[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-devel] Re: [PATCH] Fix cpu hotplug bug of mtrr update inconsistency
Keir Fraser wrote: > On 01/06/2010 10:18, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx> wrote: > >> I suggest we leave the call where it is, and fix set_mtrr() to not >> race CPUs coming online. It is called elsewhere other than >> mtrr_ap_init() after all. Also if you call mtrr_ap_init() before >> being in cpu_online_map, you then race further MTRR changes: >> - CPU X calls mtrr_ap_init() >> - CPU Y calls set_mtrr() to actually change an MTRR. >> - CPU X adds itself to cpu_online_map >> - Aiee, CPU X is missing Y's update >> >> I'll make a patch. > > xen-unstable:21499. > > -- Keir Yeah, good method :) _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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