Liuqiming (John) wrote on 2015-10-10: > > On 2015/10/10 14:32, Zhang, Yang Z wrote: >> Zhang, Yang Z wrote on 2015-09-24: >>> Liuqiming (John) wrote on 2015-09-24: >>>> >>>> On 2015/9/24 11:25, Zhang, Yang Z wrote: >>>> it completed, the following vmentry will pick up the pending interrupt. >>>> If you send the ipi unconditionally, actually it is received by >>>> hypervisor and the interrupt handler dose nothing. You still rely >>>> on the vmentry to pick up the interrupt. My confusion is: when >>>> vmentry, does physical CPU inject all interrupts on PIR into VM >>>> and clear POSTED_INTR_ON bit? Or just inject the highest index of >>>> PIR and may leave POSTED_INTR_ON bit being set to 1? >>> I need to say your understanding is wrong. What we need to do is >>> sync the pir to irr and let hardware or hypervisor to handle left >>> part. So our focus is how to sync pir to irr correctly and timely. >>> We don't care how the interrupt in PIR is injected to guest. >> Hi Qiming, is there any other question with it? Also, do you have any >> chance to test it? >> >> Best regards, >> Yang > No other question. > I have run some vm start-shutdown test, and haven't gotten a chance > to test the performance.
Hi Qiming Have your tested the performance? If it fixes your performance issue, I will send out a formal patch. btw, is it ok to add you in signed-by since the origin one is from you? Best regards, Yang _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
