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([2001:b07:6468:f312:80e8:806f:a5f9:88dc]) by smtp.gmail.com with ESMTPSA id c17sm19979917wrp.28.2020.04.06.01.13.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 06 Apr 2020 01:13:02 -0700 (PDT) Subject: Re: ata driver loading hang on qemu/kvm intel To: Suresh Gumpula , "kvm@vger.kernel.org" , "linux-kernel@vger.kernel.org" References: <7C92AFF4-D479-4F80-8BED-6E9B226DFB72@nutanix.com> From: Paolo Bonzini Message-ID: <56486177-b629-081e-2785-b6e2ca626e88@redhat.com> Date: Mon, 6 Apr 2020 10:13:03 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <7C92AFF4-D479-4F80-8BED-6E9B226DFB72@nutanix.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/04/20 01:36, Suresh Gumpula wrote: > Hi, > > I am seeing this old problem with qemu 2.12/kernel 4.19.84(intel kvm > with nesting enabled) and guest kernel 4.10 > > https://bugzilla.redhat.com/show_bug.cgi?id=1345964 > > Could you please advise me on this?  I am seeing the exact same problem > where the ata driver load was stuck. > > Really appreciate if you could give some pointers? > > Is it a known issue with nesting? Or is this bug fixed in latest kvm module? Hi, that bug was specific to running under Ravello, not on bare metal. I have not received any other reports. To clarify you have: - QEMU 2.12 and kernel 4.19.x on the host - kernel 4.10.x on the guest What QEMU version is running in the guest and what kernel version in the nested guest? Paolo