kvm lock on fedora-16

[ 3066.660818] =================================
[ 3066.661270] [ INFO: inconsistent lock state ]
[ 3066.661499] 3.1.2-1.fc16.x86_64.debug #1
[ 3066.661731] ---------------------------------
[ 3066.661958] inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-W} usage.
[ 3066.662190] qemu-kvm/5599 [HC0[0]:SC0[0]:HE1:SE1] takes:
[ 3066.662416]  (pcpu_alloc_mutex){+.+.?.}, at: [<ffffffff8110e19e>] pcpu_alloc+0x6f/0x835
[ 3066.662883] {RECLAIM_FS-ON-W} state was registered at:
[ 3066.663109]   [<ffffffff8108f2ae>] mark_held_locks+0x6d/0x95
[ 3066.663342]   [<ffffffff8108f8bd>] lockdep_trace_alloc+0x9f/0xc2
[ 3066.663571]   [<ffffffff8112efd8>] slab_pre_alloc_hook+0x1e/0x54
[ 3066.663808]   [<ffffffff811314fb>] __kmalloc+0x64/0x10c
[ 3066.664044]   [<ffffffff8110d7a8>] pcpu_mem_alloc+0x5e/0x67
[ 3066.664275]   [<ffffffff8110da49>] pcpu_extend_area_map+0x2b/0xd4
[ 3066.664512]   [<ffffffff8110e2ed>] pcpu_alloc+0x1be/0x835
[ 3066.664750]   [<ffffffff8110e974>] __alloc_percpu+0x10/0x12
[ 3066.664987]   [<ffffffff81132e7c>] kmem_cache_open+0x2cc/0x2d6
[ 3066.665220]   [<ffffffff8113305f>] kmem_cache_create+0x1d9/0x281
[ 3066.665456]   [<ffffffff81298845>] acpi_os_create_cache+0x1d/0x2d
[ 3066.665702]   [<ffffffff812c0c0a>] acpi_ut_create_caches+0x26/0xb0
[ 3066.665940]   [<ffffffff812c35b6>] acpi_ut_init_globals+0xe/0x244
[ 3066.666177]   [<ffffffff81d82b36>] acpi_initialize_subsystem+0x35/0xae
[ 3066.666417]   [<ffffffff81d8184f>] acpi_early_init+0x5c/0xf7
[ 3066.666657]   [<ffffffff81d51ba1>] start_kernel+0x3ce/0x3ea
[ 3066.666896]   [<ffffffff81d512c4>] x86_64_start_reservations+0xaf/0xb3
[ 3066.667131]   [<ffffffff81d513ca>] x86_64_start_kernel+0x102/0x111
[ 3066.667365] irq event stamp: 36158871
[ 3066.667587] hardirqs last  enabled at (36158871): [<ffffffff814fe860>] __slab_alloc+0x407/0x428
[ 3066.668049] hardirqs last disabled at (36158870): [<ffffffff814fe4a1>] __slab_alloc+0x48/0x428
[ 3066.668501] softirqs last  enabled at (36158618): [<ffffffff81062ab8>] __do_softirq+0x200/0x25a
[ 3066.668964] softirqs last disabled at (36158613): [<ffffffff8150f0fc>] call_softirq+0x1c/0x30
[ 3066.669422]
[ 3066.669423] other info that might help us debug this:
[ 3066.669873]  Possible unsafe locking scenario:
[ 3066.669874]
[ 3066.670310]        CPU0
[ 3066.670531]        ----
[ 3066.670755]   lock(pcpu_alloc_mutex);
[ 3066.670991]   <Interrupt>
[ 3066.671210]     lock(pcpu_alloc_mutex);
[ 3066.671439]
[ 3066.671439]  *** DEADLOCK ***
[ 3066.671440]
[ 3066.672094] 3 locks held by qemu-kvm/5599:
[ 3066.672322]  #0:  (&vcpu->mutex){+.+.+.}, at: [<ffffffffa005d96d>] vcpu_load+0x1d/0x90 [kvm]
[ 3066.672799]  #1:  (&kvm->srcu){.+.+.+}, at: [<ffffffffa00674f2>] srcu_read_lock+0x0/0x49 [kvm]
[ 3066.673281]  #2:  (&mm->mmap_sem){++++++}, at: [<ffffffffa005ee63>] hva_to_pfn+0xbb/0x2d1 [kvm]
[ 3066.673751]
[ 3066.673752] stack backtrace:
[ 3066.674195] Pid: 5599, comm: qemu-kvm Not tainted 3.1.2-1.fc16.x86_64.debug #1
[ 3066.674639] Call Trace:
[ 3066.674866]  [<ffffffff814fbb73>] print_usage_bug+0x1e7/0x1f8
[ 3066.675099]  [<ffffffff8101a849>] ? save_stack_trace+0x2c/0x49
[ 3066.675333]  [<ffffffff8108d558>] ? print_irq_inversion_bug.part.18+0x1a0/0x1a0
[ 3066.675790]  [<ffffffff8108dc86>] mark_lock+0x106/0x220
[ 3066.676023]  [<ffffffff8108e142>] __lock_acquire+0x3a2/0xd0c
[ 3066.676258]  [<ffffffff8150606b>] ? _raw_spin_unlock+0x28/0x3b
[ 3066.676494]  [<ffffffff8110e19e>] ? pcpu_alloc+0x6f/0x835
[ 3066.676727]  [<ffffffff8108efaf>] lock_acquire+0xf3/0x13e
[ 3066.676965]  [<ffffffff8110e19e>] ? pcpu_alloc+0x6f/0x835
[ 3066.677197]  [<ffffffff81240407>] ? kzalloc_node+0x14/0x16
[ 3066.677424]  [<ffffffff8110e19e>] ? pcpu_alloc+0x6f/0x835
[ 3066.677652]  [<ffffffff81504375>] __mutex_lock_common+0x5d/0x39a
[ 3066.677883]  [<ffffffff8110e19e>] ? pcpu_alloc+0x6f/0x835
[ 3066.678111]  [<ffffffff8108f3f7>] ? trace_hardirqs_on_caller+0x121/0x158
[ 3066.678344]  [<ffffffff814fe86c>] ? __slab_alloc+0x413/0x428
[ 3066.678574]  [<ffffffff815047c1>] mutex_lock_nested+0x40/0x45
[ 3066.678805]  [<ffffffff8110e19e>] pcpu_alloc+0x6f/0x835
[ 3066.679037]  [<ffffffff8125497d>] ? random32+0x2d/0x33
[ 3066.679265]  [<ffffffff81260eb7>] ? should_fail+0x8d/0xeb
[ 3066.679493]  [<ffffffff8110e974>] __alloc_percpu+0x10/0x12
[ 3066.679726]  [<ffffffff8123ed53>] blkio_alloc_blkg_stats+0x1d/0x31
[ 3066.679963]  [<ffffffff81240443>] throtl_alloc_tg+0x3a/0xdf
[ 3066.680191]  [<ffffffff81240e5b>] blk_throtl_bio+0x154/0x39c
[ 3066.680420]  [<ffffffff810f50f9>] ? mempool_alloc_slab+0x15/0x17
[ 3066.680656]  [<ffffffff811328d3>] ? kmem_cache_alloc+0x53/0x13a
[ 3066.680887]  [<ffffffff812333c9>] generic_make_request+0x2e4/0x415
[ 3066.681116]  [<ffffffff81506027>] ? _raw_spin_unlock_irqrestore+0x45/0x61
[ 3066.681350]  [<ffffffff812335d8>] submit_bio+0xde/0xfd
[ 3066.681579]  [<ffffffff810fadae>] ? account_page_writeback+0x13/0x15
[ 3066.681813]  [<ffffffff810fb113>] ? test_set_page_writeback+0xeb/0xfd
[ 3066.682053]  [<ffffffff8111fa91>] swap_writepage+0x94/0x9f
[ 3066.682281]  [<ffffffff81105afd>] shmem_writepage+0x192/0x1d8
[ 3066.682510]  [<ffffffff81102f37>] shrink_page_list+0x402/0x79a
[ 3066.682743]  [<ffffffff811036d6>] shrink_inactive_list+0x22c/0x3d3
[ 3066.682981]  [<ffffffff8108f2ae>] ? mark_held_locks+0x6d/0x95
[ 3066.683214]  [<ffffffff81103f62>] shrink_zone+0x43f/0x582
[ 3066.683449]  [<ffffffff810f7678>] ? zone_watermark_ok+0x1f/0x21
[ 3066.683691]  [<ffffffff81104481>] do_try_to_free_pages+0x17a/0x397
[ 3066.683929]  [<ffffffff811049d5>] try_to_free_pages+0xd5/0x175
[ 3066.684160]  [<ffffffff810fa955>] __alloc_pages_nodemask+0x538/0x7f1
[ 3066.684396]  [<ffffffff810152af>] ? native_sched_clock+0x34/0x36
[ 3066.684636]  [<ffffffff810152ba>] ? sched_clock+0x9/0xd
[ 3066.684866]  [<ffffffff8112976d>] alloc_pages_vma+0xf5/0xfa
[ 3066.685097]  [<ffffffff8113831e>] do_huge_pmd_anonymous_page+0xb3/0x274
[ 3066.685330]  [<ffffffff8110f8bb>] ? pmd_offset+0x19/0x3f
[ 3066.685566]  [<ffffffff81112a9c>] handle_mm_fault+0xfd/0x1b8
[ 3066.685798]  [<ffffffff81112ee6>] __get_user_pages+0x2fa/0x465
[ 3066.686043]  [<ffffffffa005eda6>] get_user_page_nowait+0x37/0x39 [kvm]
[ 3066.686285]  [<ffffffffa005ee7e>] hva_to_pfn+0xd6/0x2d1 [kvm]
[ 3066.686527]  [<ffffffffa005cbdb>] ? kvm_memslots+0x57/0x8c [kvm]
[ 3066.686772]  [<ffffffffa005cd76>] ? gfn_to_memslot+0x13/0x44 [kvm]
[ 3066.687022]  [<ffffffffa005f0fc>] __gfn_to_pfn+0x83/0x8c [kvm]
[ 3066.687264]  [<ffffffffa005f1bd>] gfn_to_pfn_async+0x1a/0x1c [kvm]
[ 3066.687512]  [<ffffffffa00778ba>] try_async_pf+0x3f/0x248 [kvm]
[ 3066.687754]  [<ffffffffa005ed63>] ? kvm_host_page_size+0x83/0x8f [kvm]
[ 3066.688008]  [<ffffffffa007905c>] tdp_page_fault+0xe8/0x1a5 [kvm]
[ 3066.688256]  [<ffffffffa0077b9f>] kvm_mmu_page_fault+0x2b/0x83 [kvm]
[ 3066.688493]  [<ffffffffa00cbc12>] handle_ept_violation+0xe1/0xea [kvm_intel]
[ 3066.688734]  [<ffffffffa00d0075>] vmx_handle_exit+0x5ee/0x638 [kvm_intel]
[ 3066.688992]  [<ffffffffa0067531>] ? srcu_read_lock+0x3f/0x49 [kvm]
[ 3066.689239]  [<ffffffffa00674f2>] ? init_emulate_ctxt+0x131/0x131 [kvm]
[ 3066.689489]  [<ffffffffa0071475>] kvm_arch_vcpu_ioctl_run+0xb30/0xe00 [kvm]
[ 3066.689745]  [<ffffffffa006c944>] ? kvm_arch_vcpu_load+0x14d/0x158 [kvm]
[ 3066.689998]  [<ffffffffa005db43>] kvm_vcpu_ioctl+0x120/0x59c [kvm]
[ 3066.690236]  [<ffffffff8120557a>] ? file_has_perm+0xa7/0xc9
[ 3066.690470]  [<ffffffff8115194d>] do_vfs_ioctl+0x472/0x4b3
[ 3066.690703]  [<ffffffff811519e4>] sys_ioctl+0x56/0x7a
[ 3066.690940]  [<ffffffff8150ce02>] system_call_fastpath+0x16/0x1b