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Re: [Xen-devel] [PATCH 5/5] just realized that it's broken
| To: | Jan Beulich <jbeulich@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH 5/5] just realized that it's broken |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Fri, 30 Jan 2009 11:35:56 +0000 |
| Cc: | |
| Delivery-date: | Fri, 30 Jan 2009 03:36:10 -0800 |
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| Thread-topic: | [Xen-devel] [PATCH 5/5] just realized that it's broken |
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Fortunately I think it can be got rid of and probably at little or no performance cost. I will take a look maybe next week. -- Keir On 30/01/2009 10:48, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: > This patch was moving the cpumask out of struct page_info into the page > itself, but I just realized that this it not valid, since the purpose of the > mask > is to avoid a later TLB flush, hence the base assumption is that the page > might still be in the TLB of some CPU, thus making it possible for a mis- > behaved guest to still write to that page. > > Sorry for the mis-numbering, > Jan > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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