[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] xc_get_pfn_list() creates broken core files
On 23/11/06 6:53 pm, "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx> wrote: >> Pagetables etc. are all in 'p' address space, so there should >> be no need for p2m or m2p in that case I think >> >> In fact pagetables could be canonicalised into 'p' space for >> PV guests too (xc_linux_save has the code for this) then >> there'd be no need to dump the p2m table in the core dump at >> all. Save format and core dump format should probably be one >> and the same! > > Trouble is, the PV guest hasn't done an orderly suspend, and may be > holding machine address references in registers/memory and in pagetables > that haven't been pinned yet. > > The guest's core dump will already contain the p2m table, and its root > location has been registered with xen during boot, so this just needs to > be saved too. It's questionable how useful the ability to m2p-translate those marginally possible bits of state is though. Currently the p2m table is used *only* to construct an m2p table allowing pagetable walks in xc_ptrace_core(). -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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