[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [RFC PATCH] page_alloc: use first half of higher order chunks when halving
>>> On 14.04.14 at 16:40, <konrad.wilk@xxxxxxxxxx> wrote: > That was OK, but the M2P lookup table was not too thrilled with this. > Perhaps I should have used another hypercall to re-arrange the M2P? > I think I did try 'XENMEM_exchange' but that is not the right call either. Yeah, that's allocating new pages in exchange for your old ones. Not really what you want. > Perhaps I should use XENMEM_remove_from_physmap/XENMEM_add_to_physmap > combo ? A pair of MMU_MACHPHYS_UPDATE operations would seem to be the right way of doing this (along with respective kernel internal accounting like set_phys_to_machine(), and perhaps a pair of update_va_mapping operations if the 1:1 map is already in place at that time, and you care about which page contents appears at which virtual address). Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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