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[Xen-devel] PG_arch_1
| To: | "Xen Mailing List" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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| Subject: | [Xen-devel] PG_arch_1 |
| From: | "Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx> |
| Date: | Tue, 6 Dec 2005 17:13:19 -0800 |
| Delivery-date: | Wed, 07 Dec 2005 01:13:52 +0000 |
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| Thread-index: | AcX6y2kO69V8qMOKTpun+DtK5qElnQ== |
| Thread-topic: | PG_arch_1 |
Xenlinux uses a special architecture-dependent bit in the page table, called PG_arch_1 to indicate that a page is "foreign" (PG_foreign). It also apparently uses it to determine if a page is pinned (PG_pinned). Linux/ia64 (and apparently Linux/ppc and Linux/ppc64) use the PG_arch_1 bit for other purposes. On Linux/ia64, it is used to determine if the instruction cache needs to be flushed (e.g. if writing data into code pages). Any thought on this apparent conflict? Thanks, Dan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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