On Tue, 2010-10-05 at 10:47 +0100, Ian Campbell wrote: > > In addition to the kernel logging of the error I get this from the > hypervisor: > (XEN) mm.c:2062:d0 Error pfn 16d99: rd=ffff83011fefa000, > od=0000000000000000, caf=180000000000000, taf=0000000000000000 > (XEN) mm.c:658:d0 Could not get page ref for pfn 16d99 > (XEN) mm.c:3621:d0 Could not get page for mach->phys update
Adding a bit more logging to the kernel I get: gnttb_copy_grant_page old c22ebcd8 P:0x1ec8e M:0xc499d F:0x41000000 gnttb_copy_grant_page new c2324ce0 P:0x1fe18 M:0x11cd32 F:0x40000000 (XEN) mm.c:2062:d0 Error pfn 1cd32: rd=ffff83011fefa000, od=0000000000000000, caf=180000000000000, taf=0000000000000000 (XEN) mm.c:658:d0 Could not get page ref for pfn 1cd32 (XEN) mm.c:3621:d0 Could not get page for mach->phys update Notice how MFN 0x11cd32 has become 0x1cd32 by the time it gets to the hypervisor! The following fixes it for me. From: Ian Campbell <[email protected]> Subject: xen: grant table: do not truncate machine address on gnttab_copy_grant_page Signed-off-by: Ian Campbell <[email protected]> --- a/drivers/xen/grant-table.c +++ b/drivers/xen/grant-table.c @@ -578,7 +578,7 @@ int gnttab_copy_grant_page(grant_ref_t ref, struct page **pagep) if (!xen_feature(XENFEAT_auto_translated_physmap)) { set_phys_to_machine(page_to_pfn(new_page), INVALID_P2M_ENTRY); - mmu.ptr = (new_mfn << PAGE_SHIFT) | MMU_MACHPHYS_UPDATE; + mmu.ptr = ((u64)new_mfn << PAGE_SHIFT) | MMU_MACHPHYS_UPDATE; mmu.val = pfn; err = HYPERVISOR_mmu_update(&mmu, 1, NULL, DOMID_SELF); BUG_ON(err); -- Ian Campbell Current Noise: Akercocke - Son Of The Morning "I'd love to go out with you, but the man on television told me to stay tuned." -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
