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Subject: [PATCH v9 6/8] migration/ram.c: add a function to disable the bulk stage
This patch adds a function to enable a precopy notifier callback outside the migration subsystem to disable the bulk stage flag. This is needed by the free page optimization offered by virtio-balloon. Signed-off-by: Wei Wang <wei.w.wang@intel.com> CC: Dr. David Alan Gilbert <dgilbert@redhat.com> CC: Juan Quintela <quintela@redhat.com> CC: Michael S. Tsirkin <mst@redhat.com> CC: Peter Xu <peterx@redhat.com> --- include/migration/misc.h | 1 + migration/ram.c | 9 +++++++++ 2 files changed, 10 insertions(+) diff --git a/include/migration/misc.h b/include/migration/misc.h index 0bac623..67cb275 100644 --- a/include/migration/misc.h +++ b/include/migration/misc.h @@ -30,6 +30,7 @@ typedef enum PrecopyNotifyReason { void precopy_infrastructure_init(void); void precopy_add_notifier(Notifier *n); void precopy_remove_notifier(Notifier *n); +void precopy_disable_bulk_stage(void); void ram_mig_init(void); void qemu_guest_free_page_hint(void *addr, size_t len); diff --git a/migration/ram.c b/migration/ram.c index 65b1223..8745ca3 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -352,6 +352,15 @@ static void precopy_notify(PrecopyNotifyReason reason) notifier_list_notify(&precopy_notifier_list, &reason); } +void precopy_disable_bulk_stage(void) +{ + if (!ram_state) { + return; + } + + ram_state->ram_bulk_stage = false; +} + uint64_t ram_bytes_remaining(void) { return ram_state ? (ram_state->migration_dirty_pages * TARGET_PAGE_SIZE) : -- 1.8.3.1
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