From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:52112) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RubAb-0004si-Vn for qemu-devel@nongnu.org; Mon, 06 Feb 2012 21:52:38 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RubAa-0007SW-4k for qemu-devel@nongnu.org; Mon, 06 Feb 2012 21:52:37 -0500 Received: from e28smtp05.in.ibm.com ([122.248.162.5]:34765) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RubAZ-0007RJ-A9 for qemu-devel@nongnu.org; Mon, 06 Feb 2012 21:52:36 -0500 Received: from /spool/local by e28smtp05.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 7 Feb 2012 08:22:30 +0530 Received: from d28av04.in.ibm.com (d28av04.in.ibm.com [9.184.220.66]) by d28relay02.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q172qQmh3530904 for ; Tue, 7 Feb 2012 08:22:27 +0530 Received: from d28av04.in.ibm.com (loopback [127.0.0.1]) by d28av04.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q172qQ6q021928 for ; Tue, 7 Feb 2012 13:52:26 +1100 Received: from localhost ([9.123.247.48]) by d28av04.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id q172qP1G021908 for ; Tue, 7 Feb 2012 13:52:26 +1100 Date: Tue, 7 Feb 2012 10:52:25 +0800 From: Richard Yang Message-ID: <20120207025225.GB8210@richard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Subject: [Qemu-devel] Would this introduce a competition? Reply-To: Richard Yang List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org All I am reading the code ohci_frame_boundary() and found it will get a copy of the HCCA and process the interrupt ED list and then put it back. I am afraid, during this processing period, the kernel driver(hcd) will add other request to the interrupt ED list. So after qemu put the HCCA back, the new request will be overwriten? BTW, how can I specify qemu to use ohci on x86 platform? -- Richard Yang Help you, Help me