[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Re: [PATCH 1/4] CPU online/offline support in Xen
On 18/9/08 09:13, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> wrote: >>> Hmm, I think current NMI_MCE_SOFTIRQ can't make sure other >> guest will not be >>> scheduled. Considering there is a schedule softirq already >> pending on the >>> pCPU, other guest may run before the impacted guest. Did I >> missed anything? >> >> There are races here in any case. What if #MC happens halfway >> through the >> scheduler, just before set_current(new)? > > If MCE handler will not cause schedule and not change current, will any issue > happen? I'm not sure exactly what you mean. What *I* meant was that there are certain points during execution where, if a #MC occurs, it may not be possible to determine which single vCPU was running on the pCPU. I guess though that if you ever get unrecoverable errors reported while running inside the hypervisor, you probably can't recover anyway. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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