4e8c0c8c4b
Make the IOCTL_PRIVCMD_MMAPBATCH_V2 (and older V1 version) map
multiple frames at a time rather than one at a time, despite the pages
being non-consecutive GFNs.
xen_remap_foreign_mfn_array() is added which maps an array of GFNs
(instead of a consecutive range of GFNs).
Since per-frame errors are returned in an array, privcmd must set the
MMAPBATCH_V1 error bits as part of the "report errors" phase, after
all the frames are mapped.
Migrate times are significantly improved (when using a PV toolstack
domain). For example, for an idle 12 GiB PV guest:
Before After
real 0m38.179s 0m26.868s
user 0m15.096s 0m13.652s
sys 0m28.988s 0m18.732s
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
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| .. | ||
| interface | ||
| acpi.h | ||
| balloon.h | ||
| events.h | ||
| features.h | ||
| grant_table.h | ||
| hvc-console.h | ||
| hvm.h | ||
| page.h | ||
| platform_pci.h | ||
| swiotlb-xen.h | ||
| tmem.h | ||
| xen-ops.h | ||
| xen.h | ||
| xenbus.h | ||
| xenbus_dev.h | ||