[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] conditional clearing of dom0_l2 in i386's zap_low_mappings() ?
On 28/10/2010 16:49, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote: >>>> On 28.10.10 at 17:30, Keir Fraser <keir@xxxxxxx> wrote: >> On 28/10/2010 15:50, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote: >> >>> What is the reason for not unconditionally clearing the whole L2 >>> directory here? There shouldn't be anything in the first Gb that >>> wasn't placed there just temporarily by Xen... >> >> You mean the conditional within the for loop that clears dom0 l2 entries? If >> we zapped all of dom0's l2 entries, we'd also be zapping the entries >> legitimately just created by the dom0 builder! > > Oh, I didn't look closely enough. I actually just meant all the > entries in the first of the four L2 tables. Oh I see. Well possibly. But you might still need the conditional for the other three slots anyway, so it wouldn't be a simplification in that case. -- Keir > Jan > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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