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(parent: f90bb71) | patch
postcopy: use UFFDIO_ZEROPAGE only when available
authorDr. David Alan Gilbert <dgilbert@redhat.com>
Mon, 12 Mar 2018 17:20:58 +0000 (17:20 +0000)
committerMichael S. Tsirkin <mst@redhat.com>
Tue, 20 Mar 2018 03:03:27 +0000 (05:03 +0200)
commit2ce16640b4cc9ab9e7e6bde9e4264b102e0eb73d
treed35a0ed702eaf057ffbd886db9c54d911ee2dd76tree | snapshot
parentf90bb71bfdaca6ece1696e194aad11fb8599ffbacommit | diff
postcopy: use UFFDIO_ZEROPAGE only when available

Use a flag on the RAMBlock to state whether it has the
UFFDIO_ZEROPAGE capability, use it when it's available.

This allows the use of postcopy on tmpfs as well as hugepage
backed files.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
exec.c diff | blob | history
include/exec/cpu-common.h diff | blob | history
migration/postcopy-ram.c diff | blob | history
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