Attachment 122637 Details for Bug 94759 – dmesg from I-G-T run

dmesg from I-G-T run

dmesg.txt (text/plain), 7.76 KB, created by Joonas Lahtinen on 2016-03-30 11:07:55 UTC

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Creator: Joonas Lahtinen

Created: 2016-03-30 11:07:55 UTC

Size: 7.76 KB

patch

obsolete

>[  149.921578] ======================================================
>[  149.921640] [ INFO: possible circular locking dependency detected ]
>[  149.921703] 4.5.0-gfxbench+ #1 Not tainted
>[  149.921745] -------------------------------------------------------
>[  149.921807] gem_exec_basic/5896 is trying to acquire lock:
>[  149.921861]  (&dev->struct_mutex){+.+.+.}, at: [<ffffffff81514ea1>] drm_gem_mmap+0x1a1/0x270
>[  149.921969] 
>but task is already holding lock:
>[  149.922027]  (&mm->mmap_sem){++++++}, at: [<ffffffff8117d8c4>] vm_mmap_pgoff+0x44/0xa0
>[  149.922125] 
>which lock already depends on the new lock.
>
>[  149.922202] 
>the existing dependency chain (in reverse order) is:
>[  149.922275] 
>-> #3 (&mm->mmap_sem){++++++}:
>[  149.922335]        [<ffffffff810cd7e1>] lock_acquire+0xb1/0x200
>[  149.922400]        [<ffffffff8118e575>] __might_fault+0x75/0xa0
>[  149.922465]        [<ffffffff8125114a>] kernfs_fop_write+0x8a/0x180
>[  149.922533]        [<ffffffff811d3ce3>] __vfs_write+0x23/0xe0
>[  149.922595]        [<ffffffff811d4a44>] vfs_write+0xa4/0x190
>[  149.922656]        [<ffffffff811d58e4>] SyS_write+0x44/0xb0
>[  149.922716]        [<ffffffff817c605b>] entry_SYSCALL_64_fastpath+0x16/0x73
>[  149.922792] 
>-> #2 (s_active#6){++++.+}:
>[  149.922855]        [<ffffffff810cd7e1>] lock_acquire+0xb1/0x200
>[  149.922918]        [<ffffffff8124f770>] __kernfs_remove+0x210/0x2f0
>[  149.922985]        [<ffffffff81250740>] kernfs_remove_by_name_ns+0x40/0xa0
>[  149.923056]        [<ffffffff812520e0>] sysfs_remove_file_ns+0x10/0x20
>[  149.923125]        [<ffffffff81539304>] device_del+0x124/0x250
>[  149.923189]        [<ffffffff81539449>] device_unregister+0x19/0x60
>[  149.923255]        [<ffffffff81543b71>] cpu_cache_sysfs_exit+0x51/0xb0
>[  149.923325]        [<ffffffff81544148>] cacheinfo_cpu_callback+0x38/0x70
>[  149.923396]        [<ffffffff8109ba09>] notifier_call_chain+0x39/0xa0
>[  149.923464]        [<ffffffff8109ba79>] __raw_notifier_call_chain+0x9/0x10
>[  149.923536]        [<ffffffff81078e3e>] cpu_notify+0x1e/0x40
>[  149.923598]        [<ffffffff81078ed9>] cpu_notify_nofail+0x9/0x20
>[  149.923663]        [<ffffffff81079223>] _cpu_down+0x233/0x340
>[  149.923724]        [<ffffffff81079763>] disable_nonboot_cpus+0xb3/0x3b0
>[  149.923794]        [<ffffffff810d3f74>] suspend_devices_and_enter+0x5b4/0xc50
>[  149.923869]        [<ffffffff810d4b41>] pm_suspend+0x531/0x9f0
>[  149.923932]        [<ffffffff810d2c57>] state_store+0x77/0xe0
>[  149.923993]        [<ffffffff8140109f>] kobj_attr_store+0xf/0x20
>[  149.924058]        [<ffffffff81251e40>] sysfs_kf_write+0x40/0x50
>[  149.924123]        [<ffffffff812511fc>] kernfs_fop_write+0x13c/0x180
>[  149.924190]        [<ffffffff811d3ce3>] __vfs_write+0x23/0xe0
>[  149.924251]        [<ffffffff811d4a44>] vfs_write+0xa4/0x190
>[  149.924311]        [<ffffffff811d58e4>] SyS_write+0x44/0xb0
>[  149.924371]        [<ffffffff817c605b>] entry_SYSCALL_64_fastpath+0x16/0x73
>[  149.924445] 
>-> #1 (cpu_hotplug.lock){+.+.+.}:
>[  149.924506]        [<ffffffff810cd7e1>] lock_acquire+0xb1/0x200
>[  149.924569]        [<ffffffff817c1782>] mutex_lock_nested+0x62/0x3b0
>[  149.924637]        [<ffffffff81078c21>] get_online_cpus+0x61/0x80
>[  149.924702]        [<ffffffff81118d0b>] stop_machine+0x1b/0xe0
>[  149.924765]        [<ffffffffa0139a3d>] gen8_ggtt_insert_entries__BKL+0x2d/0x30 [i915]
>[  149.924892]        [<ffffffffa013dfd6>] ggtt_bind_vma+0x46/0x70 [i915]
>[  149.924994]        [<ffffffffa013f8cf>] i915_vma_bind+0xef/0x270 [i915]
>[  149.925096]        [<ffffffffa01473f1>] i915_gem_object_do_pin+0x881/0xb10 [i915]
>[  149.925207]        [<ffffffffa01476a8>] i915_gem_object_pin+0x28/0x30 [i915]
>[  149.925314]        [<ffffffffa015b51e>] intel_init_pipe_control+0xbe/0x210 [i915]
>[  149.925426]        [<ffffffffa01584c2>] intel_logical_rings_init+0xe2/0xde0 [i915]
>[  149.925538]        [<ffffffffa0148173>] i915_gem_init+0xf3/0x130 [i915]
>[  149.927846]        [<ffffffffa01cdef9>] i915_driver_load+0xd59/0x1980 [i915]
>[  149.930167]        [<ffffffff815199b4>] drm_dev_register+0xa4/0xb0
>[  149.932457]        [<ffffffff8151bbce>] drm_get_pci_dev+0xce/0x1e0
>[  149.934749]        [<ffffffffa01072ff>] i915_pci_probe+0x2f/0x50 [i915]
>[  149.937054]        [<ffffffff81446657>] pci_device_probe+0x87/0xf0
>[  149.939318]        [<ffffffff8153d9b9>] driver_probe_device+0x229/0x450
>[  149.941574]        [<ffffffff8153dc63>] __driver_attach+0x83/0x90
>[  149.943812]        [<ffffffff8153b691>] bus_for_each_dev+0x61/0xa0
>[  149.946034]        [<ffffffff8153d2a9>] driver_attach+0x19/0x20
>[  149.948220]        [<ffffffff8153cd8f>] bus_add_driver+0x1ef/0x290
>[  149.950375]        [<ffffffff8153e98b>] driver_register+0x5b/0xe0
>[  149.952530]        [<ffffffff8144558b>] __pci_register_driver+0x5b/0x60
>[  149.954662]        [<ffffffff8151bdb6>] drm_pci_init+0xd6/0x100
>[  149.956764]        [<ffffffffa0269094>] 0xffffffffa0269094
>[  149.958859]        [<ffffffff810003de>] do_one_initcall+0xae/0x1d0
>[  149.960963]        [<ffffffff8115b415>] do_init_module+0x5b/0x1c6
>[  149.963086]        [<ffffffff81107d3a>] load_module+0x1c0a/0x24b0
>[  149.965199]        [<ffffffff811087ce>] SyS_finit_module+0x7e/0xa0
>[  149.967301]        [<ffffffff817c605b>] entry_SYSCALL_64_fastpath+0x16/0x73
>[  149.969422] 
>-> #0 (&dev->struct_mutex){+.+.+.}:
>[  149.973576]        [<ffffffff810ccdc9>] __lock_acquire+0x1fc9/0x20f0
>[  149.975714]        [<ffffffff810cd7e1>] lock_acquire+0xb1/0x200
>[  149.977847]        [<ffffffff81514ec7>] drm_gem_mmap+0x1c7/0x270
>[  149.979986]        [<ffffffff81199354>] mmap_region+0x334/0x580
>[  149.982139]        [<ffffffff81199904>] do_mmap+0x364/0x410
>[  149.984279]        [<ffffffff8117d8ed>] vm_mmap_pgoff+0x6d/0xa0
>[  149.986399]        [<ffffffff81197a34>] SyS_mmap_pgoff+0x184/0x220
>[  149.988525]        [<ffffffff8100a28d>] SyS_mmap+0x1d/0x20
>[  149.990621]        [<ffffffff817c605b>] entry_SYSCALL_64_fastpath+0x16/0x73
>[  149.992738] 
>other info that might help us debug this:
>
>[  149.998978] Chain exists of:
>  &dev->struct_mutex --> s_active#6 --> &mm->mmap_sem
>
>[  150.005253]  Possible unsafe locking scenario:
>
>[  150.009446]        CPU0                    CPU1
>[  150.011534]        ----                    ----
>[  150.013615]   lock(&mm->mmap_sem);
>[  150.015693]                                lock(s_active#6);
>[  150.017799]                                lock(&mm->mmap_sem);
>[  150.019887]   lock(&dev->struct_mutex);
>[  150.021960] 
> *** DEADLOCK ***
>
>[  150.028064] 1 lock held by gem_exec_basic/5896:
>[  150.030115]  #0:  (&mm->mmap_sem){++++++}, at: [<ffffffff8117d8c4>] vm_mmap_pgoff+0x44/0xa0
>[  150.032260] 
>stack backtrace:
>[  150.036460] CPU: 1 PID: 5896 Comm: gem_exec_basic Not tainted 4.5.0-gfxbench+ #1
>[  150.038627] Hardware name:                  /NUC5CPYB, BIOS PYBSWCEL.86A.0040.2015.0814.1353 08/14/2015
>[  150.040837]  0000000000000000 ffff8800785f7bf0 ffffffff813fef15 ffffffff825fdaf0
>[  150.043093]  ffffffff825c3fe0 ffff8800785f7c30 ffffffff810c941c ffff8800785f7c90
>[  150.045327]  ffff880178a02da8 ffff880178a02580 0000000000000001 ffff880178a02dd0
>[  150.047571] Call Trace:
>[  150.049780]  [<ffffffff813fef15>] dump_stack+0x67/0x92
>[  150.052022]  [<ffffffff810c941c>] print_circular_bug+0x1fc/0x310
>[  150.054260]  [<ffffffff810ccdc9>] __lock_acquire+0x1fc9/0x20f0
>[  150.056487]  [<ffffffff810cd7e1>] lock_acquire+0xb1/0x200
>[  150.058713]  [<ffffffff81514ea1>] ? drm_gem_mmap+0x1a1/0x270
>[  150.060933]  [<ffffffff81514ec7>] drm_gem_mmap+0x1c7/0x270
>[  150.063153]  [<ffffffff81514ea1>] ? drm_gem_mmap+0x1a1/0x270
>[  150.065363]  [<ffffffff81199354>] mmap_region+0x334/0x580
>[  150.067566]  [<ffffffff81199904>] do_mmap+0x364/0x410
>[  150.069749]  [<ffffffff8117d8ed>] vm_mmap_pgoff+0x6d/0xa0
>[  150.071928]  [<ffffffff81197a34>] SyS_mmap_pgoff+0x184/0x220
>[  150.074102]  [<ffffffff8100a28d>] SyS_mmap+0x1d/0x20
>[  150.076270]  [<ffffffff817c605b>] entry_SYSCALL_64_fastpath+0x16/0x73

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