From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:46181) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Sym4f-0000z8-O9 for qemu-devel@nongnu.org; Tue, 07 Aug 2012 11:52:07 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Sym4e-0005Fs-Ml for qemu-devel@nongnu.org; Tue, 07 Aug 2012 11:52:01 -0400 Received: from mail-gh0-f173.google.com ([209.85.160.173]:50484) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Sym4e-0005Ff-IJ for qemu-devel@nongnu.org; Tue, 07 Aug 2012 11:52:00 -0400 Received: by ghrr17 with SMTP id r17so2161000ghr.4 for ; Tue, 07 Aug 2012 08:51:59 -0700 (PDT) Sender: Paolo Bonzini From: Paolo Bonzini Date: Tue, 7 Aug 2012 17:51:41 +0200 Message-Id: <1344354707-27315-1-git-send-email-pbonzini@redhat.com> Subject: [Qemu-devel] [RFC PATCH 0/6] Run incoming migration in a coroutine List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: owasserm@redhat.com, quintela@redhat.com Howdy, this series moves incoming migration to a coroutine, so that the monitor remains usable. I did this is as a step towards implementing an NBD server inside QEMU (which needs to configured and/or to serve requests during migration), but I think it is useful in general. Coroutines work very simply by making the file descriptor non-blocking. On EAGAIN you call qemu_coroutine_yield(); when the file descriptor becomes readable, you call qemu_coroutine_enter(). This is mostly an RFC on the approach. Still, it mostly consists of cleanups and the first 3 patches could be applied right away. What needs some refinement is the hideous passing of file descriptors in patch 4 and especially the last patch. Paolo Bonzini (6): migration: clean up server sockets and handlers before invoking process_incoming_migration migration: close socket QEMUFile from socket_close migration: move qemu_fclose to process_incoming_migration migration: remove iohandlers before closing the file migration: handle EAGAIN while reading QEMUFile migration: move process_incoming_migration to a coroutine migration-exec.c | 3 +-- migration-fd.c | 3 +-- migration-tcp.c | 12 ++++++------ migration-unix.c | 12 ++++++------ migration.c | 23 +++++++++++++++++++++-- migration.h | 2 +- savevm.c | 34 ++++++++++++++++++++++++++++------ 7 file modificati, 64 inserzioni(+), 25 rimozioni(-) -- 1.7.11.2