From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=45259 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OGo3t-00088C-2H for qemu-devel@nongnu.org; Tue, 25 May 2010 02:56:26 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OGo3r-0005WT-L0 for qemu-devel@nongnu.org; Tue, 25 May 2010 02:56:24 -0400 Received: from e28smtp07.in.ibm.com ([122.248.162.7]:49671) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OGo3q-0005Uz-AZ for qemu-devel@nongnu.org; Tue, 25 May 2010 02:56:23 -0400 Received: from d28relay01.in.ibm.com (d28relay01.in.ibm.com [9.184.220.58]) by e28smtp07.in.ibm.com (8.14.3/8.13.1) with ESMTP id o4P6uD1t015532 for ; Tue, 25 May 2010 12:26:13 +0530 Received: from d28av02.in.ibm.com (d28av02.in.ibm.com [9.184.220.64]) by d28relay01.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o4P6uD4p3530914 for ; Tue, 25 May 2010 12:26:13 +0530 Received: from d28av02.in.ibm.com (loopback [127.0.0.1]) by d28av02.in.ibm.com (8.14.3/8.13.1/NCO v10.0 AVout) with ESMTP id o4P6uCrV006788 for ; Tue, 25 May 2010 16:56:13 +1000 Date: Tue, 25 May 2010 12:26:01 +0530 From: Gautham R Shenoy Subject: Re: [Qemu-devel] KVM call agenda for May 25 Message-ID: <20100525065601.GA28183@in.ibm.com> References: <20100525002104.GM7635@x200.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100525002104.GM7635@x200.localdomain> Reply-To: ego@in.ibm.com List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Chris Wright Cc: kvm@vger.kernel.org, qemu-devel@nongnu.org, sripathik@in.ibm.com, "Aneesh Kumar K.V" , Corentin Chary , jvrao On Mon, May 24, 2010 at 05:21:04PM -0700, Chris Wright wrote: > Please send in any agenda items you are interested in covering. > Sorry for the delayed response. If the community is interested, I would like to discuss the Generic Asynchronous task offloading framework patches posted to the community on 24th May 2010. URL:http://lists.gnu.org/archive/html/qemu-devel/2010-05/msg02227.html Brief Description: The patch series extracts out the task offloading framework code from posix-aio-compat.c which is currently being used only by the paio subsystem to create a generic task offloading framework that could be used by other subsystems within qemu. Currently virtio-9p and asynchronous-encoding from vnc server can make use of the generic framework. Points for discussion: - Is a generic task offloading framework the way to go for subsystems such as virtio-9p, which would like to emulate the AIO behaviour that allows us to free the vcpu thread to handle any other guest requests. - Currently the AIO helper threads indicate the completion of the task to the IO-thread by sending a SIGUSR2, the handler for which does a write() to the file descriptor on which the IO thread is waiting using a select. Should we use this signal-handling mechanism to communicate between the generic asynchronous helper threads and the IO-Thread ? > If we have a lack of agenda items I'll cancel the week's call. > > thanks, > -chris > -- Thanks and Regards gautham