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Re: [Xen-devel] Real-time support
| To: | "Ky Srinivasan" <ksrinivasan@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Real-time support |
| From: | "Geoffrey Lefebvre" <geoffrey@xxxxxxxxx> |
| Date: | Fri, 11 May 2007 10:53:20 -0700 |
| Cc: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Fri, 11 May 2007 10:51:49 -0700 |
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One way to deal with the problem you mention here is to have the guest OS have the smarts to (a) check for preemption conditions that may arise because a higher priority thread in the guest is runnable and (b) re-issue the hypercall that was only partially completed. Hi, Yes i agree. Preempting the hypercall and returning an indication of forward progress to the guest as is currently done with multicall, etc should work. I misunderstood Ian Pratt's earlier suggestion. I thought his idea was to preempt the hypercall and keep preemption state inside the hypervisor. My mistake :). cheers, Geoffrey _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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