From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: __unlazy_fpu with Sandy Bridge? Date: Tue, 26 Apr 2011 22:58:24 -0400 Message-ID: <20110427025824.GA29394@dumpdata.com> References: <20110427015758.GA32418@dumpdata.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20110427015758.GA32418@dumpdata.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On Tue, Apr 26, 2011 at 09:57:58PM -0400, Konrad Rzeszutek Wilk wrote: > I bought over the weekend a Sandy Bridge machine and quite often > when I launch a guest I get this: Which disappear if I do 'xsave=0'. Looks like there is still some lingering bug? (I did build it with the patch that Keir posted). > > [ 1.519320] modprobe used greatest stack depth: 6348 bytes left > [ 1.528966] udevd (1158): /proc/1158/oom_adj is deprecated, please use /proc/1158/oom_score_adj instead. > > [ 1.610819] BUG: unable to handle kernel paging request at cb5b007f > [ 1.610839] IP: [] __unlazy_fpu+0x20/0x84 > [ 1.610854] *pdpt = 000000000b49f027 *pde = 000000000c0b1067 *pte = 800000000b5b0061 > [ 1.610874] Oops: 0003 [#1] SMP > [ 1.610886] last sysfs file: /sys/devices/virtual/tty/ptyp9/uevent > [ 1.610896] Modules linked in: xen_blkfront xen_netfront xen_fbfront fb_sys_fops sysimgblt sysfillrect syscopyarea xen_kbdfront xenfs > [ 1.610934] > [ 1.610941] Pid: 1424, comm: ifup Not tainted 2.6.39-rc4yes_xen_blkdev-00489-gfa5424e #1 > [ 1.610959] EIP: 0061:[] EFLAGS: 00010086 CPU: 1 > [ 1.610969] EIP is at __unlazy_fpu+0x20/0x84 > [ 1.610977] EAX: ffffffff EBX: ead8c4e0 ECX: cb602700 EDX: ffffffff > [ 1.610987] ESI: eb3d3180 EDI: cb5afd40 EBP: cb60de60 ESP: cb60de5c > [ 1.610997] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0069 > [ 1.611007] Process ifup (pid: 1424, ti=cb60c000 task=cb602700 task.ti=cb5c8000) > [ 1.611017] Stack: > [ 1.611023] cb602700 cb60de88 c102b938 ead8c4e0 eb3d5480 0060224c 00000001 eb3d5480 > [ 1.611055] cb4adc00 eb3d5480 ead8c4e0 cb5c9f50 c13d45ce cb60df1c 00000282 5fb55ce4 > [ 1.611055] 00000000 c15e7480 ead8c4e0 c15e7480 c15e7480 ead8c758 cb60df1c c15e7480 > [ 1.611055] Call Trace: > [ 1.611055] [] __switch_to+0x40/0xfa > [ 1.611055] [] schedule+0x5fb/0x667 > [ 1.611055] [] ? xen_restore_fl_direct_reloc+0x4/0x4 > [ 1.611055] [] ? free_hot_cold_page+0xf8/0x100 > [ 1.611055] [] ? get_phys_to_machine+0x18/0x4c > [ 1.611055] [] ? xen_force_evtchn_callback+0xf/0x14 > [ 1.611055] [] ? check_events+0x8/0xc > [ 1.611055] [] ? xen_restore_fl_direct_reloc+0x4/0x4 > [ 1.611055] [] ? _raw_spin_unlock_irqrestore+0x14/0x17 > [ 1.611055] [] ? add_wait_queue+0x30/0x35 > [ 1.611055] [] ? do_wait+0x183/0x1e1 > [ 1.611055] [] ? sys_wait4+0x88/0xa1 > [ 1.611055] [] ? wait_noreap_copyout+0xdf/0xdf > [ 1.611055] [] ? sys_waitpid+0x13/0x15 > [ 1.611055] [] ? sysenter_do_call+0x12/0x28 > [ 1.611055] Code: 31 ff 5a 89 f8 59 5b 5e 5f 5d c3 55 89 c1 89 e5 57 8b 40 04 f6 40 0c 01 74 6b b0 01 84 c0 74 1f 83 c8 ff 8b b9 38 03 00 00 89 c2 <0f> ae 37 8b 81 38 03 00 00 f6 80 00 02 00 00 01 75 18 eb 2e b0 > [ 1.611055] EIP: [] __unlazy_fpu+0x20/0x84 SS:ESP 0069:cb60de5c > [ 1.611055] CR2: 00000000cb5b007f > [ 1.611055] ---[ end trace 0e00f93ab96a1012 ]--- > [ 1.611055] Fixing recursive fault but reboot is needed! > > > Has anybody seen something similar to this? > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel