Re: [patch 0/3] Patches for KVM & RT

[Carsten Emde <Carsten.Emde@osadl.org>]

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Jan,

> Here are some patches that are necessary to get KVM running with the -rt4
> patchset.
Thanks a lot.

Unfortunaately, there is still a last one at kernel/smp.c:288
        /* Can deadlock when called with interrupts disabled */
        WARN_ON_ONCE(irqs_disabled() && !oops_in_progress);

Do we get another fix?

	Carsten.

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Apr  9 22:57:55 deliv1 kernel: ------------[ cut here ]------------
Apr  9 22:57:55 deliv1 kernel: WARNING: at kernel/smp.c:289 smp_call_function_single+0x5a/0x11c()
Apr  9 22:57:55 deliv1 kernel: Hardware name: SD37V10
Apr  9 22:57:55 deliv1 kernel: Modules linked in: tun fuse radeon drm nfsd lockd nfs_acl auth_rpcgss exportfs sco bridge stp bnep l2cap bluetooth coretemp it87 hwmon_vid hwmon sunrpc zd1211rw mac80211 cfg80211 ipt_MASQUERADE iptable_nat nf_nat ipt_REJECT ipt_LOG nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter ip_tables nf_conntrack_netbios_ns ip6t_REJECT xt_tcpudp nf_conntrack_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables x_tables ipv6 cpufreq_ondemand acpi_cpufreq dm_mirror dm_region_hash dm_log dm_multipath scsi_dh dm_mod kvm_intel kvm uinput snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_usb_audio snd_usb_lib snd_rawmidi snd_hwdep snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore iTCO_wdt i2c_i801 tg3 i82975x_edac ohci1394 snd_page_alloc iTCO_vendor_support i2c_core libphy edac_core ieee1394 auerswald sr_mod sg button cdrom pcspkr ata_generic pata_acpi ata_piix libata sd_mod scsi_mod raid456 async_xor async_memcpy async
Apr  9 22:57:55 deliv1 kernel: _tx xor raid1 ext3 jbd mbcache uhci_hcd ohci_hcd ehci_hcd [last unloaded: microcode]
Apr  9 22:57:55 deliv1 kernel: Pid: 4085, comm: qemu-kvm Not tainted 2.6.29.1-rt5-32bit #39
Apr  9 22:57:55 deliv1 kernel: Call Trace:
Apr  9 22:57:55 deliv1 kernel: [<c022e89e>] warn_slowpath+0x76/0xad
Apr  9 22:57:55 deliv1 kernel: [<c0227688>] ? sub_preempt_count+0x94/0xa3
Apr  9 22:57:55 deliv1 kernel: [<f8352622>] ? set_spte+0xe/0x5dd [kvm]
Apr  9 22:57:55 deliv1 kernel: [<c048757f>] ? __schedule+0x9b0/0x9f9
Apr  9 22:57:55 deliv1 kernel: [<f834a626>] ? unalias_gfn+0xe/0x54 [kvm]
Apr  9 22:57:55 deliv1 kernel: [<c026c4cc>] ? __rcu_read_unlock+0x6e/0x7d
Apr  9 22:57:55 deliv1 kernel: [<c022185b>] ? cpuacct_charge+0x52/0x58
Apr  9 22:57:55 deliv1 kernel: [<c0221f0b>] ? update_curr+0x136/0x177
Apr  9 22:57:55 deliv1 kernel: [<c0207f87>] ? sched_clock+0x44/0x64
Apr  9 22:57:55 deliv1 kernel: [<c026c4cc>] ? __rcu_read_unlock+0x6e/0x7d
Apr  9 22:57:55 deliv1 kernel: [<c022185b>] ? cpuacct_charge+0x52/0x58
Apr  9 22:57:55 deliv1 kernel: [<c024fc95>] smp_call_function_single+0x5a/0x11c
Apr  9 22:57:55 deliv1 kernel: [<f81cc72f>] ? __vcpu_clear+0x0/0xbc [kvm_intel]
Apr  9 22:57:55 deliv1 kernel: [<f81cf19d>] vmx_vcpu_load+0x46/0x191 [kvm_intel]
Apr  9 22:57:55 deliv1 kernel: [<c0489067>] ? __spin_unlock+0x14/0x28
Apr  9 22:57:55 deliv1 kernel: [<f834db41>] kvm_arch_vcpu_load+0x14/0x1e [kvm]
Apr  9 22:57:55 deliv1 kernel: [<f83481d7>] kvm_sched_in+0x10/0x12 [kvm]
Apr  9 22:57:55 deliv1 kernel: [<c02275a5>] finish_task_switch+0x97/0xe6
Apr  9 22:57:55 deliv1 kernel: [<c0487570>] __schedule+0x9a1/0x9f9
Apr  9 22:57:55 deliv1 kernel: [<c024430f>] ? hrtimer_interrupt+0x18a/0x192
Apr  9 22:57:55 deliv1 kernel: [<c0202c9d>] ? restore_nocheck_notrace+0x0/0xe
Apr  9 22:57:55 deliv1 kernel: [<f834e7c3>] ? kvm_arch_vcpu_ioctl_run+0x406/0x634 [kvm]
Apr  9 22:57:55 deliv1 kernel: [<c048774f>] ? preempt_schedule+0x3e/0x67
Apr  9 22:57:55 deliv1 kernel: [<c048775e>] preempt_schedule+0x4d/0x67
Apr  9 22:57:55 deliv1 kernel: [<f834e7c3>] kvm_arch_vcpu_ioctl_run+0x406/0x634 [kvm]
Apr  9 22:57:55 deliv1 kernel: [<f834740d>] kvm_vcpu_ioctl+0xf4/0x659 [kvm]
Apr  9 22:57:55 deliv1 kernel: [<c048757f>] ? __schedule+0x9b0/0x9f9
Apr  9 22:57:55 deliv1 kernel: [<c024b232>] ? tick_dev_program_event+0x2d/0x9a
Apr  9 22:57:55 deliv1 kernel: [<f8347319>] ? kvm_vcpu_ioctl+0x0/0x659 [kvm]
Apr  9 22:57:55 deliv1 kernel: [<c02b8a8d>] vfs_ioctl+0x27/0x6e
Apr  9 22:57:55 deliv1 kernel: [<c02b9038>] do_vfs_ioctl+0x49b/0x4d4
Apr  9 22:57:55 deliv1 kernel: [<c0335058>] ? trace_hardirqs_on_thunk+0xc/0x10
Apr  9 22:57:55 deliv1 kernel: [<c02ae507>] ? fget_light+0x85/0x9a
Apr  9 22:57:55 deliv1 kernel: [<c02b90b6>] sys_ioctl+0x45/0x5f
Apr  9 22:57:55 deliv1 kernel: [<c0202b88>] sysenter_do_call+0x12/0x27
Apr  9 22:57:55 deliv1 kernel: ---[ end trace ea071060aeca7fc5 ]---