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authorDr. David Alan Gilbert <dgilbert@redhat.com>2015-11-05 18:11:04 +0000
committerJuan Quintela <quintela@redhat.com>2015-11-10 15:00:27 +0100
commitf0a227ade4b0331c9e12fc01f8b74e2531fd496d (patch)
tree23a8a5aa128c2ebb7410146c3c40aacbbe244765 /migration/savevm.c
parent1caddf8a819d83027d897997c0af10c426f88633 (diff)
postcopy: ram_enable_notify to switch on userfault
Mark the area of RAM as 'userfault' Start up a fault-thread to handle any userfaults we might receive from it (to be filled in later) Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'migration/savevm.c')
-rw-r--r--migration/savevm.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/migration/savevm.c b/migration/savevm.c
index 674f0fb953..a7210a22b4 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -1381,6 +1381,15 @@ static int loadvm_postcopy_handle_listen(MigrationIncomingState *mis)
return -1;
}
+ /*
+ * Sensitise RAM - can now generate requests for blocks that don't exist
+ * However, at this point the CPU shouldn't be running, and the IO
+ * shouldn't be doing anything yet so don't actually expect requests
+ */
+ if (postcopy_ram_enable_notify(mis)) {
+ return -1;
+ }
+
/* TODO start up the postcopy listening thread */
return 0;
}