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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 1/2] x86/xen: do not identity map UNUSABLE regions in the machine E820
On 16/08/13 16:23, Konrad Rzeszutek Wilk wrote: > On Fri, Aug 16, 2013 at 03:42:55PM +0100, David Vrabel wrote: >> From: David Vrabel <david.vrabel@xxxxxxxxxx> >> >> If there are UNUSABLE regions in the machine memory map, dom0 will >> attempt to map them 1:1 which is not permitted by Xen and the kernel >> will crash. >> >> There isn't anything interesting in the UNUSABLE region that the dom0 >> kernel needs access to so we can avoid making the 1:1 mapping and >> treat it as RAM. >> >> We only do this for dom0, as we do not expect any domU to ever have a >> UNUSABLE region in their pseudo-physical map. > > Hm, you are going to be disappointed that this is in libxl: The code is fine though since it only messes with UNUSABLE regions for the initial domain. Feel free to fix up the comments and commit description. David _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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