From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47370) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fI6gN-0006dK-1O for qemu-devel@nongnu.org; Mon, 14 May 2018 02:10:05 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fI47B-00015W-PU for qemu-devel@nongnu.org; Sun, 13 May 2018 23:25:34 -0400 Received: from mail-pf0-x244.google.com ([2607:f8b0:400e:c00::244]:45470) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fI47B-00014F-Hm for qemu-devel@nongnu.org; Sun, 13 May 2018 23:25:33 -0400 Received: by mail-pf0-x244.google.com with SMTP id c10-v6so5305914pfi.12 for ; Sun, 13 May 2018 20:25:33 -0700 (PDT) From: Zhang Chen Date: Mon, 14 May 2018 11:23:48 +0800 Message-Id: <1526268228-27951-18-git-send-email-zhangckid@gmail.com> In-Reply-To: <1526268228-27951-1-git-send-email-zhangckid@gmail.com> References: <1526268228-27951-1-git-send-email-zhangckid@gmail.com> Subject: [Qemu-devel] [PATCH V7 17/17] COLO: quick failover process by kick COLO thread List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Eric Blake , Markus Armbruster , Paolo Bonzini , Zhang Chen , "Dr . David Alan Gilbert" , Jason Wang , zhanghailiang From: zhanghailiang COLO thread may sleep at qemu_sem_wait(&s->colo_checkpoint_sem), while failover works begin, It's better to wakeup it to quick the process. Signed-off-by: zhanghailiang --- migration/colo.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/migration/colo.c b/migration/colo.c index d67bdc2..a7e0eaa 100644 --- a/migration/colo.c +++ b/migration/colo.c @@ -135,6 +135,11 @@ static void primary_vm_do_failover(void) migrate_set_state(&s->state, MIGRATION_STATUS_COLO, MIGRATION_STATUS_COMPLETED); + /* + * kick COLO thread which might wait at + * qemu_sem_wait(&s->colo_checkpoint_sem). + */ + colo_checkpoint_notify(migrate_get_current()); /* * Wake up COLO thread which may blocked in recv() or send(), @@ -552,6 +557,9 @@ static void colo_process_checkpoint(MigrationState *s) qemu_sem_wait(&s->colo_checkpoint_sem); + if (s->state != MIGRATION_STATUS_COLO) { + goto out; + } ret = colo_do_checkpoint_transaction(s, bioc, fb); if (ret < 0) { goto out; -- 2.7.4