From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45028) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XP80J-0005c6-Ft for qemu-devel@nongnu.org; Wed, 03 Sep 2014 06:41:37 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XP80D-00013N-77 for qemu-devel@nongnu.org; Wed, 03 Sep 2014 06:41:31 -0400 Received: from mail-we0-x22e.google.com ([2a00:1450:400c:c03::22e]:39917) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XP80C-00013I-Vo for qemu-devel@nongnu.org; Wed, 03 Sep 2014 06:41:25 -0400 Received: by mail-we0-f174.google.com with SMTP id u57so8318552wes.5 for ; Wed, 03 Sep 2014 03:41:24 -0700 (PDT) Date: Wed, 3 Sep 2014 11:41:21 +0100 From: Stefan Hajnoczi Message-ID: <20140903104121.GF28095@stefanha-thinkpad.redhat.com> References: <5405C24D.4000304@ilande.co.uk> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Y/WcH0a6A93yCHGr" Content-Disposition: inline In-Reply-To: <5405C24D.4000304@ilande.co.uk> Subject: Re: [Qemu-devel] qemu-system-sparc64 hang (possibly virtio related?) with 2.1 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Mark Cave-Ayland Cc: Waldemar Brodkorb , qemu-devel --Y/WcH0a6A93yCHGr Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Sep 02, 2014 at 02:12:45PM +0100, Mark Cave-Ayland wrote: > Fortunately I can reproduce the issue with a debug-enabled build of > qemu-system-sparc64, and I've posted a backtrace obtained during the hung > state at http://www.ilande.co.uk/tmp/sparc64-gdb-bt.txt. I can't see > anything too obvious, other than that the ppoll() could possibly be waiting > for a bad file descriptor? The backtrace looks like a normal QEMU run. Nothing obvious there. This suggests the QEMU monitor is still operational and the guest is still executing code. Does the I/O time out inside the guest? Normally messages are printed in dmesg if I/O requests are pending for too long. Stefan --Y/WcH0a6A93yCHGr Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAEBAgAGBQJUBvBRAAoJEJykq7OBq3PIkZMH/0fVvCH6NJd3LddWFLgPtXRO EZLAClfDdw3t0VDfyI8L4wM7BFh6Qk4KagPrt27m4Mcx8YnrcMbLsYtQSb2cQKwg lCNnFXZaEQroBKdV6Ktp0DR1hmJ/SFgafRqmWF2VHy19sSjCC9lRw8Bi/aDvn6A+ tkpaTUh22w7r6uz9wojU0uUdkuTc3X0HcMSXJRLl+IeyPC33fcB3IFAR8bDgRxZT JEHYbg9UxtHmA7KnHNo57hpMIA6ij+yECwOiLX8EOtrMigLgfNAt6uvzUDzNmdew dQ8Y4WEtAXQX8b7bIr0zYhX8PfOCIjMu6dlp64LoVTSWVSVATGiL22UBuXllmoY= =F+lD -----END PGP SIGNATURE----- --Y/WcH0a6A93yCHGr--