From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1HaqeO-0005lJ-Qe for qemu-devel@nongnu.org; Mon, 09 Apr 2007 05:59:04 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1HaqeO-0005l6-43 for qemu-devel@nongnu.org; Mon, 09 Apr 2007 05:59:04 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1HaqeN-0005l3-TU for qemu-devel@nongnu.org; Mon, 09 Apr 2007 05:59:03 -0400 Received: from main.gmane.org ([80.91.229.2] helo=ciao.gmane.org) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1HaqaZ-0002fu-1G for qemu-devel@nongnu.org; Mon, 09 Apr 2007 05:55:07 -0400 Received: from root by ciao.gmane.org with local (Exim 4.43) id 1HaqaU-0002Nw-EN for qemu-devel@nongnu.org; Mon, 09 Apr 2007 11:55:02 +0200 Received: from 87.218.10.102 ([87.218.10.102]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 09 Apr 2007 11:55:02 +0200 Received: from rss by 87.218.10.102 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 09 Apr 2007 11:55:02 +0200 From: =?UTF-8?B?UmHDumwgU8OhbmNoZXogU2lsZXM=?= Date: Mon, 09 Apr 2007 11:46:09 +0200 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8Bit Sender: news Subject: [Qemu-devel] Re: USB problem in QEMU Reply-To: rss@barracuda.es, qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Yu, Xiaoyang wrote: > > > The USB problem I met is that using some kind of USB disks will cause > guest OS run extremely slow, while these disks can work properly in host > OS. It looks like the USB simulation in QEMU is not fully featured, and > can not handle some error conditions properly. > I've also noticed this, I thought it was a multiconfiguration problem, but even applying the patch suggested sometime ago here, I could noticed the slowness. For this I guess the configuration is linux host and windows guest as is my case. Slowness started once I issued usb_add on the qemu console and after finding the emulated system unusable slowness stopped on usb_del on qemu console again. I think the problem may be the qemu lacks some usb feature, maybe not implemented yet. But I would be glad of hear what qemu people has to say about this. Thanks. -- Raúl Sánchez Siles