From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Kiszka Subject: Re: [patch 1/2] KVM: x86: handle double and triple faults for every exception Date: Sun, 15 Nov 2009 15:29:05 +0100 Message-ID: <4B001031.60508@web.de> References: <20091111192947.348198723@localhost.localdomain> <20091111193837.115825934@localhost.localdomain> <20091112122659.GC7392@redhat.com> <4AFFF716.5000708@redhat.com> <20091115125146.GF7392@redhat.com> <4AFFFE1A.9090203@redhat.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigDCF4F2DF60BB94D680854A01" Cc: Gleb Natapov , Marcelo Tosatti , kvm@vger.kernel.org, jan.kiszka@siemens.com, joerg.roedel@amd.com To: Avi Kivity Return-path: Received: from fmmailgate02.web.de ([217.72.192.227]:59311 "EHLO fmmailgate02.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752968AbZKOO3B (ORCPT ); Sun, 15 Nov 2009 09:29:01 -0500 In-Reply-To: <4AFFFE1A.9090203@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigDCF4F2DF60BB94D680854A01 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Avi Kivity wrote: > On 11/15/2009 02:51 PM, Gleb Natapov wrote: >> >>> "replacing" exceptions is dangerous in the case of debug exceptions >>> and machine checks, since restarting execution won't recover them. >>> >>> =20 >> But not replacing them is not better. No point in re-injecting >> exception that causes another exception. >> =20 >=20 > Right, just pointing out there's still a small hole left. Replacing is= > much better ignoring. Is the hardware doing some queuing in this case? Would it be overly complicated to adopt the real behavior here? Jan --------------enigDCF4F2DF60BB94D680854A01 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iEYEARECAAYFAksAEDEACgkQitSsb3rl5xQOTwCgoH23UYIi42DzxftBm9DSSuHR Z1oAoKK4S/Q4fizRX7zUdzf1oJq817i1 =7vYG -----END PGP SIGNATURE----- --------------enigDCF4F2DF60BB94D680854A01--