From e8ca1db29b349e780743c504cb735c8e1d542a8c Mon Sep 17 00:00:00 2001 From: "Dr. David Alan Gilbert" Date: Fri, 24 Feb 2017 18:28:29 +0000 Subject: postcopy: Transmit ram size summary word Replace the host page-size in the 'advise' command by a pagesize summary bitmap; if the VM is just using normal RAM then this will be exactly the same as before, however if they're using huge pages they'll be different, and thus: a) Migration from/to old qemu's that don't understand huge pages will fail early. b) Migrations with different size RAMBlocks will also fail early. This catches it very early; earlier than the detailed per-block check in the next patch. Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Laurent Vivier Reviewed-by: Juan Quintela Message-Id: <20170224182844.32452-2-dgilbert@redhat.com> Signed-off-by: Dr. David Alan Gilbert --- include/migration/migration.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/migration/migration.h b/include/migration/migration.h index 34a383e..6272adf 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -378,6 +378,7 @@ void global_state_store_running(void); void flush_page_queue(MigrationState *ms); int ram_save_queue_pages(MigrationState *ms, const char *rbname, ram_addr_t start, ram_addr_t len); +uint64_t ram_pagesize_summary(void); PostcopyState postcopy_state_get(void); /* Set the state and return the old state */ -- cgit v1.1