[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] RE: [PATCH][VTD][QUIRK] added quirks for Sandybridge errata workaround, WLAN, VT-d fault escalation
>>> On 20.01.11 at 00:40, "Kay, Allen M" <allen.m.kay@xxxxxxxxx> wrote: >> To me it would seem more logical to add a usage counter: When >> transitioning from zero, suppress RC6, and when transitioning to >> zero, re-enable RC6 (whatever this is). If what gets written in >> the preamble is some sort of counter the hardware decrements, >> you would need to extend the period each time execution flows >> through the preamble. > > I see what you are getting at ... Another alternative is to simply putting > the lock around the "preamble->iotlb_flush->postamble" sequence in iommu.c. > It > spills more of the quirk specific code into iommu.c but this should be much > simpler logic wise. What do you think? Wouldn't that result in excessive lock holding time? Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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