Lei Wang <lei4.w...@intel.com> wrote: > When destination VM is launched, the "backlog" parameter for listen() is set > to 1 as default in socket_start_incoming_migration_internal(), which will > lead to socket connection error (the queue of pending connections is full) > when "multifd" and "multifd-channels" are set later on and a high number of > channels are used. Set it to a hard-coded higher default value 512 to fix > this issue. > > Reported-by: Wei Wang <wei.w.w...@intel.com> > Signed-off-by: Lei Wang <lei4.w...@intel.com>
[cc'd daiel who is the maintainer of qio] My understanding of that value is that 230 or something like that would be more than enough. The maxiimum number of multifd channels is 256. Daniel, any opinion? Later, Juan. > --- > migration/socket.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/migration/socket.c b/migration/socket.c > index 1b6f5baefb..b43a66ef7e 100644 > --- a/migration/socket.c > +++ b/migration/socket.c > @@ -179,7 +179,7 @@ socket_start_incoming_migration_internal(SocketAddress > *saddr, > QIONetListener *listener = qio_net_listener_new(); > MigrationIncomingState *mis = migration_incoming_get_current(); > size_t i; > - int num = 1; > + int num = 512; > > qio_net_listener_set_name(listener, "migration-socket-listener");
