From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: Nested paging in nested SVM setup Date: Tue, 02 Sep 2014 11:45:18 +0200 Message-ID: <540591AE.6030204@redhat.com> References: <53A179C4.9060203@gmail.com> <53A18A6D.2050407@siemens.com> <53F44440.6070408@gmail.com> <5404A70E.20207@redhat.com> <54055F22.8070700@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit To: Valentine Sinitsyn , Jan Kiszka , kvm@vger.kernel.org Return-path: Received: from mail-we0-f181.google.com ([74.125.82.181]:51765 "EHLO mail-we0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750722AbaIBJpW (ORCPT ); Tue, 2 Sep 2014 05:45:22 -0400 Received: by mail-we0-f181.google.com with SMTP id x48so6708576wes.12 for ; Tue, 02 Sep 2014 02:45:21 -0700 (PDT) In-Reply-To: <54055F22.8070700@gmail.com> Sender: kvm-owner@vger.kernel.org List-ID: Il 02/09/2014 08:09, Valentine Sinitsyn ha scritto: > > https://www.dropbox.com/s/slbxmxyg74wh9hv/l1mmio-cpu0.txt.gz?dl=0 > > It was taken with kernel 3.16.1 modules with your paging-tmpl.h patch > applied. > > This time, the trace looks somewhat different, however my code still > hangs in nested KVM (and doesn't on real HW). This *is* different though. I don't see any kvm_inj_exception at all (with my patch it should be for vector 0xfe). In any case, the problem seems specific to _writes_ to the APIC page. I'm going to write a testcase for that and see if I can reproduce it now. Paolo