On Tue, 27 Jul 2010 14:56:50 PDT, akpm@xxxxxxxxxxxxxxxxxxxx said: > The mm-of-the-moment snapshot 2010-07-27-14-56 has been uploaded to > > http://userweb.kernel.org/~akpm/mmotm/ Hit this while the X server was on its way down during a 'shutdown -r now'. Worked fine in -rc5-mmotm0719. 'e16' is the Enlightenment window manager, if that matters. [ 93.181787] [drm:output_poll_execute] *ERROR* delayed enqueue failed 1 [ 99.802836] [drm] nouveau 0000:01:00.0: Allocating FIFO number 4 [ 99.808875] [drm] nouveau 0000:01:00.0: nouveau_channel_alloc: initialised FIFO 4 [ 103.262226] [drm:output_poll_execute] *ERROR* delayed enqueue failed 1 [ 113.341948] [drm:output_poll_execute] *ERROR* delayed enqueue failed 1 [ 123.421836] [drm:output_poll_execute] *ERROR* delayed enqueue failed 1 [ 123.550520] [drm] nouveau 0000:01:00.0: nouveau_channel_free: freeing fifo 4 [ 123.551253] [ 123.551253] ====================================================== [ 123.551253] [ INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected ] [ 123.551253] 2.6.35-rc6-mmotm0727 #1 [ 123.551253] ------------------------------------------------------ [ 123.551253] e16/3822 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: [ 123.551253] (&(&mm->unused_lock)->rlock){+.+...}, at: [<ffffffff812a94bc>] drm_mm_put_block+0x10e/0x142 [ 123.551253] [ 123.551253] and this task is already holding: [ 123.551253] (&(&dev_priv->context_switch_lock)->rlock){-.....}, at: [<ffffffff812bdbab>] nouveau_channel_free+0x10f/0x233 [ 123.551253] which would create a new lock dependency: [ 123.551253] (&(&dev_priv->context_switch_lock)->rlock){-.....} -> (&(&mm->unused_lock)->rlock){+.+...} [ 123.551253] [ 123.551253] but this new dependency connects a HARDIRQ-irq-safe lock: [ 123.551253] (&(&dev_priv->context_switch_lock)->rlock){-.....} [ 123.551253] ... which became HARDIRQ-irq-safe at: [ 123.551253] [<ffffffff81065043>] __lock_acquire+0x301/0xd6a [ 123.551253] [<ffffffff81065fca>] lock_acquire+0x10a/0x130 [ 123.551253] [<ffffffff81594dda>] _raw_spin_lock_irqsave+0x44/0x57 [ 123.551253] [<ffffffff812c264b>] nouveau_irq_handler+0x63/0x1920 [ 123.551253] [<ffffffff810817bb>] handle_IRQ_event+0xad/0x213 [ 123.551253] [<ffffffff81083bd2>] handle_fasteoi_irq+0xd1/0x115 [ 123.551253] [<ffffffff81004b6e>] handle_irq+0x122/0x133 [ 123.551253] [<ffffffff8100499f>] do_IRQ+0x57/0xaf [ 123.551253] [ 123.604031] [drm] nouveau 0000:01:00.0: GPU lockup - switching to software fbcon [ 123.604031] [<ffffffff81595cd3>] ret_from_intr+0x0/0xf [ 123.604031] [<ffffffff81000c73>] cpu_idle+0x85/0x169 [ 123.604031] [<ffffffff81b62061>] start_secondary+0x1b1/0x1b5 [ 123.604031] [ 123.604031] to a HARDIRQ-irq-unsafe lock: [ 123.604031] (&(&mm->unused_lock)->rlock){+.+...} [ 123.604031] ... which became HARDIRQ-irq-unsafe at: [ 123.604031] ... [<ffffffff810650c4>] __lock_acquire+0x382/0xd6a [ 123.604031] [<ffffffff81065fca>] lock_acquire+0x10a/0x130 [ 123.604031] [<ffffffff81594ce1>] _raw_spin_lock+0x36/0x45 [ 123.604031] [<ffffffff812a9669>] drm_mm_pre_get+0x24/0xb2 [ 123.604031] [<ffffffff812b748b>] ttm_bo_init+0x1fe/0x3c0 [ 123.604031] [<ffffffff812c5dce>] nouveau_bo_new+0x3ae/0x423 [ 123.604031] [<ffffffff812bf2c8>] nouveau_mem_init+0x293/0x487 [ 123.604031] [<ffffffff812bce55>] nouveau_card_init+0xa5e/0xd52 [ 123.604031] [<ffffffff812bd675>] nouveau_load+0x519/0x528 [ 123.604031] [<ffffffff812a74af>] drm_get_pci_dev+0x174/0x26a [ 123.604031] [<ffffffff8158a14e>] nouveau_pci_probe+0x10/0x12 [ 123.604031] [<ffffffff812228ce>] local_pci_probe+0x3f/0x70 [ 123.604031] [<ffffffff81222c4c>] pci_device_probe+0x65/0x96 [ 123.604031] [<ffffffff8130a840>] driver_probe_device+0xe8/0x182 [ 123.604031] [<ffffffff8130a924>] __driver_attach+0x4a/0x6b [ 123.604031] [<ffffffff81309a2f>] bus_for_each_dev+0x57/0x83 [ 123.604031] [<ffffffff8130a505>] driver_attach+0x19/0x1b [ 123.604031] [<ffffffff8130a147>] bus_add_driver+0xae/0x205 [ 123.604031] [<ffffffff8130ab80>] driver_register+0xb5/0x122 [ 123.604031] [<ffffffff81222e82>] __pci_register_driver+0x61/0xcd [ 123.604031] [<ffffffff812a7839>] drm_pci_init+0x31/0x98 [ 123.604031] [<ffffffff812a003f>] drm_init+0x5d/0x61 [ 123.604031] [<ffffffff81b4e59a>] nouveau_init+0x48/0x4a [ 123.604031] [<ffffffff810002ff>] do_one_initcall+0x7a/0x12f [ 123.604031] [<ffffffff81b2ccae>] kernel_init+0x138/0x1c2 [ 123.604031] [<ffffffff81003554>] kernel_thread_helper+0x4/0x10 [ 123.604031] [ 123.604031] other info that might help us debug this: [ 123.604031] [ 123.604031] 1 lock held by e16/3822: [ 123.604031] #0: (&(&dev_priv->context_switch_lock)->rlock){-.....}, at: [<ffffffff812bdbab>] nouveau_channel_free+0x10f/0x233 [ 123.604031] [ 123.604031] the dependencies between HARDIRQ-irq-safe lock and the holding lock: [ 123.604031] -> (&(&dev_priv->context_switch_lock)->rlock){-.....} ops: 15 { [ 123.604031] IN-HARDIRQ-W at: [ 123.604031] [<ffffffff81065043>] __lock_acquire+0x301/0xd6a [ 123.604031] [<ffffffff81065fca>] lock_acquire+0x10a/0x130 [ 123.604031] [<ffffffff81594dda>] _raw_spin_lock_irqsave+0x44/0x57 [ 123.604031] [<ffffffff812c264b>] nouveau_irq_handler+0x63/0x1920 [ 123.604031] [<ffffffff810817bb>] handle_IRQ_event+0xad/0x213 [ 123.604031] [<ffffffff81083bd2>] handle_fasteoi_irq+0xd1/0x115 [ 123.604031] [<ffffffff81004b6e>] handle_irq+0x122/0x133 [ 123.604031] [<ffffffff8100499f>] do_IRQ+0x57/0xaf [ 123.604031] [<ffffffff81595cd3>] ret_from_intr+0x0/0xf [ 123.604031] [<ffffffff81000c73>] cpu_idle+0x85/0x169 [ 123.604031] [<ffffffff81b62061>] start_secondary+0x1b1/0x1b5 [ 123.604031] INITIAL USE at: [ 123.604031] [<ffffffff81065145>] __lock_acquire+0x403/0xd6a [ 123.604031] [<ffffffff81065fca>] lock_acquire+0x10a/0x130 [ 123.604031] [<ffffffff81594dda>] _raw_spin_lock_irqsave+0x44/0x57 [ 123.604031] [<ffffffff812c264b>] nouveau_irq_handler+0x63/0x1920 [ 123.604031] [<ffffffff810817bb>] handle_IRQ_event+0xad/0x213 [ 123.604031] [<ffffffff81083bd2>] handle_fasteoi_irq+0xd1/0x115 [ 123.604031] [<ffffffff81004b6e>] handle_irq+0x122/0x133 [ 123.604031] [<ffffffff8100499f>] do_IRQ+0x57/0xaf [ 123.604031] [<ffffffff81595cd3>] ret_from_intr+0x0/0xf [ 123.604031] [<ffffffff81000c73>] cpu_idle+0x85/0x169 [ 123.604031] [<ffffffff81b62061>] start_secondary+0x1b1/0x1b5 [ 123.604031] } [ 123.604031] ... key at: [<ffffffff8243b758>] __key.32520+0x0/0x8 [ 123.604031] ... acquired at: [ 123.604031] [<ffffffff810648cd>] check_irq_usage+0x42/0x89 [ 123.604031] [<ffffffff810657d6>] __lock_acquire+0xa94/0xd6a [ 123.604031] [<ffffffff81065fca>] lock_acquire+0x10a/0x130 [ 123.604031] [<ffffffff81594ce1>] _raw_spin_lock+0x36/0x45 [ 123.604031] [<ffffffff812a94bc>] drm_mm_put_block+0x10e/0x142 [ 123.604031] [<ffffffff812bf7e2>] nouveau_gpuobj_del+0x14c/0x179 [ 123.604031] [<ffffffff812c02ad>] nouveau_gpuobj_ref_del+0x25d/0x284 [ 123.604031] [<ffffffff812e3fb2>] nv50_graph_destroy_context+0xd0/0xdc [ 123.604031] [<ffffffff812bdbdd>] nouveau_channel_free+0x141/0x233 [ 123.604031] [<ffffffff812be5bf>] nouveau_ioctl_fifo_free+0x79/0x86 [ 123.604031] [<ffffffff8129fdab>] drm_ioctl+0x2b3/0x36b [ 123.604031] [<ffffffff810ec6fc>] vfs_ioctl+0x31/0xa2 [ 123.604031] [<ffffffff810ed07b>] do_vfs_ioctl+0x496/0x4c9 [ 123.604031] [<ffffffff810ed105>] sys_ioctl+0x57/0x96 [ 123.604031] [<ffffffff8100272b>] system_call_fastpath+0x16/0x1b [ 123.604031] [ 123.604031] [ 123.604031] the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: [ 123.604031] -> (&(&mm->unused_lock)->rlock){+.+...} ops: 10338 { [ 123.604031] HARDIRQ-ON-W at: [ 123.604031] [<ffffffff810650c4>] __lock_acquire+0x382/0xd6a [ 123.604031] [<ffffffff81065fca>] lock_acquire+0x10a/0x130 [ 123.604031] [<ffffffff81594ce1>] _raw_spin_lock+0x36/0x45 [ 123.604031] [<ffffffff812a9669>] drm_mm_pre_get+0x24/0xb2 [ 123.604031] [<ffffffff812b748b>] ttm_bo_init+0x1fe/0x3c0 [ 123.604031] [<ffffffff812c5dce>] nouveau_bo_new+0x3ae/0x423 [ 123.604031] [<ffffffff812bf2c8>] nouveau_mem_init+0x293/0x487 [ 123.604031] [<ffffffff812bce55>] nouveau_card_init+0xa5e/0xd52 [ 123.604031] [<ffffffff812bd675>] nouveau_load+0x519/0x528 [ 123.604031] [<ffffffff812a74af>] drm_get_pci_dev+0x174/0x26a [ 123.604031] [<ffffffff8158a14e>] nouveau_pci_probe+0x10/0x12 [ 123.604031] [<ffffffff812228ce>] local_pci_probe+0x3f/0x70 [ 123.604031] [<ffffffff81222c4c>] pci_device_probe+0x65/0x96 [ 123.604031] [<ffffffff8130a840>] driver_probe_device+0xe8/0x182 [ 123.604031] [<ffffffff8130a924>] __driver_attach+0x4a/0x6b [ 123.604031] [<ffffffff81309a2f>] bus_for_each_dev+0x57/0x83 [ 123.604031] [<ffffffff8130a505>] driver_attach+0x19/0x1b [ 123.604031] [<ffffffff8130a147>] bus_add_driver+0xae/0x205 [ 123.604031] [<ffffffff8130ab80>] driver_register+0xb5/0x122 [ 123.604031] [<ffffffff81222e82>] __pci_register_driver+0x61/0xcd [ 123.604031] [<ffffffff812a7839>] drm_pci_init+0x31/0x98 [ 123.604031] [<ffffffff812a003f>] drm_init+0x5d/0x61 [ 123.604031] [<ffffffff81b4e59a>] nouveau_init+0x48/0x4a [ 123.604031] [<ffffffff810002ff>] do_one_initcall+0x7a/0x12f [ 123.604031] [<ffffffff81b2ccae>] kernel_init+0x138/0x1c2 [ 123.604031] [<ffffffff81003554>] kernel_thread_helper+0x4/0x10 [ 123.604031] SOFTIRQ-ON-W at: [ 123.604031] [<ffffffff810650e5>] __lock_acquire+0x3a3/0xd6a [ 123.604031] [<ffffffff81065fca>] lock_acquire+0x10a/0x130 [ 123.604031] [<ffffffff81594ce1>] _raw_spin_lock+0x36/0x45 [ 123.604031] [<ffffffff812a9669>] drm_mm_pre_get+0x24/0xb2 [ 123.604031] [<ffffffff812b748b>] ttm_bo_init+0x1fe/0x3c0 [ 123.604031] [<ffffffff812c5dce>] nouveau_bo_new+0x3ae/0x423 [ 123.604031] [<ffffffff812bf2c8>] nouveau_mem_init+0x293/0x487 [ 123.604031] [<ffffffff812bce55>] nouveau_card_init+0xa5e/0xd52 [ 123.604031] [<ffffffff812bd675>] nouveau_load+0x519/0x528 [ 123.604031] [<ffffffff812a74af>] drm_get_pci_dev+0x174/0x26a [ 123.604031] [<ffffffff8158a14e>] nouveau_pci_probe+0x10/0x12 [ 123.604031] [<ffffffff812228ce>] local_pci_probe+0x3f/0x70 [ 123.604031] [<ffffffff81222c4c>] pci_device_probe+0x65/0x96 [ 123.604031] [<ffffffff8130a840>] driver_probe_device+0xe8/0x182 [ 123.604031] [<ffffffff8130a924>] __driver_attach+0x4a/0x6b [ 123.604031] [<ffffffff81309a2f>] bus_for_each_dev+0x57/0x83 [ 123.604031] [<ffffffff8130a505>] driver_attach+0x19/0x1b [ 123.604031] [<ffffffff8130a147>] bus_add_driver+0xae/0x205 [ 123.604031] [<ffffffff8130ab80>] driver_register+0xb5/0x122 [ 123.604031] [<ffffffff81222e82>] __pci_register_driver+0x61/0xcd [ 123.604031] [<ffffffff812a7839>] drm_pci_init+0x31/0x98 [ 123.604031] [<ffffffff812a003f>] drm_init+0x5d/0x61 [ 123.604031] [<ffffffff81b4e59a>] nouveau_init+0x48/0x4a [ 123.604031] [<ffffffff810002ff>] do_one_initcall+0x7a/0x12f [ 123.604031] [<ffffffff81b2ccae>] kernel_init+0x138/0x1c2 [ 123.604031] [<ffffffff81003554>] kernel_thread_helper+0x4/0x10 [ 123.604031] INITIAL USE at: [ 123.604031] [<ffffffff81065145>] __lock_acquire+0x403/0xd6a [ 123.604031] [<ffffffff81065fca>] lock_acquire+0x10a/0x130 [ 123.604031] [<ffffffff81594ce1>] _raw_spin_lock+0x36/0x45 [ 123.604031] [<ffffffff812a9669>] drm_mm_pre_get+0x24/0xb2 [ 123.604031] [<ffffffff812b748b>] ttm_bo_init+0x1fe/0x3c0 [ 123.604031] [<ffffffff812c5dce>] nouveau_bo_new+0x3ae/0x423 [ 123.604031] [<ffffffff812bf2c8>] nouveau_mem_init+0x293/0x487 [ 123.604031] [<ffffffff812bce55>] nouveau_card_init+0xa5e/0xd52 [ 123.604031] [<ffffffff812bd675>] nouveau_load+0x519/0x528 [ 123.604031] [<ffffffff812a74af>] drm_get_pci_dev+0x174/0x26a [ 123.604031] [<ffffffff8158a14e>] nouveau_pci_probe+0x10/0x12 [ 123.604031] [<ffffffff812228ce>] local_pci_probe+0x3f/0x70 [ 123.604031] [<ffffffff81222c4c>] pci_device_probe+0x65/0x96 [ 123.604031] [<ffffffff8130a840>] driver_probe_device+0xe8/0x182 [ 123.604031] [<ffffffff8130a924>] __driver_attach+0x4a/0x6b [ 123.604031] [<ffffffff81309a2f>] bus_for_each_dev+0x57/0x83 [ 123.604031] [<ffffffff8130a505>] driver_attach+0x19/0x1b [ 123.604031] [<ffffffff8130a147>] bus_add_driver+0xae/0x205 [ 123.604031] [<ffffffff8130ab80>] driver_register+0xb5/0x122 [ 123.604031] [<ffffffff81222e82>] __pci_register_driver+0x61/0xcd [ 123.604031] [<ffffffff812a7839>] drm_pci_init+0x31/0x98 [ 123.604031] [<ffffffff812a003f>] drm_init+0x5d/0x61 [ 123.604031] [<ffffffff81b4e59a>] nouveau_init+0x48/0x4a [ 123.604031] [<ffffffff810002ff>] do_one_initcall+0x7a/0x12f [ 123.604031] [<ffffffff81b2ccae>] kernel_init+0x138/0x1c2 [ 123.604031] [<ffffffff81003554>] kernel_thread_helper+0x4/0x10 [ 123.604031] } [ 123.604031] ... key at: [<ffffffff8243b408>] __key.30042+0x0/0x8 [ 123.604031] ... acquired at: [ 123.604031] [<ffffffff810648cd>] check_irq_usage+0x42/0x89 [ 123.604031] [<ffffffff810657d6>] __lock_acquire+0xa94/0xd6a [ 123.604031] [<ffffffff81065fca>] lock_acquire+0x10a/0x130 [ 123.604031] [<ffffffff81594ce1>] _raw_spin_lock+0x36/0x45 [ 123.604031] [<ffffffff812a94bc>] drm_mm_put_block+0x10e/0x142 [ 123.604031] [<ffffffff812bf7e2>] nouveau_gpuobj_del+0x14c/0x179 [ 123.604031] [<ffffffff812c02ad>] nouveau_gpuobj_ref_del+0x25d/0x284 [ 123.604031] [<ffffffff812e3fb2>] nv50_graph_destroy_context+0xd0/0xdc [ 123.604031] [<ffffffff812bdbdd>] nouveau_channel_free+0x141/0x233 [ 123.604031] [<ffffffff812be5bf>] nouveau_ioctl_fifo_free+0x79/0x86 [ 123.604031] [<ffffffff8129fdab>] drm_ioctl+0x2b3/0x36b [ 123.604031] [<ffffffff810ec6fc>] vfs_ioctl+0x31/0xa2 [ 123.604031] [<ffffffff810ed07b>] do_vfs_ioctl+0x496/0x4c9 [ 123.604031] [<ffffffff810ed105>] sys_ioctl+0x57/0x96 [ 123.604031] [<ffffffff8100272b>] system_call_fastpath+0x16/0x1b [ 123.604031] [ 123.604031] [ 123.604031] stack backtrace: [ 123.604031] Pid: 3822, comm: e16 Tainted: G W 2.6.35-rc6-mmotm0727 #1 [ 123.604031] Call Trace: [ 123.604031] [<ffffffff81064876>] check_usage+0x351/0x366 [ 123.604031] [<ffffffff8106313b>] ? register_lock_class+0x1e/0x2c7 [ 123.604031] [<ffffffff810648cd>] check_irq_usage+0x42/0x89 [ 123.604031] [<ffffffff810657d6>] __lock_acquire+0xa94/0xd6a [ 123.604031] [<ffffffff810652ba>] ? __lock_acquire+0x578/0xd6a [ 123.604031] [<ffffffff812a94bc>] ? drm_mm_put_block+0x10e/0x142 [ 123.604031] [<ffffffff81065fca>] lock_acquire+0x10a/0x130 [ 123.604031] [<ffffffff812a94bc>] ? drm_mm_put_block+0x10e/0x142 [ 123.604031] [<ffffffff81594ce1>] _raw_spin_lock+0x36/0x45 [ 123.604031] [<ffffffff812a94bc>] ? drm_mm_put_block+0x10e/0x142 [ 123.604031] [<ffffffff812a94bc>] drm_mm_put_block+0x10e/0x142 [ 123.604031] [<ffffffff812bf7e2>] nouveau_gpuobj_del+0x14c/0x179 [ 123.604031] [<ffffffff812c02ad>] nouveau_gpuobj_ref_del+0x25d/0x284 [ 123.604031] [<ffffffff812e3fb2>] nv50_graph_destroy_context+0xd0/0xdc [ 123.604031] [<ffffffff812bdbdd>] nouveau_channel_free+0x141/0x233 [ 123.604031] [<ffffffff8109a0f9>] ? trace_preempt_off+0x15/0x28 [ 123.604031] [<ffffffff8129fd9c>] ? drm_ioctl+0x2a4/0x36b [ 123.604031] [<ffffffff812be5bf>] nouveau_ioctl_fifo_free+0x79/0x86 [ 123.604031] [<ffffffff8129fdab>] drm_ioctl+0x2b3/0x36b [ 123.604031] [<ffffffff812be546>] ? nouveau_ioctl_fifo_free+0x0/0x86 [ 123.604031] [<ffffffff81064b97>] ? mark_lock+0x2d/0x1d8 [ 123.604031] [<ffffffff810ec6fc>] vfs_ioctl+0x31/0xa2 [ 123.604031] [<ffffffff810ed07b>] do_vfs_ioctl+0x496/0x4c9 [ 123.604031] [<ffffffff810ed105>] sys_ioctl+0x57/0x96 [ 123.604031] [<ffffffff8100272b>] system_call_fastpath+0x16/0x1b
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