From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Tosatti Subject: [patch uq/master 1/4] qemu: block SIGCHLD in vcpu thread(s) Date: Wed, 17 Feb 2010 20:14:40 -0200 Message-ID: <20100217221700.966865697@redhat.com> References: <20100217221439.351652889@redhat.com> Cc: avi@redhat.com, Marcelo Tosatti <"mtosa..."@redhat.com> To: kvm@vger.kernel.org Return-path: Received: from mx1.redhat.com ([209.132.183.28]:4732 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752819Ab0BQWSw (ORCPT ); Wed, 17 Feb 2010 17:18:52 -0500 Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o1HMIpgT030557 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Wed, 17 Feb 2010 17:18:51 -0500 Content-Disposition: inline; filename=block-sigchld Sender: kvm-owner@vger.kernel.org List-ID: Otherwise a vcpu thread can run the sigchild handler causing waitpid() from iothread to fail. Signed-off-by: Marcelo Tosatti Index: qemu/vl.c =================================================================== --- qemu.orig/vl.c +++ qemu/vl.c @@ -3514,6 +3514,7 @@ static void block_io_signals(void) sigaddset(&set, SIGUSR2); sigaddset(&set, SIGIO); sigaddset(&set, SIGALRM); + sigaddset(&set, SIGCHLD); pthread_sigmask(SIG_BLOCK, &set, NULL); sigemptyset(&set);