it will help to get the guest booting faster. Linux is trying to read CREADR (The completion register) every millisecond. I suspect we will receive an IRQ faster than that. Regards, -- Julien Grall _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
