[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] domU page fault handling
Thank you Ian,I will try with the new version of Xen and come back to you if necessary. Alain On Mon, 14 Jul 2014 10:02:39 +0100, Ian Campbell wrote: On Sat, 2014-07-12 at 05:15 +0200, TCHANA Alain wrote:Hi all, I would like to know where (in Xen or Linux source code) a domU page fault is treated in a Xen (version Xen 4.2).4.2 is quite old to be asking development question of. You should lookat least at 4.4 and at mainline kernel trees.Is it treated by: 1) the domU operating system do_page_fault() routine, in linux-source-xxx/arch/x86/mm/fault.c. In this case, how does the modification of domU page tables are possible since a domU is not allowed to update them.These updates happen via the usual hypercall mechanisms.or 2) the hypervisor do_page_fault() routine, in xen/arch/x86/traps.c. In this case, how does the domU maintains its internal page fault stats.Xen will take the original h/w page fault here and, if it is for the guest, send it onwards by injecting it into the guest. Ian. _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxx http://lists.xen.org/xen-users
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