From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?B?VG9yYWxmIEbDtnJzdGVy?= Subject: Re: 3.13 hangs when I tried to start a KVM at a 32 bit stable Gentoo Date: Mon, 24 Feb 2014 21:39:05 +0100 Message-ID: <530BADE9.9020101@gmx.de> References: <52DEA270.60803@gmx.de> <52E165B7.6020506@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: kernel@gentoo.org, kvm@vger.kernel.org, Gleb Natapov , Paolo Bonzini To: Dave Hansen , Linux Kernel Return-path: In-Reply-To: <52E165B7.6020506@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 01/23/2014 07:55 PM, Dave Hansen wrote: > On 01/21/2014 08:38 AM, Toralf F=C3=B6rster wrote: >> Jan 21 17:18:57 n22 kernel: INFO: rcu_sched self-detected stall on C= PU { 2} (t=3D60001 jiffies g=3D18494 c=3D18493 q=3D183951) >> Jan 21 17:18:57 n22 kernel: sending NMI to all CPUs: >> Jan 21 17:18:57 n22 kernel: NMI backtrace for cpu 2 >> Jan 21 17:18:57 n22 kernel: CPU: 2 PID: 6779 Comm: qemu-system-x86 N= ot tainted 3.13.0 #3 >> Jan 21 17:18:57 n22 kernel: Hardware name: LENOVO 4180F65/4180F65, B= IOS 83ET75WW (1.45 ) 05/10/2013 >> Jan 21 17:18:57 n22 kernel: task: e921c370 ti: e5f36000 task.ti: e5f= 36000 >=20 > I'm seeing a very similar hang with an ubuntu guest and a custom kern= el. > I'm on commit 0dc3fd0249a, and it's 100% reproducible every time I r= un KVM. >=20 > Cc-ing a few more folks... >=20 I tried to bisect it - the first attempt to bisetc it between v3.12. an= d v3.13 blamed this commit : commit 37bf06375c90a42fe07b9bebdb07bc316ae5a0ce Merge: 6bfa687 d0e639c Author: Ingo Molnar Date: Wed Oct 9 12:36:13 2013 +0200 Merge tag 'v3.12-rc4' into sched/core Merge Linux v3.12-rc4 to fix a conflict and also to refresh the tre= e before applying more scheduler patches. Conflicts: arch/avr32/include/asm/Kbuild Signed-off-by: Ingo Molnar which seems rather to be the upper limit where to search for the first = bad commit, or ? - --=20 MfG/Sincerely Toralf F=C3=B6rster pgp finger print:1A37 6F99 4A9D 026F 13E2 4DCF C4EA CDDE 0076 E94E -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iF4EAREIAAYFAlMLregACgkQxOrN3gB26U7P7gD/Wage68loQ++oP4moD94kTNpn goyT7fvssm3jyF+2HagA/0EIR5MOcl7xlBPNw5JKqcI0pPx0yBytUljtz+KTPS/Y =3DP8vB -----END PGP SIGNATURE-----