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[Xen-devel] Xeno Linux never pins L1 tables ?
| To: | Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Xeno Linux never pins L1 tables ? |
| From: | Satya <satyakiran@xxxxxxxxx> |
| Date: | Tue, 16 Oct 2007 09:44:24 -0500 |
| Delivery-date: | Tue, 16 Oct 2007 07:45:02 -0700 |
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hi, I'm developing my own 32-bit (no PAE) paravirtualized kernel for xen with Mini-OS as a starting point. I am currently working on process page table support (equivalent of arch/i386/mm/pgtable-xen.c) and mostly following Linux for the moment. I noticed that linux-2.6.18-xen never pins an L1 table (a pte), yet __pgd_pin() walks the page directory and gives up write access on the kernel mappings of pte pages and only pins the pgd page. How do set_pte() and set_pte_at() macros work if they are writing directly to the page table entires ? do we fault in the kernel to handle this ?! thanks, satya. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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