On 24/12/2014 12:02, Jamie Heilman wrote: > Running qemu-system-x86_64 -machine pc,accel=kvm -nodefaults works, > my real (headless) kvm guests work, but this new patch makes running > "qemu-system-x86_64 -machine pc,accel=kvm" fail again, this time with > errors in the host to the tune of: > > ------------[ cut here ]------------ > WARNING: CPU: 1 PID: 3901 at arch/x86/kvm/x86.c:6575 > kvm_arch_vcpu_ioctl_run+0xd63/0xe5b [kvm]() > Modules linked in: nfsv4 cpufreq_userspace cpufreq_stats cpufreq_powersave > cpufreq_ondemand cpufreq_conservative autofs4 fan nfsd auth_rpcgss nfs lockd > grace fscache sunrpc bridge stp llc vhost_net tun vhost macvtap macvlan fuse > cbc dm_crypt usb_storage snd_hda_codec_analog snd_hda_codec_generic kvm_intel > kvm tg3 ptp pps_core sr_mod snd_hda_intel snd_hda_controller snd_hda_codec > snd_hwdep snd_pcm snd_timer snd sg dcdbas cdrom psmouse soundcore floppy > evdev xfs dm_mod raid1 md_mod > CPU: 1 PID: 3901 Comm: qemu-system-x86 Not tainted > 3.19.0-rc1-00011-g53262d1-dirty #1 > Hardware name: Dell Inc. Precision WorkStation T3400 /0TP412, BIOS A14 > 04/30/2012 > 0000000000000000 000000007e052328 ffff8800c25ffcf8 ffffffff813defbe > 0000000000000000 0000000000000000 ffff8800c25ffd38 ffffffff8103b517 > ffff8800c25ffd28 ffffffffa019bdec ffff8800caf1d000 ffff8800c2774800 > Call Trace: > [<ffffffff813defbe>] dump_stack+0x4c/0x6e > [<ffffffff8103b517>] warn_slowpath_common+0x97/0xb1 > [<ffffffffa019bdec>] ? kvm_arch_vcpu_ioctl_run+0xd63/0xe5b [kvm] > [<ffffffff8103b60b>] warn_slowpath_null+0x15/0x17 > [<ffffffffa019bdec>] kvm_arch_vcpu_ioctl_run+0xd63/0xe5b [kvm] > [<ffffffffa02308b9>] ? vmcs_load+0x20/0x62 [kvm_intel] > [<ffffffffa0231e03>] ? vmx_vcpu_load+0x140/0x16a [kvm_intel] > [<ffffffffa0196ba3>] ? kvm_arch_vcpu_load+0x15c/0x161 [kvm] > [<ffffffffa018d8b1>] kvm_vcpu_ioctl+0x189/0x4bd [kvm] > [<ffffffff8104647a>] ? do_sigtimedwait+0x12f/0x189 > [<ffffffff810ea316>] do_vfs_ioctl+0x370/0x436 > [<ffffffff810f24f2>] ? __fget+0x67/0x72 > [<ffffffff810ea41b>] SyS_ioctl+0x3f/0x5e > [<ffffffff813e34d2>] system_call_fastpath+0x12/0x17 > ---[ end trace 46abac932fb3b4a1 ]--- > ------------[ cut here ]------------ > WARNING: CPU: 1 PID: 3901 at arch/x86/kvm/x86.c:6575 > kvm_arch_vcpu_ioctl_run+0xd63/0xe5b [kvm]() > Modules linked in: nfsv4 cpufreq_userspace cpufreq_stats cpufreq_powersave > cpufreq_ondemand cpufreq_conservative autofs4 fan nfsd auth_rpcgss nfs lockd > grace fscache sunrpc bridge stp llc vhost_net tun vhost macvtap macvlan fuse > cbc dm_crypt usb_storage snd_hda_codec_analog snd_hda_codec_generic kvm_intel > kvm tg3 ptp pps_core sr_mod snd_hda_intel snd_hda_controller snd_hda_codec > snd_hwdep snd_pcm snd_timer snd sg dcdbas cdrom psmouse soundcore floppy > evdev xfs dm_mod raid1 md_mod > CPU: 1 PID: 3901 Comm: qemu-system-x86 Tainted: G W > 3.19.0-rc1-00011-g53262d1-dirty #1 > Hardware name: Dell Inc. Precision WorkStation T3400 /0TP412, BIOS A14 > 04/30/2012 > 0000000000000000 000000007e052328 ffff8800c25ffcf8 ffffffff813defbe > 0000000000000000 0000000000000000 ffff8800c25ffd38 ffffffff8103b517 > ffff8800c25ffd28 ffffffffa019bdec ffff8800caf1d000 ffff8800c2774800 > Call Trace: > [<ffffffff813defbe>] dump_stack+0x4c/0x6e > [<ffffffff8103b517>] warn_slowpath_common+0x97/0xb1 > [<ffffffffa019bdec>] ? kvm_arch_vcpu_ioctl_run+0xd63/0xe5b [kvm] > [<ffffffff8103b60b>] warn_slowpath_null+0x15/0x17 > [<ffffffffa019bdec>] kvm_arch_vcpu_ioctl_run+0xd63/0xe5b [kvm] > [<ffffffffa02308b9>] ? vmcs_load+0x20/0x62 [kvm_intel] > [<ffffffffa0231e03>] ? vmx_vcpu_load+0x140/0x16a [kvm_intel] > [<ffffffffa0196ba3>] ? kvm_arch_vcpu_load+0x15c/0x161 [kvm] > [<ffffffffa018d8b1>] kvm_vcpu_ioctl+0x189/0x4bd [kvm] > [<ffffffff8104647a>] ? do_sigtimedwait+0x12f/0x189 > [<ffffffff810ea316>] do_vfs_ioctl+0x370/0x436 > [<ffffffff810f24f2>] ? __fget+0x67/0x72 > [<ffffffff810ea41b>] SyS_ioctl+0x3f/0x5e > [<ffffffff813e34d2>] system_call_fastpath+0x12/0x17 > ---[ end trace 46abac932fb3b4a2 ]--- > > over and over and over ad nauseum, or until I kill the qemu command, > it also eats a core's worth of cpu.
Yeah, I'm fairly sure that the second hunk of Tiejun's patch is not correct, but he's on the right track. I hope to post a fix today, else on the 27th or 29th. Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
