From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael =?UTF-8?B?QsO8c2No?= Subject: Re: KVM with PCI forwarding really slow after 4.1 Date: Wed, 16 Dec 2015 18:55:28 +0100 Message-ID: <20151216185528.75edf799@wiggum> References: <20151201180915.53692097@wiggum> <565DDD47.1080104@redhat.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; boundary="Sig_/4Vt_9QycPNjfAMYrT/3Mp16"; protocol="application/pgp-signature" Cc: kvm@vger.kernel.org To: Paolo Bonzini Return-path: Received: from bues.ch ([80.190.117.144]:35267 "EHLO bues.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933002AbbLPRzt (ORCPT ); Wed, 16 Dec 2015 12:55:49 -0500 In-Reply-To: <565DDD47.1080104@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: --Sig_/4Vt_9QycPNjfAMYrT/3Mp16 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Tue, 1 Dec 2015 18:47:51 +0100 Paolo Bonzini wrote: > On 01/12/2015 18:09, Michael B=C3=BCsch wrote: > > I use "-device pci-assign,host=3D00:1a.0" to forward a USB host chip > > to a Win7 32 bit inside of qemu/kvm. That used to work pretty well, > > but it broke horribly somewhere after 4.1. With recent kernels the > > virtual machine boots, but is _very_ slow. It takes hours to boot.=20 > > If PCI forwarding is disabled, everything is fine. =20 >=20 > This has been reported already, I'm going to look at it this week. Are there any news regarding this issue? --=20 Michael --Sig_/4Vt_9QycPNjfAMYrT/3Mp16 Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJWcaWQAAoJEPUyvh2QjYsOE5gQAMCqRJFYhr9WhpnrD+oT3ojG pX7sAOY3KWlrWYA8lF6x2pLzMtWGrtIZRgL4aKSeytFFduk1R/n/QtzvWbpukuYO dz+KsuEy9uQ4GluhcXAqFTT4MxmX6O0K4G3LGwNs0JYodpWdfC8/TurKaQ3VoG5+ GDdiUaHOcI1hwZxId3RDe86LsW+wxVQFq2FCD4CBZYZr2oofQdbrsPCvRAbzPQRD u9GsVSVygnsBZodn5rnDAfg27WSJwZrQn0FKTDUr6ggW258NLFnL3hDTMiRENhfe Sl1Umx47dv4tGBRGal1NTJ/BxMQdYZS6qjUTltgBiM4f/puJcl6MoGu0yEMbxfS/ nsrIkZ6ZbuauoMv2kEPJHqCBzSDB5PfdRDZpbkgQXVyfnSY2/w5I1uZGCDPnc+/D RipjPaui14raSqQJ4UwH/DL5PX56O99fmAB+RRfZdnCPA/NV0CNjrUzi97SdCSh3 X0lFoc04khhuEXinvv3MY/2nM7N+5F/uiUN05X6R+cegX62ZwmmkgyUNf/JxKySx rDo+HGmThITTYiCozm2A7Zpfj/VER/hry5oLxSAzQziNJdRL1HlQ0Wn5mPdgFvZ8 /Xe5i/1K+fZFhhl08uF9Mg2kC61awa8M0Hkx19EEQiLXTgNEEZR/zEjIGtHZsUo+ r4l2WcbJ7WCx74flKRKx =QKLN -----END PGP SIGNATURE----- --Sig_/4Vt_9QycPNjfAMYrT/3Mp16--