From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1HfvLw-00013D-IQ for qemu-devel@nongnu.org; Mon, 23 Apr 2007 06:01:00 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1HfvLv-00012o-HT for qemu-devel@nongnu.org; Mon, 23 Apr 2007 06:01:00 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1HfvLu-00012Y-Vw for qemu-devel@nongnu.org; Mon, 23 Apr 2007 06:00:59 -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 1HfvGW-0002Cl-IB for qemu-devel@nongnu.org; Mon, 23 Apr 2007 05:55:24 -0400 Received: from list by ciao.gmane.org with local (Exim 4.43) id 1Hfv0P-0005of-HS for qemu-devel@nongnu.org; Mon, 23 Apr 2007 11:38:45 +0200 Received: from 87.218.10.57 ([87.218.10.57]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 23 Apr 2007 11:38:45 +0200 Received: from rss by 87.218.10.57 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 23 Apr 2007 11:38:45 +0200 From: =?UTF-8?B?UmHDumwgU8OhbmNoZXogU2lsZXM=?= Date: Mon, 23 Apr 2007 11:19:57 +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 Raúl Sánchez Siles wrote: > 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. > I'm still interested in this, I would appreciate some comment about the issue. Thanks. -- Raúl Sánchez Siles