On Tue, 2018-01-16 at 12:25 +0100, Thomas Gleixner wrote: > On Tue, 16 Jan 2018, Ming Lei wrote: > > > On Mon, Jan 15, 2018 at 09:40:36AM -0800, Christoph Hellwig wrote: > > > On Tue, Jan 16, 2018 at 12:03:43AM +0800, Ming Lei wrote: > > > > Hi, > > > > > > > > These two patches fixes IO hang issue reported by Laurence. > > > > > > > > 84676c1f21 ("genirq/affinity: assign vectors to all possible > > > > CPUs") > > > > may cause one irq vector assigned to all offline CPUs, then > > > > this vector > > > > can't handle irq any more. > > > > > > Well, that very much was the intention of managed > > > interrupts. Why > > > does the device raise an interrupt for a queue that has no online > > > cpu assigned to it? > > > > It is because of irq_create_affinity_masks(). > > That still does not answer the question. If the interrupt for a queue > is > assigned to an offline CPU, then the queue should not be used and > never > raise an interrupt. That's how managed interrupts have been designed. > > Thanks, > > tglx > > > > I captured a full boot log for this issue for Microsemi, I will send it to Don Brace. I enabled all the HPSA debug and here is snippet [ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-4.15.0- rc4.noming+ root=/dev/mapper/rhel_ibclient-root ro crashkernel=512M@64M rd.lvm.lv=rhel_ibclient/root rd.lvm.lv=rhel_ibclient/swap log_buf_len=54M console=ttyS1,115200n8 scsi_mod.use_blk_mq=y dm_mod.use_blk_mq=y [ 0.000000] Memory: 7834908K/1002852K available (8397K kernel code, 3012K rwdata, 3660K rodata, 2184K init, 15344K bss, 2356808K reserved, 0K cma-reserved) [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=32, Nodes=2 [ 0.000000] ftrace: allocating 33084 entries in 130 pages [ 0.000000] Running RCU self tests [ 0.000000] Hierarchical RCU implementation. [ 0.000000] RCU lockdep checking is enabled. [ 0.000000] RCU restricting CPUs from NR_CPUS=8192 to nr_cpu_ids=32. [ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=32 [ 0.000000] NR_IRQS: 524544, nr_irqs: 1088, preallocated irqs: 16 .. .. 0.190147] smp: Brought up 2 nodes, 16 CPUs [ 0.192006] smpboot: Max logical packages: 4 [ 0.193007] smpboot: Total of 16 processors activated (76776.33 BogoMIPS) [ 0.940640] node 0 initialised, 10803218 pages in 743ms [ 1.005449] node 1 initialised, 11812066 pages in 807ms .. .. [ 7.440896] hpsa 0000:05:00.0: can't disable ASPM; OS doesn't have ASPM control [ 7.442071] hpsa 0000:05:00.0: Logical aborts not supported [ 7.442075] hpsa 0000:05:00.0: HP SSD Smart Path aborts not supported [ 7.442164] hpsa 0000:05:00.0: Controller Configuration information [ 7.442167] hpsa 0000:05:00.0: ------------------------------------ [ 7.442173] hpsa 0000:05:00.0: Signature = CISS [ 7.442177] hpsa 0000:05:00.0: Spec Number = 3 [ 7.442182] hpsa 0000:05:00.0: Transport methods supported = 0x7a000007 [ 7.442186] hpsa 0000:05:00.0: Transport methods active = 0x3 [ 7.442190] hpsa 0000:05:00.0: Requested transport Method = 0x2 [ 7.442194] hpsa 0000:05:00.0: Coalesce Interrupt Delay = 0x0 [ 7.442198] hpsa 0000:05:00.0: Coalesce Interrupt Count = 0x1 [ 7.442202] hpsa 0000:05:00.0: Max outstanding commands = 1024 [ 7.442206] hpsa 0000:05:00.0: Bus Types = 0x200000 [ 7.442220] hpsa 0000:05:00.0: Server Name = 2M21220149 [ 7.442224] hpsa 0000:05:00.0: Heartbeat Counter = 0xd23 [ 7.442224] [ 7.442224] .. .. 246.751135] INFO: task systemd-udevd:413 blocked for more than 120 seconds. [ 246.788008] Tainted: G I 4.15.0-rc4.noming+ #1 [ 246.822380] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 246.865594] systemd-udevd D 0 413 411 0x80000004 [ 246.895519] Call Trace: [ 246.909713] ? __schedule+0x340/0xc20 [ 246.930236] schedule+0x32/0x80 [ 246.947905] schedule_timeout+0x23d/0x450 [ 246.970047] ? find_held_lock+0x2d/0x90 [ 246.991774] ? wait_for_completion_io+0x108/0x170 [ 247.018172] io_schedule_timeout+0x19/0x40 [ 247.041208] wait_for_completion_io+0x110/0x170 [ 247.067326] ? wake_up_q+0x70/0x70 [ 247.086801] hpsa_scsi_do_simple_cmd+0xc6/0x100 [hpsa] [ 247.114315] hpsa_scsi_do_simple_cmd_with_retry+0xb7/0x1c0 [hpsa] [ 247.146629] hpsa_scsi_do_inquiry+0x73/0xd0 [hpsa] [ 247.174118] hpsa_init_one+0x12cb/0x1a59 [hpsa] [ 247.199851] ? __pm_runtime_resume+0x55/0x70 [ 247.224527] local_pci_probe+0x3f/0xa0 [ 247.246034] pci_device_probe+0x146/0x1b0 [ 247.268413] driver_probe_device+0x2b3/0x4a0 [ 247.291868] __driver_attach+0xda/0xe0 [ 247.313370] ? driver_probe_device+0x4a0/0x4a0 [ 247.338399] bus_for_each_dev+0x6a/0xb0 [ 247.359912] bus_add_driver+0x41/0x260 [ 247.380244] driver_register+0x5b/0xd0 [ 247.400811] ? 0xffffffffc016b000 [ 247.418819] hpsa_init+0x38/0x1000 [hpsa] [ 247.440763] ? 0xffffffffc016b000 [ 247.459451] do_one_initcall+0x4d/0x19c [ 247.480539] ? do_init_module+0x22/0x220 [ 247.502575] ? rcu_read_lock_sched_held+0x64/0x70 [ 247.529549] ? kmem_cache_alloc_trace+0x1f7/0x260 [ 247.556204] ? do_init_module+0x22/0x220 [ 247.578633] do_init_module+0x5a/0x220 [ 247.600322] load_module+0x21e8/0x2a50 [ 247.621648] ? __symbol_put+0x60/0x60 [ 247.642796] SYSC_finit_module+0x94/0xe0 [ 247.665336] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 247.691751] RIP: 0033:0x7fc63d6527f9 [ 247.712308] RSP: 002b:00007ffdf1659ba8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 [ 247.755272] RAX: ffffffffffffffda RBX: 0000556b524c5f70 RCX: 00007fc63d6527f9 [ 247.795779] RDX: 0000000000000000 RSI: 00007fc63df6f099 RDI: 0000000000000008 [ 247.836413] RBP: 00007fc63df6f099 R08: 0000000000000000 R09: 0000556b524be760 [ 247.876395] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 [ 247.917597] R13: 0000556b524c5f10 R14: 0000000000020000 R15: 0000000000000000 [ 247.957272] [ 247.957272] Showing all locks held in the system: [ 247.992019] 1 lock held by khungtaskd/118: [ 248.015019] #0: (tasklist_lock){.+.+}, at: [<000000004ef3538d>] debug_show_all_locks+0x39/0x1b0 [ 248.064600] 2 locks held by systemd-udevd/413: [ 248.090031] #0: (&dev->mutex){....}, at: [<000000002a395ec8>] __driver_attach+0x4a/0xe0 [ 248.136620] #1: (&dev->mutex){....}, at: [<00000000d9def23c>] __driver_attach+0x58/0xe0 [ 248.183245] [ 248.191675] ============================================= [ 248.191675] [ 314.825134] dracut-initqueue[437]: Warning: dracut-initqueue timeout - starting timeout scripts [ 315.368421] dracut-initqueue[437]: Warning: dracut-initqueue timeout - starting timeout scripts [ 315.894373] dracut-initqueue[437]: Warning: dracut-initqueue timeout - starting timeout scripts [ 316.418385] dracut-initqueue[437]: Warning: dracut-initqueue timeout - starting timeout scripts [ 316.944461] dracut-initqueue[437]: Warning: dracut-initqueue timeout - starting timeout scripts [ 317.466708] dracut-initqueue[437]: Warning: dracut-initqueue timeout - starting timeout scripts [ 317.994380] dracut-initqueue[437]: Warning: dracut-initqueue timeout - starti