From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:41779) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RUc6Y-0006gh-AX for qemu-devel@nongnu.org; Sun, 27 Nov 2011 05:37:03 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RUc6X-0004Gz-5C for qemu-devel@nongnu.org; Sun, 27 Nov 2011 05:37:02 -0500 Received: from mx1.redhat.com ([209.132.183.28]:5030) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RUc6W-0004Gs-Ri for qemu-devel@nongnu.org; Sun, 27 Nov 2011 05:37:01 -0500 Message-ID: <4ED212C7.1080901@redhat.com> Date: Sun, 27 Nov 2011 12:36:55 +0200 From: Avi Kivity MIME-Version: 1.0 References: <1322188529-11609-1-git-send-email-kernelfans@gmail.com> <1322361735-21428-1-git-send-email-kernelfans@gmail.com> In-Reply-To: <1322361735-21428-1-git-send-email-kernelfans@gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 2/2] kvm: exit to userspace with reason KVM_EXIT_VCPU_DEAD List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Liu Ping Fan Cc: aliguori@us.ibm.com, kvm@vger.kernel.org, qemu-devel@nongnu.org, linux-kernel@vger.kernel.org, ryanh@us.ibm.com, jan.kiszka@web.de On 11/27/2011 04:42 AM, Liu Ping Fan wrote: > From: Liu Ping Fan > > The vcpu can be safely released when > --1.guest tells us that the vcpu is not needed any longer. > --2.vcpu hits the last instruction _halt_ > > If both of the conditions are satisfied, kvm exits to userspace > with the reason vcpu dead. So the user thread can exit safely. > > Seems to be completely unnecessary. If you want to exit from the vcpu thread, send it a signal. -- error compiling committee.c: too many arguments to function