Hi All,
We are facing an issue in maple tree implementation for irq descriptor
where while allocating a new descriptor in irq_create_mapping(index=300)
it gets interrupted and get stuck in infinite loop inside
mtree_lookup_walk()=>ma_dead_node(index=287) due to dead node
(0xFFFFFF8819DECF00) and it is the same node where earlier call
for creating descriptor is about to added.
(struct maple_node *)0xFFFFFF8819DECF00 = 0xFFFFFF8819DECF00 -> (
parent = 0xFFFFFF8819DECF00,
slot = (0x0, 0x011E, 0x011F, 0x0120, 0x0121, 0x0122, 0x0123,
0x0124, 0x0125, 0x0126, 0x0127, 0x0128, 0x0129, 0x012A, 0x012B,
0xFFFFFF8813125600, 0xFFFFFF8828BC6E00, 0xFFFFFF8821A4C800, 0x
pad = 0xFFFFFF8819DECF00,
rcu = (next = 0x0, func = 0x011E),
piv_parent = 0x011F,
parent_slot = 32,
type = maple_dense = 0,
slot_len = 33,
ma_flags = 0,
mr64 = (
parent = 0xFFFFFF8819DECF00,
pivot = (0, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295,
296, 297, 298, 299),
slot = (0xFFFFFF8813125600, 0xFFFFFF8828BC6E00,
0xFFFFFF8821A4C800, 0xFFFFFF8815595A00, 0xFFFFFF8815594400,
0xFFFFFF8815596800, 0xFFFFFF8815597E00, 0xFFFFFF88155B7C00,
0xFFFFFF881559400
pad = (0xFFFFFF8813125600, 0xFFFFFF8828BC6E00,
0xFFFFFF8821A4C800, 0xFFFFFF8815595A00, 0xFFFFFF8815594400,
0xFFFFFF8815596800, 0xFFFFFF8815597E00, 0xFFFFFF88155B7C00,
0xFFFFFF8815594000
meta = (end = 0, gap = 0)),
ma64 = (
parent = 0xFFFFFF8819DECF00,
pivot = (0, 286, 287, 288, 289, 290, 291, 292, 293),
slot = (0x0126, 0x0127, 0x0128, 0x0129, 0x012A, 0x012B,
0xFFFFFF8813125600, 0xFFFFFF8828BC6E00, 0xFFFFFF8821A4C800,
0xFFFFFF8815595A00),
gap = (18446743558671647744, 18446743558671656960,
18446743558671662592, 18446743558671793152, 18446743558671646720,
18446743558671650304, 18446743558800159744, 18446743558759686144, 18
meta = (end = 0, gap = 118)),
alloc = (total = 18446743558747508480, node_count = 0,
request_count = 0, slot = (0x011E, 0x011F, 0x0120, 0x0121, 0x0122,
0x0123, 0x0124, 0x0125, 0x0126, 0x0127, 0x0128, 0x0129, 0x012A, 0
Backtrace:
-000|mtree_lookup_walk(inline)
| max = 18446744073709551615
| next = 0xFFFFFF881B197C1C
| offset = 2
| node = 0xFFFFFF881B197C00
| type = maple_arange_64
-000|mtree_load(mt = ?, index = 287)
| index = 287
| mas = (tree = 0xFFFFFFC081EB3EC0, index = 287, last = 287, node
= 0xFFFFFF881B197C1C, min = 0, max = 18446744073709551615, alloc = 0x0,
depth = 1, offset = 0, mas_flags = 0)
| entry = 0x0
-001|irq_to_desc(inline)
-001|generic_handle_irq(irq = ?)
| irq = ?
-002|NSX:0x0::0xFFFFFFC07A0E0500(asm)
-003|__handle_irq_event_percpu(:desc = 0xFFFFFF8807D18600)
| desc = 0xFFFFFF8807D18600
| __already_done = FALSE
| irq = 17
| retval = IRQ_NONE
| res = IRQ_NONE
-004|handle_irq_event_percpu(inline)
| desc = 0xFFFFFF8807D18600
| retval = IRQ_NONE
-004|handle_irq_event(:desc = 0xFFFFFF8807D18600)
| desc = 0xFFFFFF8807D18600
| ret = IRQ_NONE
-005|handle_fasteoi_irq(desc = 0xFFFFFF8807D18600)
| desc = 0xFFFFFF8807D18600
| chip = 0xFFFFFFC081F21288
-006|generic_handle_irq_desc(inline)
-006|handle_irq_desc(inline)
-006|generic_handle_domain_irq(domain = ?, :hwirq = 261)
| domain = ?
| hwirq = 261
-007|__gic_handle_irq(inline)
| irqnr = 261
-007|__gic_handle_irq_from_irqson(inline)
| is_nmi = FALSE
| irqnr = 261
-007|gic_handle_irq()
-008|call_on_irq_stack(asm)
-009|do_interrupt_handler(inline)
| regs = 0xFFFFFFC082142DB0
| old_regs = 0x0
-009|__el1_irq(inline)
| regs = 0xFFFFFFC082142DB0
-009|el1_interrupt(regs = 0xFFFFFFC082142DB0, handler = 0xFFFFFFC0800100F8)
| regs = 0xFFFFFFC082142DB0
| handler = 0xFFFFFFC0800100F8
-010|el1h_64_irq_handler(regs = ?)
| regs = ?
-011|el1h_64_irq(asm)
-->|exception
-012|__memcpy(asm)
-013|mas_mab_cp(:mas = 0xFFFFFFC0821434A8, :mas_start = 80, mas_end = ?,
b_node = 0xFFFFFFC082143108, :mab_start = 80)
| mas = 0xFFFFFFC0821434A8
| mas_start = 0
| b_node = 0xFFFFFFC082143108
| mab_start = 0
| gaps = 0x0
| node = 0xFFFFFF88118A8900
| mt = maple_arange_64
| __fortify_size = 32
| __p_size = 18446744073709551615
| __p_size_field = 18446744073709551615
| __q_size = 0
-014|mast_fill_bnode(:mast = 0xFFFFFFC0821430C8, :mas =
0xFFFFFFC0821434A8, :skip = 1)
| mast = 0xFFFFFFC0821430C8 -> (
| orig_l = 0xFFFFFFC082143000,
| orig_r = 0xFFFFFFC082142FC0,
| l = 0xFFFFFFC082143080 -> (
| tree = 0xFFFFFFC081EB3EC0,
| index = 300,
| last = 300,
| node = 0xFFFFFF881409570C,
| min = 285,
| max = 293,
| alloc = 0xFFFFFF8814094600,
| depth = 3,
| offset = 4,
| mas_flags = 0),
| m = 0x0,
| r = 0xFFFFFFC082143040 -> (
| tree = 0xFFFFFFC081EB3EC0,
| index = 300,
| last = 300,
| node = 0xFFFFFF881409510C,
| min = 294,
| max = 18446744073709551615,
| alloc = 0xFFFFFF8814094600,
| depth = 3,
| offset = 15,
| mas_flags = 0),
| free = 0xFFFFFFC082142FA8,
| destroy = 0x0,
| bn = 0xFFFFFFC082143108)
| mas = 0xFFFFFFC0821434A8
| skip = 1
| split = 0
| old = 0x0
-015|mas_split(inline)
| mas = 0xFFFFFFC0821434A8
| mast = (orig_l = 0xFFFFFFC082143000, orig_r =
0xFFFFFFC082142FC0, l = 0xFFFFFFC082143080, m = 0x0, r =
0xFFFFFFC082143040, free = 0xFFFFFFC082142FA8, destroy = 0x0, bn =
0xFFFFFFC082143108)
| l_mas = (tree = 0xFFFFFFC081EB3EC0, index = 300, last = 300,
node = 0xFFFFFF881409570C, min = 285, max = 293, alloc =
0xFFFFFF8814094600, depth = 3, offset = 4, mas_flags = 0)
| r_mas = (tree = 0xFFFFFFC081EB3EC0, index = 300, last = 300,
node = 0xFFFFFF881409510C, min = 294, max = 18446744073709551615, alloc
= 0xFFFFFF8814094600, depth = 3, offset = 15, mas_flags = 0)
| prev_l_mas = (tree = 0xFFFFFFC081EB3EC0, index = 300, last =
300, node = 0x1, min = 0, max = 18446744073709551615, alloc = 0x0, depth
= 0, offset = 0, mas_flags = 0)
| prev_r_mas = (tree = 0xFFFFFFC081EB3EC0, index = 300, last =
300, node = 0x1, min = 0, max = 18446744073709551615, alloc = 0x0, depth
= 0, offset = 0, mas_flags = 0)
| mat = (head = 0xFFFFFF8819DECF0C, tail = 0xFFFFFF8819DECF0C,
mtree = 0xFFFFFFC081EB3EC0)
| mid_split = 0
-015|mas_commit_b_node(inline)
| b_type = maple_leaf_64
| node = 0x0
-015|mas_wr_bnode(inline)
| b_node = (
| parent = 0x0,
| pivot = (239, 254, 269, 284, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
| slot = (0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0),
| padding = (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0),
| gap = (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0),
| b_end = 4,
| type = maple_leaf_64)
-015|mas_wr_modify(:wr_mas = 0xFFFFFFC082143408)
-016|mas_wr_store_entry(:wr_mas = 0xFFFFFFC082143408)
| wr_mas = 0xFFFFFFC082143408 -> (
| mas = 0xFFFFFFC0821434A8 -> (
| tree = 0xFFFFFFC081EB3EC0,
| index = 300,
| last = 300,
| node = 0xFFFFFF88118A891C,
| min = 225,
| max = 18446744073709551615,
| alloc = 0xFFFFFF8814094600,
| depth = 3,
| offset = 2,
| mas_flags = 0),
| node = 0xFFFFFF8819DECF00,
| r_min = 300,
| r_max = 0xFFFFFFFFFFFFFFFF,
| type = maple_leaf_64,
| offset_end = 15,
| node_end = 15,
| pivots = 0xFFFFFF8819DECF08 -> 0,
| end_piv = 0xFFFFFFFFFFFFFFFF,
| slots = 0xFFFFFF8819DECF80 -> 0xFFFFFF8813125600 -> ,
| entry = 0xFFFFFF8848A27A00,
| content = 0x0)
| mas = 0x0
-017|mas_store_gfp(:mas = 0xFFFFFFC0821434A8, :entry =
0xFFFFFF8848A27A00, :gfp = 3264)
| mas = 0xFFFFFFC0821434A8
| entry = 0xFFFFFF8848A27A00
| gfp = 3264
| wr_mas = (mas = 0xFFFFFFC0821434A8, node = 0xFFFFFF8819DECF00,
r_min = 300, r_max = 18446744073709551615, type = maple_leaf_64,
offset_end = 15, node_end = 15, pivots = 0xFFFFFF8819DECF08, end_piv =
18446744073709551615, slots = 0xFFFFFF8819DECF80, entry =
0xFFFFFF8848A27A00, content = 0x0)
-018|irq_insert_desc(inline)
| desc = 0xFFFFFF8848A27A00
| mas = (tree = 0xFFFFFFC081EB3EC0, index = 300, last = 300, node
= 0xFFFFFF88118A891C, min = 225, max = 18446744073709551615, alloc =
0xFFFFFF8814094600, depth = 3, offset = 2, mas_flags = 0)
-018|alloc_descs(inline)
| start = 300
| node = -1
| affinity = 0x0
| owner = 0x0
| desc = 0xFFFFFF8848A27A00
-018|__irq_alloc_descs(irq = ?, from = ?, :cnt = 1, node = ?, owner =
0x0, :affinity = 0x0)
| cnt = 1
| owner = 0x0
| start = 300
-019|irq_domain_alloc_descs(inline)
| virq = -1
| cnt = 1
| hwirq = 0
| node = -1
| affinity = 0x0
-019|irq_create_mapping_affinity_locked(inline)
| domain = 0xFFFFFF885BFF6840
| hwirq = 0
| affinity = 0x0
| virq = 0
-019|irq_create_mapping_affinity(domain = 0xFFFFFF885BFF6840, hwirq = 0,
affinity = 0x0)
| domain = 0xFFFFFF885BFF6840
| hwirq = 0
| affinity = 0x0
-020|NSX:0x0::0xFFFFFFC07AE32720(asm)
-021|NSX:0x0::0xFFFFFFC07AC9AB38(asm)
-022|NSX:0x0::0xFFFFFFC07B3E49F4(asm)
-023|call_driver_probe(inline)
| dev = 0xFFFFFF8848951848
| drv = 0xFFFFFFC07AFD90C0
| ret = 0
-023|really_probe(:dev = 0xFFFFFF8848951848, :drv = 0xFFFFFFC07AFD90C0)
| dev = 0xFFFFFF8848951848
| drv = 0xFFFFFFC07AFD90C0
| link_ret = 0
| test_remove = FALSE
-024|__driver_probe_device(drv = 0xFFFFFFC07AFD90C0, :dev =
0xFFFFFF8848951848)
| drv = 0xFFFFFFC07AFD90C0
| dev = 0xFFFFFF8848951848
| ret = 0
-025|driver_probe_device(drv = 0xFFFFFFC07AFD90C0, :dev =
0xFFFFFF8848951848)
| drv = 0xFFFFFFC07AFD90C0
| dev = 0xFFFFFF8848951848
| trigger_count = 783
| ret = 0
-026|__device_attach_driver(drv = 0xFFFFFFC07AFD90C0, :_data =
0xFFFFFFC0821437E8)
| drv = 0xFFFFFFC07AFD90C0
| _data = 0xFFFFFFC0821437E8
| data = 0xFFFFFFC0821437E8
| dev = 0xFFFFFF8848951848
| ret = ???
-027|bus_for_each_drv(bus = ?, :start = 0xFFFFFFC0821437E0, :data =
0xFFFFFFC0821437E8, fn = 0xFFFFFFC08089C798)
| data = 0xFFFFFFC0821437E8
| fn = 0xFFFFFFC08089C798
| i = (i_klist = 0xFFFFFF881ED5C6C8, i_cur = 0xFFFFFF8823649968)
| sp = 0xFFFFFF881ED5C600
| error = 0
-028|__device_attach(dev = 0xFFFFFF8848951848)
| dev = 0xFFFFFF8848951848
| async = FALSE
| ret = 0
| data = (dev = 0xFFFFFF8848951848, check_async = TRUE, want_async
= FALSE, have_async = FALSE)
-029|device_initial_probe(dev = 0xFFFFFF8848951848)
| dev = 0xFFFFFF8848951848
-030|bus_probe_device(:dev = 0xFFFFFF8848951848)
| dev = 0xFFFFFF8848951848
| sp = 0xFFFFFF881ED5C600
| sif = 0x0
-031|device_add(:dev = 0xFFFFFF8848951848)
| dev = 0xFFFFFF8848951848
| sp = 0x0
| parent = 0xFFFFFF8851B70080
| class_intf = 0x0
| error = 0
| glue_dir = 0x0
-032|device_register(dev = 0xFFFFFF8848951848)
| dev = 0xFFFFFF8848951848
-033|NSX:0x0::0xFFFFFFC07B3E3944(asm)
-034|NSX:0x0::0xFFFFFFC07B3E3C20(asm)
-035|NSX:0x0::0xFFFFFFC07B6B5148(asm)
-036|platform_probe(:_dev = 0xFFFFFF8848956010)
| _dev = 0xFFFFFF8848956010
| drv = 0xFFFFFFC07B299648
| ret = 0
-037|call_driver_probe(inline)
| dev = 0xFFFFFF8848956010
| drv = 0xFFFFFFC07B299678
| ret = 0
-037|really_probe(:dev = 0xFFFFFF8848956010, :drv = 0xFFFFFFC07B299678)
| dev = 0xFFFFFF8848956010
| drv = 0xFFFFFFC07B299678
| link_ret = 0
| test_remove = FALSE
-038|__driver_probe_device(drv = 0xFFFFFFC07B299678, :dev =
0xFFFFFF8848956010)
| drv = 0xFFFFFFC07B299678
| dev = 0xFFFFFF8848956010
| ret = 0
-039|driver_probe_device(drv = 0xFFFFFFC07B299678, :dev =
0xFFFFFF8848956010)
| drv = 0xFFFFFFC07B299678
| dev = 0xFFFFFF8848956010
| trigger_count = 781
| ret = 0
-040|__device_attach_driver(drv = 0xFFFFFFC07B299678, :_data =
0xFFFFFFC082143BA8)
| drv = 0xFFFFFFC07B299678
| _data = 0xFFFFFFC082143BA8
| data = 0xFFFFFFC082143BA8
| dev = 0xFFFFFF8848956010
| ret = ???
-041|bus_for_each_drv(bus = ?, :start = 0xFFFFFFC082143BA0, :data =
0xFFFFFFC082143BA8, fn = 0xFFFFFFC08089C798)
| data = 0xFFFFFFC082143BA8
| fn = 0xFFFFFFC08089C798
| i = (i_klist = 0xFFFFFF8804034AC8, i_cur = 0xFFFFFF8821B45068)
| sp = 0xFFFFFF8804034A00
| error = 0
-042|__device_attach(dev = 0xFFFFFF8848956010)
| dev = 0xFFFFFF8848956010
| async = FALSE
| ret = 0
| data = (dev = 0xFFFFFF8848956010, check_async = TRUE, want_async
= FALSE, have_async = FALSE)
-043|device_initial_probe(dev = 0xFFFFFF8848956010)
| dev = 0xFFFFFF8848956010
-044|bus_probe_device(:dev = 0xFFFFFF8848956010)
| dev = 0xFFFFFF8848956010
| sp = 0xFFFFFF8804034A00
| sif = 0x0
-045|device_add(:dev = 0xFFFFFF8848956010)
| dev = 0xFFFFFF8848956010
| sp = 0x0
| parent = 0xFFFFFF8851BCE410
| class_intf = 0x0
| error = 0
| glue_dir = 0x0
-046|platform_device_add(pdev = 0xFFFFFF8848956000)
| pdev = 0xFFFFFF8848956000
-047|NSX:0x0::0xFFFFFFC07B73DD48(asm)
-048|process_one_work(:worker = 0xFFFFFF880300AF00, work =
0xFFFFFF8833434930)
| worker = 0xFFFFFF880300AF00
| work = 0xFFFFFF8833434930
| pool = 0xFFFFFF8B7DCAA180
| pwq = 0xFFFFFF8B7DCAE600
| collision = 0x0
| work_data = 18446743573308827141
-049|worker_thread(:__worker = 0xFFFFFF880300AF00)
| __worker = 0xFFFFFF880300AF00
| worker = 0x0
| pool = 0xFFFFFF8B7DCAA180
-050|kthread(_create = 0xFFFFFF8803290240)
| _create = 0xFFFFFF8803290240
| param = (sched_priority = 0)
| create = 0x0
| data = 0xFFFFFF880300AF00
| threadfn = 0x0
| ret = ???
| self = 0xFFFFFF88030D8180
| done = 0xFFFFFFC082133CB8
-051|ret_from_fork(asm)
---|end of frame
-Mukesh
* Mukesh Ojha <[email protected]> [231213 10:46]:
> Hi All,
>
> We are facing an issue in maple tree implementation for irq descriptor
> where while allocating a new descriptor in irq_create_mapping(index=300) it
> gets interrupted and get stuck in infinite loop inside
> mtree_lookup_walk()=>ma_dead_node(index=287) due to dead node
> (0xFFFFFF8819DECF00) and it is the same node where earlier call
> for creating descriptor is about to added.
What kernel version?
There was an issue with the tree a while back which could result in this
happening [1], although I was never successful in causing it or seeing
it before now.
Looking though the dump below, it appears that you do not have the
patches in [1] as they should prevent the node from being marked dead
until the new node exists in the tree. Note that this occurs in your
case in splitting of the node which should be fixed in the last patch of
the series.
[1] https://lore.kernel.org/all/[email protected]/T/#u
Thanks,
Liam
>
>
> (struct maple_node *)0xFFFFFF8819DECF00 = 0xFFFFFF8819DECF00 -> (
> parent = 0xFFFFFF8819DECF00,
> slot = (0x0, 0x011E, 0x011F, 0x0120, 0x0121, 0x0122, 0x0123, 0x0124,
> 0x0125, 0x0126, 0x0127, 0x0128, 0x0129, 0x012A, 0x012B, 0xFFFFFF8813125600,
> 0xFFFFFF8828BC6E00, 0xFFFFFF8821A4C800, 0x
> pad = 0xFFFFFF8819DECF00,
> rcu = (next = 0x0, func = 0x011E),
> piv_parent = 0x011F,
> parent_slot = 32,
> type = maple_dense = 0,
> slot_len = 33,
> ma_flags = 0,
> mr64 = (
> parent = 0xFFFFFF8819DECF00,
> pivot = (0, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295, 296,
> 297, 298, 299),
> slot = (0xFFFFFF8813125600, 0xFFFFFF8828BC6E00, 0xFFFFFF8821A4C800,
> 0xFFFFFF8815595A00, 0xFFFFFF8815594400, 0xFFFFFF8815596800,
> 0xFFFFFF8815597E00, 0xFFFFFF88155B7C00, 0xFFFFFF881559400
> pad = (0xFFFFFF8813125600, 0xFFFFFF8828BC6E00, 0xFFFFFF8821A4C800,
> 0xFFFFFF8815595A00, 0xFFFFFF8815594400, 0xFFFFFF8815596800,
> 0xFFFFFF8815597E00, 0xFFFFFF88155B7C00, 0xFFFFFF8815594000
> meta = (end = 0, gap = 0)),
> ma64 = (
> parent = 0xFFFFFF8819DECF00,
> pivot = (0, 286, 287, 288, 289, 290, 291, 292, 293),
> slot = (0x0126, 0x0127, 0x0128, 0x0129, 0x012A, 0x012B,
> 0xFFFFFF8813125600, 0xFFFFFF8828BC6E00, 0xFFFFFF8821A4C800,
> 0xFFFFFF8815595A00),
> gap = (18446743558671647744, 18446743558671656960,
> 18446743558671662592, 18446743558671793152, 18446743558671646720,
> 18446743558671650304, 18446743558800159744, 18446743558759686144, 18
> meta = (end = 0, gap = 118)),
> alloc = (total = 18446743558747508480, node_count = 0, request_count =
> 0, slot = (0x011E, 0x011F, 0x0120, 0x0121, 0x0122, 0x0123, 0x0124, 0x0125,
> 0x0126, 0x0127, 0x0128, 0x0129, 0x012A, 0
>
> Backtrace:
>
> -000|mtree_lookup_walk(inline)
> | max = 18446744073709551615
> | next = 0xFFFFFF881B197C1C
> | offset = 2
> | node = 0xFFFFFF881B197C00
> | type = maple_arange_64
> -000|mtree_load(mt = ?, index = 287)
> | index = 287
> | mas = (tree = 0xFFFFFFC081EB3EC0, index = 287, last = 287, node =
> 0xFFFFFF881B197C1C, min = 0, max = 18446744073709551615, alloc = 0x0, depth
> = 1, offset = 0, mas_flags = 0)
> | entry = 0x0
> -001|irq_to_desc(inline)
> -001|generic_handle_irq(irq = ?)
> | irq = ?
> -002|NSX:0x0::0xFFFFFFC07A0E0500(asm)
> -003|__handle_irq_event_percpu(:desc = 0xFFFFFF8807D18600)
> | desc = 0xFFFFFF8807D18600
> | __already_done = FALSE
> | irq = 17
> | retval = IRQ_NONE
> | res = IRQ_NONE
> -004|handle_irq_event_percpu(inline)
> | desc = 0xFFFFFF8807D18600
> | retval = IRQ_NONE
> -004|handle_irq_event(:desc = 0xFFFFFF8807D18600)
> | desc = 0xFFFFFF8807D18600
> | ret = IRQ_NONE
> -005|handle_fasteoi_irq(desc = 0xFFFFFF8807D18600)
> | desc = 0xFFFFFF8807D18600
> | chip = 0xFFFFFFC081F21288
> -006|generic_handle_irq_desc(inline)
> -006|handle_irq_desc(inline)
> -006|generic_handle_domain_irq(domain = ?, :hwirq = 261)
> | domain = ?
> | hwirq = 261
> -007|__gic_handle_irq(inline)
> | irqnr = 261
> -007|__gic_handle_irq_from_irqson(inline)
> | is_nmi = FALSE
> | irqnr = 261
> -007|gic_handle_irq()
> -008|call_on_irq_stack(asm)
> -009|do_interrupt_handler(inline)
> | regs = 0xFFFFFFC082142DB0
> | old_regs = 0x0
> -009|__el1_irq(inline)
> | regs = 0xFFFFFFC082142DB0
> -009|el1_interrupt(regs = 0xFFFFFFC082142DB0, handler = 0xFFFFFFC0800100F8)
> | regs = 0xFFFFFFC082142DB0
> | handler = 0xFFFFFFC0800100F8
> -010|el1h_64_irq_handler(regs = ?)
> | regs = ?
> -011|el1h_64_irq(asm)
> -->|exception
> -012|__memcpy(asm)
> -013|mas_mab_cp(:mas = 0xFFFFFFC0821434A8, :mas_start = 80, mas_end = ?,
> b_node = 0xFFFFFFC082143108, :mab_start = 80)
> | mas = 0xFFFFFFC0821434A8
> | mas_start = 0
> | b_node = 0xFFFFFFC082143108
> | mab_start = 0
> | gaps = 0x0
> | node = 0xFFFFFF88118A8900
> | mt = maple_arange_64
> | __fortify_size = 32
> | __p_size = 18446744073709551615
> | __p_size_field = 18446744073709551615
> | __q_size = 0
> -014|mast_fill_bnode(:mast = 0xFFFFFFC0821430C8, :mas = 0xFFFFFFC0821434A8,
> :skip = 1)
> | mast = 0xFFFFFFC0821430C8 -> (
> | orig_l = 0xFFFFFFC082143000,
> | orig_r = 0xFFFFFFC082142FC0,
> | l = 0xFFFFFFC082143080 -> (
> | tree = 0xFFFFFFC081EB3EC0,
> | index = 300,
> | last = 300,
> | node = 0xFFFFFF881409570C,
> | min = 285,
> | max = 293,
> | alloc = 0xFFFFFF8814094600,
> | depth = 3,
> | offset = 4,
> | mas_flags = 0),
> | m = 0x0,
> | r = 0xFFFFFFC082143040 -> (
> | tree = 0xFFFFFFC081EB3EC0,
> | index = 300,
> | last = 300,
> | node = 0xFFFFFF881409510C,
> | min = 294,
> | max = 18446744073709551615,
> | alloc = 0xFFFFFF8814094600,
> | depth = 3,
> | offset = 15,
> | mas_flags = 0),
> | free = 0xFFFFFFC082142FA8,
> | destroy = 0x0,
> | bn = 0xFFFFFFC082143108)
> | mas = 0xFFFFFFC0821434A8
> | skip = 1
> | split = 0
> | old = 0x0
> -015|mas_split(inline)
> | mas = 0xFFFFFFC0821434A8
> | mast = (orig_l = 0xFFFFFFC082143000, orig_r = 0xFFFFFFC082142FC0, l =
> 0xFFFFFFC082143080, m = 0x0, r = 0xFFFFFFC082143040, free =
> 0xFFFFFFC082142FA8, destroy = 0x0, bn = 0xFFFFFFC082143108)
> | l_mas = (tree = 0xFFFFFFC081EB3EC0, index = 300, last = 300, node =
> 0xFFFFFF881409570C, min = 285, max = 293, alloc = 0xFFFFFF8814094600, depth
> = 3, offset = 4, mas_flags = 0)
> | r_mas = (tree = 0xFFFFFFC081EB3EC0, index = 300, last = 300, node =
> 0xFFFFFF881409510C, min = 294, max = 18446744073709551615, alloc =
> 0xFFFFFF8814094600, depth = 3, offset = 15, mas_flags = 0)
> | prev_l_mas = (tree = 0xFFFFFFC081EB3EC0, index = 300, last = 300,
> node = 0x1, min = 0, max = 18446744073709551615, alloc = 0x0, depth = 0,
> offset = 0, mas_flags = 0)
> | prev_r_mas = (tree = 0xFFFFFFC081EB3EC0, index = 300, last = 300,
> node = 0x1, min = 0, max = 18446744073709551615, alloc = 0x0, depth = 0,
> offset = 0, mas_flags = 0)
> | mat = (head = 0xFFFFFF8819DECF0C, tail = 0xFFFFFF8819DECF0C, mtree =
> 0xFFFFFFC081EB3EC0)
> | mid_split = 0
> -015|mas_commit_b_node(inline)
> | b_type = maple_leaf_64
> | node = 0x0
> -015|mas_wr_bnode(inline)
> | b_node = (
> | parent = 0x0,
> | pivot = (239, 254, 269, 284, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
> | slot = (0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
> 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
> 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0),
> | padding = (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0, 0),
> | gap = (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0),
> | b_end = 4,
> | type = maple_leaf_64)
> -015|mas_wr_modify(:wr_mas = 0xFFFFFFC082143408)
> -016|mas_wr_store_entry(:wr_mas = 0xFFFFFFC082143408)
> | wr_mas = 0xFFFFFFC082143408 -> (
> | mas = 0xFFFFFFC0821434A8 -> (
> | tree = 0xFFFFFFC081EB3EC0,
> | index = 300,
> | last = 300,
> | node = 0xFFFFFF88118A891C,
> | min = 225,
> | max = 18446744073709551615,
> | alloc = 0xFFFFFF8814094600,
> | depth = 3,
> | offset = 2,
> | mas_flags = 0),
> | node = 0xFFFFFF8819DECF00,
> | r_min = 300,
> | r_max = 0xFFFFFFFFFFFFFFFF,
> | type = maple_leaf_64,
> | offset_end = 15,
> | node_end = 15,
> | pivots = 0xFFFFFF8819DECF08 -> 0,
> | end_piv = 0xFFFFFFFFFFFFFFFF,
> | slots = 0xFFFFFF8819DECF80 -> 0xFFFFFF8813125600 -> ,
> | entry = 0xFFFFFF8848A27A00,
> | content = 0x0)
> | mas = 0x0
> -017|mas_store_gfp(:mas = 0xFFFFFFC0821434A8, :entry = 0xFFFFFF8848A27A00,
> :gfp = 3264)
> | mas = 0xFFFFFFC0821434A8
> | entry = 0xFFFFFF8848A27A00
> | gfp = 3264
> | wr_mas = (mas = 0xFFFFFFC0821434A8, node = 0xFFFFFF8819DECF00, r_min
> = 300, r_max = 18446744073709551615, type = maple_leaf_64, offset_end = 15,
> node_end = 15, pivots = 0xFFFFFF8819DECF08, end_piv = 18446744073709551615,
> slots = 0xFFFFFF8819DECF80, entry = 0xFFFFFF8848A27A00, content = 0x0)
> -018|irq_insert_desc(inline)
> | desc = 0xFFFFFF8848A27A00
> | mas = (tree = 0xFFFFFFC081EB3EC0, index = 300, last = 300, node =
> 0xFFFFFF88118A891C, min = 225, max = 18446744073709551615, alloc =
> 0xFFFFFF8814094600, depth = 3, offset = 2, mas_flags = 0)
> -018|alloc_descs(inline)
> | start = 300
> | node = -1
> | affinity = 0x0
> | owner = 0x0
> | desc = 0xFFFFFF8848A27A00
> -018|__irq_alloc_descs(irq = ?, from = ?, :cnt = 1, node = ?, owner = 0x0,
> :affinity = 0x0)
> | cnt = 1
> | owner = 0x0
> | start = 300
> -019|irq_domain_alloc_descs(inline)
> | virq = -1
> | cnt = 1
> | hwirq = 0
> | node = -1
> | affinity = 0x0
> -019|irq_create_mapping_affinity_locked(inline)
> | domain = 0xFFFFFF885BFF6840
> | hwirq = 0
> | affinity = 0x0
> | virq = 0
> -019|irq_create_mapping_affinity(domain = 0xFFFFFF885BFF6840, hwirq = 0,
> affinity = 0x0)
> | domain = 0xFFFFFF885BFF6840
> | hwirq = 0
> | affinity = 0x0
> -020|NSX:0x0::0xFFFFFFC07AE32720(asm)
> -021|NSX:0x0::0xFFFFFFC07AC9AB38(asm)
> -022|NSX:0x0::0xFFFFFFC07B3E49F4(asm)
> -023|call_driver_probe(inline)
> | dev = 0xFFFFFF8848951848
> | drv = 0xFFFFFFC07AFD90C0
> | ret = 0
> -023|really_probe(:dev = 0xFFFFFF8848951848, :drv = 0xFFFFFFC07AFD90C0)
> | dev = 0xFFFFFF8848951848
> | drv = 0xFFFFFFC07AFD90C0
> | link_ret = 0
> | test_remove = FALSE
> -024|__driver_probe_device(drv = 0xFFFFFFC07AFD90C0, :dev =
> 0xFFFFFF8848951848)
> | drv = 0xFFFFFFC07AFD90C0
> | dev = 0xFFFFFF8848951848
> | ret = 0
> -025|driver_probe_device(drv = 0xFFFFFFC07AFD90C0, :dev =
> 0xFFFFFF8848951848)
> | drv = 0xFFFFFFC07AFD90C0
> | dev = 0xFFFFFF8848951848
> | trigger_count = 783
> | ret = 0
> -026|__device_attach_driver(drv = 0xFFFFFFC07AFD90C0, :_data =
> 0xFFFFFFC0821437E8)
> | drv = 0xFFFFFFC07AFD90C0
> | _data = 0xFFFFFFC0821437E8
> | data = 0xFFFFFFC0821437E8
> | dev = 0xFFFFFF8848951848
> | ret = ???
> -027|bus_for_each_drv(bus = ?, :start = 0xFFFFFFC0821437E0, :data =
> 0xFFFFFFC0821437E8, fn = 0xFFFFFFC08089C798)
> | data = 0xFFFFFFC0821437E8
> | fn = 0xFFFFFFC08089C798
> | i = (i_klist = 0xFFFFFF881ED5C6C8, i_cur = 0xFFFFFF8823649968)
> | sp = 0xFFFFFF881ED5C600
> | error = 0
> -028|__device_attach(dev = 0xFFFFFF8848951848)
> | dev = 0xFFFFFF8848951848
> | async = FALSE
> | ret = 0
> | data = (dev = 0xFFFFFF8848951848, check_async = TRUE, want_async =
> FALSE, have_async = FALSE)
> -029|device_initial_probe(dev = 0xFFFFFF8848951848)
> | dev = 0xFFFFFF8848951848
> -030|bus_probe_device(:dev = 0xFFFFFF8848951848)
> | dev = 0xFFFFFF8848951848
> | sp = 0xFFFFFF881ED5C600
> | sif = 0x0
> -031|device_add(:dev = 0xFFFFFF8848951848)
> | dev = 0xFFFFFF8848951848
> | sp = 0x0
> | parent = 0xFFFFFF8851B70080
> | class_intf = 0x0
> | error = 0
> | glue_dir = 0x0
> -032|device_register(dev = 0xFFFFFF8848951848)
> | dev = 0xFFFFFF8848951848
> -033|NSX:0x0::0xFFFFFFC07B3E3944(asm)
> -034|NSX:0x0::0xFFFFFFC07B3E3C20(asm)
> -035|NSX:0x0::0xFFFFFFC07B6B5148(asm)
> -036|platform_probe(:_dev = 0xFFFFFF8848956010)
> | _dev = 0xFFFFFF8848956010
> | drv = 0xFFFFFFC07B299648
> | ret = 0
> -037|call_driver_probe(inline)
> | dev = 0xFFFFFF8848956010
> | drv = 0xFFFFFFC07B299678
> | ret = 0
> -037|really_probe(:dev = 0xFFFFFF8848956010, :drv = 0xFFFFFFC07B299678)
> | dev = 0xFFFFFF8848956010
> | drv = 0xFFFFFFC07B299678
> | link_ret = 0
> | test_remove = FALSE
> -038|__driver_probe_device(drv = 0xFFFFFFC07B299678, :dev =
> 0xFFFFFF8848956010)
> | drv = 0xFFFFFFC07B299678
> | dev = 0xFFFFFF8848956010
> | ret = 0
> -039|driver_probe_device(drv = 0xFFFFFFC07B299678, :dev =
> 0xFFFFFF8848956010)
> | drv = 0xFFFFFFC07B299678
> | dev = 0xFFFFFF8848956010
> | trigger_count = 781
> | ret = 0
> -040|__device_attach_driver(drv = 0xFFFFFFC07B299678, :_data =
> 0xFFFFFFC082143BA8)
> | drv = 0xFFFFFFC07B299678
> | _data = 0xFFFFFFC082143BA8
> | data = 0xFFFFFFC082143BA8
> | dev = 0xFFFFFF8848956010
> | ret = ???
> -041|bus_for_each_drv(bus = ?, :start = 0xFFFFFFC082143BA0, :data =
> 0xFFFFFFC082143BA8, fn = 0xFFFFFFC08089C798)
> | data = 0xFFFFFFC082143BA8
> | fn = 0xFFFFFFC08089C798
> | i = (i_klist = 0xFFFFFF8804034AC8, i_cur = 0xFFFFFF8821B45068)
> | sp = 0xFFFFFF8804034A00
> | error = 0
> -042|__device_attach(dev = 0xFFFFFF8848956010)
> | dev = 0xFFFFFF8848956010
> | async = FALSE
> | ret = 0
> | data = (dev = 0xFFFFFF8848956010, check_async = TRUE, want_async =
> FALSE, have_async = FALSE)
> -043|device_initial_probe(dev = 0xFFFFFF8848956010)
> | dev = 0xFFFFFF8848956010
> -044|bus_probe_device(:dev = 0xFFFFFF8848956010)
> | dev = 0xFFFFFF8848956010
> | sp = 0xFFFFFF8804034A00
> | sif = 0x0
> -045|device_add(:dev = 0xFFFFFF8848956010)
> | dev = 0xFFFFFF8848956010
> | sp = 0x0
> | parent = 0xFFFFFF8851BCE410
> | class_intf = 0x0
> | error = 0
> | glue_dir = 0x0
> -046|platform_device_add(pdev = 0xFFFFFF8848956000)
> | pdev = 0xFFFFFF8848956000
> -047|NSX:0x0::0xFFFFFFC07B73DD48(asm)
> -048|process_one_work(:worker = 0xFFFFFF880300AF00, work =
> 0xFFFFFF8833434930)
> | worker = 0xFFFFFF880300AF00
> | work = 0xFFFFFF8833434930
> | pool = 0xFFFFFF8B7DCAA180
> | pwq = 0xFFFFFF8B7DCAE600
> | collision = 0x0
> | work_data = 18446743573308827141
> -049|worker_thread(:__worker = 0xFFFFFF880300AF00)
> | __worker = 0xFFFFFF880300AF00
> | worker = 0x0
> | pool = 0xFFFFFF8B7DCAA180
> -050|kthread(_create = 0xFFFFFF8803290240)
> | _create = 0xFFFFFF8803290240
> | param = (sched_priority = 0)
> | create = 0x0
> | data = 0xFFFFFF880300AF00
> | threadfn = 0x0
> | ret = ???
> | self = 0xFFFFFF88030D8180
> | done = 0xFFFFFFC082133CB8
> -051|ret_from_fork(asm)
> ---|end of frame
>
> -Mukesh
Hi @Liam,
On 12/14/2023 1:05 AM, Liam R. Howlett wrote:
> * Mukesh Ojha <[email protected]> [231213 10:46]:
>> Hi All,
>>
>> We are facing an issue in maple tree implementation for irq descriptor
>> where while allocating a new descriptor in irq_create_mapping(index=300) it
>> gets interrupted and get stuck in infinite loop inside
>> mtree_lookup_walk()=>ma_dead_node(index=287) due to dead node
>> (0xFFFFFF8819DECF00) and it is the same node where earlier call
>> for creating descriptor is about to added.
>
> What kernel version?
6.5
>
> There was an issue with the tree a while back which could result in this
> happening [1], although I was never successful in causing it or seeing
> it before now.
>
> Looking though the dump below, it appears that you do not have the
> patches in [1] as they should prevent the node from being marked dead
> until the new node exists in the tree. Note that this occurs in your
> case in splitting of the node which should be fixed in the last patch of
> the series.
>
> [1] https://lore.kernel.org/all/[email protected]/T/#u
Thanks for the prompt response, yes these patches are missing.
Let me apply them and try.
-Mukesh
>
> Thanks,
> Liam
>
>>
>>
>> (struct maple_node *)0xFFFFFF8819DECF00 = 0xFFFFFF8819DECF00 -> (
>> parent = 0xFFFFFF8819DECF00,
>> slot = (0x0, 0x011E, 0x011F, 0x0120, 0x0121, 0x0122, 0x0123, 0x0124,
>> 0x0125, 0x0126, 0x0127, 0x0128, 0x0129, 0x012A, 0x012B, 0xFFFFFF8813125600,
>> 0xFFFFFF8828BC6E00, 0xFFFFFF8821A4C800, 0x
>> pad = 0xFFFFFF8819DECF00,
>> rcu = (next = 0x0, func = 0x011E),
>> piv_parent = 0x011F,
>> parent_slot = 32,
>> type = maple_dense = 0,
>> slot_len = 33,
>> ma_flags = 0,
>> mr64 = (
>> parent = 0xFFFFFF8819DECF00,
>> pivot = (0, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295, 296,
>> 297, 298, 299),
>> slot = (0xFFFFFF8813125600, 0xFFFFFF8828BC6E00, 0xFFFFFF8821A4C800,
>> 0xFFFFFF8815595A00, 0xFFFFFF8815594400, 0xFFFFFF8815596800,
>> 0xFFFFFF8815597E00, 0xFFFFFF88155B7C00, 0xFFFFFF881559400
>> pad = (0xFFFFFF8813125600, 0xFFFFFF8828BC6E00, 0xFFFFFF8821A4C800,
>> 0xFFFFFF8815595A00, 0xFFFFFF8815594400, 0xFFFFFF8815596800,
>> 0xFFFFFF8815597E00, 0xFFFFFF88155B7C00, 0xFFFFFF8815594000
>> meta = (end = 0, gap = 0)),
>> ma64 = (
>> parent = 0xFFFFFF8819DECF00,
>> pivot = (0, 286, 287, 288, 289, 290, 291, 292, 293),
>> slot = (0x0126, 0x0127, 0x0128, 0x0129, 0x012A, 0x012B,
>> 0xFFFFFF8813125600, 0xFFFFFF8828BC6E00, 0xFFFFFF8821A4C800,
>> 0xFFFFFF8815595A00),
>> gap = (18446743558671647744, 18446743558671656960,
>> 18446743558671662592, 18446743558671793152, 18446743558671646720,
>> 18446743558671650304, 18446743558800159744, 18446743558759686144, 18
>> meta = (end = 0, gap = 118)),
>> alloc = (total = 18446743558747508480, node_count = 0, request_count =
>> 0, slot = (0x011E, 0x011F, 0x0120, 0x0121, 0x0122, 0x0123, 0x0124, 0x0125,
>> 0x0126, 0x0127, 0x0128, 0x0129, 0x012A, 0
>>
>> Backtrace:
>>
>> -000|mtree_lookup_walk(inline)
>> | max = 18446744073709551615
>> | next = 0xFFFFFF881B197C1C
>> | offset = 2
>> | node = 0xFFFFFF881B197C00
>> | type = maple_arange_64
>> -000|mtree_load(mt = ?, index = 287)
>> | index = 287
>> | mas = (tree = 0xFFFFFFC081EB3EC0, index = 287, last = 287, node =
>> 0xFFFFFF881B197C1C, min = 0, max = 18446744073709551615, alloc = 0x0, depth
>> = 1, offset = 0, mas_flags = 0)
>> | entry = 0x0
>> -001|irq_to_desc(inline)
>> -001|generic_handle_irq(irq = ?)
>> | irq = ?
>> -002|NSX:0x0::0xFFFFFFC07A0E0500(asm)
>> -003|__handle_irq_event_percpu(:desc = 0xFFFFFF8807D18600)
>> | desc = 0xFFFFFF8807D18600
>> | __already_done = FALSE
>> | irq = 17
>> | retval = IRQ_NONE
>> | res = IRQ_NONE
>> -004|handle_irq_event_percpu(inline)
>> | desc = 0xFFFFFF8807D18600
>> | retval = IRQ_NONE
>> -004|handle_irq_event(:desc = 0xFFFFFF8807D18600)
>> | desc = 0xFFFFFF8807D18600
>> | ret = IRQ_NONE
>> -005|handle_fasteoi_irq(desc = 0xFFFFFF8807D18600)
>> | desc = 0xFFFFFF8807D18600
>> | chip = 0xFFFFFFC081F21288
>> -006|generic_handle_irq_desc(inline)
>> -006|handle_irq_desc(inline)
>> -006|generic_handle_domain_irq(domain = ?, :hwirq = 261)
>> | domain = ?
>> | hwirq = 261
>> -007|__gic_handle_irq(inline)
>> | irqnr = 261
>> -007|__gic_handle_irq_from_irqson(inline)
>> | is_nmi = FALSE
>> | irqnr = 261
>> -007|gic_handle_irq()
>> -008|call_on_irq_stack(asm)
>> -009|do_interrupt_handler(inline)
>> | regs = 0xFFFFFFC082142DB0
>> | old_regs = 0x0
>> -009|__el1_irq(inline)
>> | regs = 0xFFFFFFC082142DB0
>> -009|el1_interrupt(regs = 0xFFFFFFC082142DB0, handler = 0xFFFFFFC0800100F8)
>> | regs = 0xFFFFFFC082142DB0
>> | handler = 0xFFFFFFC0800100F8
>> -010|el1h_64_irq_handler(regs = ?)
>> | regs = ?
>> -011|el1h_64_irq(asm)
>> -->|exception
>> -012|__memcpy(asm)
>> -013|mas_mab_cp(:mas = 0xFFFFFFC0821434A8, :mas_start = 80, mas_end = ?,
>> b_node = 0xFFFFFFC082143108, :mab_start = 80)
>> | mas = 0xFFFFFFC0821434A8
>> | mas_start = 0
>> | b_node = 0xFFFFFFC082143108
>> | mab_start = 0
>> | gaps = 0x0
>> | node = 0xFFFFFF88118A8900
>> | mt = maple_arange_64
>> | __fortify_size = 32
>> | __p_size = 18446744073709551615
>> | __p_size_field = 18446744073709551615
>> | __q_size = 0
>> -014|mast_fill_bnode(:mast = 0xFFFFFFC0821430C8, :mas = 0xFFFFFFC0821434A8,
>> :skip = 1)
>> | mast = 0xFFFFFFC0821430C8 -> (
>> | orig_l = 0xFFFFFFC082143000,
>> | orig_r = 0xFFFFFFC082142FC0,
>> | l = 0xFFFFFFC082143080 -> (
>> | tree = 0xFFFFFFC081EB3EC0,
>> | index = 300,
>> | last = 300,
>> | node = 0xFFFFFF881409570C,
>> | min = 285,
>> | max = 293,
>> | alloc = 0xFFFFFF8814094600,
>> | depth = 3,
>> | offset = 4,
>> | mas_flags = 0),
>> | m = 0x0,
>> | r = 0xFFFFFFC082143040 -> (
>> | tree = 0xFFFFFFC081EB3EC0,
>> | index = 300,
>> | last = 300,
>> | node = 0xFFFFFF881409510C,
>> | min = 294,
>> | max = 18446744073709551615,
>> | alloc = 0xFFFFFF8814094600,
>> | depth = 3,
>> | offset = 15,
>> | mas_flags = 0),
>> | free = 0xFFFFFFC082142FA8,
>> | destroy = 0x0,
>> | bn = 0xFFFFFFC082143108)
>> | mas = 0xFFFFFFC0821434A8
>> | skip = 1
>> | split = 0
>> | old = 0x0
>> -015|mas_split(inline)
>> | mas = 0xFFFFFFC0821434A8
>> | mast = (orig_l = 0xFFFFFFC082143000, orig_r = 0xFFFFFFC082142FC0, l =
>> 0xFFFFFFC082143080, m = 0x0, r = 0xFFFFFFC082143040, free =
>> 0xFFFFFFC082142FA8, destroy = 0x0, bn = 0xFFFFFFC082143108)
>> | l_mas = (tree = 0xFFFFFFC081EB3EC0, index = 300, last = 300, node =
>> 0xFFFFFF881409570C, min = 285, max = 293, alloc = 0xFFFFFF8814094600, depth
>> = 3, offset = 4, mas_flags = 0)
>> | r_mas = (tree = 0xFFFFFFC081EB3EC0, index = 300, last = 300, node =
>> 0xFFFFFF881409510C, min = 294, max = 18446744073709551615, alloc =
>> 0xFFFFFF8814094600, depth = 3, offset = 15, mas_flags = 0)
>> | prev_l_mas = (tree = 0xFFFFFFC081EB3EC0, index = 300, last = 300,
>> node = 0x1, min = 0, max = 18446744073709551615, alloc = 0x0, depth = 0,
>> offset = 0, mas_flags = 0)
>> | prev_r_mas = (tree = 0xFFFFFFC081EB3EC0, index = 300, last = 300,
>> node = 0x1, min = 0, max = 18446744073709551615, alloc = 0x0, depth = 0,
>> offset = 0, mas_flags = 0)
>> | mat = (head = 0xFFFFFF8819DECF0C, tail = 0xFFFFFF8819DECF0C, mtree =
>> 0xFFFFFFC081EB3EC0)
>> | mid_split = 0
>> -015|mas_commit_b_node(inline)
>> | b_type = maple_leaf_64
>> | node = 0x0
>> -015|mas_wr_bnode(inline)
>> | b_node = (
>> | parent = 0x0,
>> | pivot = (239, 254, 269, 284, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
>> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
>> | slot = (0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
>> 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
>> 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0),
>> | padding = (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
>> 0, 0),
>> | gap = (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
>> 0),
>> | b_end = 4,
>> | type = maple_leaf_64)
>> -015|mas_wr_modify(:wr_mas = 0xFFFFFFC082143408)
>> -016|mas_wr_store_entry(:wr_mas = 0xFFFFFFC082143408)
>> | wr_mas = 0xFFFFFFC082143408 -> (
>> | mas = 0xFFFFFFC0821434A8 -> (
>> | tree = 0xFFFFFFC081EB3EC0,
>> | index = 300,
>> | last = 300,
>> | node = 0xFFFFFF88118A891C,
>> | min = 225,
>> | max = 18446744073709551615,
>> | alloc = 0xFFFFFF8814094600,
>> | depth = 3,
>> | offset = 2,
>> | mas_flags = 0),
>> | node = 0xFFFFFF8819DECF00,
>> | r_min = 300,
>> | r_max = 0xFFFFFFFFFFFFFFFF,
>> | type = maple_leaf_64,
>> | offset_end = 15,
>> | node_end = 15,
>> | pivots = 0xFFFFFF8819DECF08 -> 0,
>> | end_piv = 0xFFFFFFFFFFFFFFFF,
>> | slots = 0xFFFFFF8819DECF80 -> 0xFFFFFF8813125600 -> ,
>> | entry = 0xFFFFFF8848A27A00,
>> | content = 0x0)
>> | mas = 0x0
>> -017|mas_store_gfp(:mas = 0xFFFFFFC0821434A8, :entry = 0xFFFFFF8848A27A00,
>> :gfp = 3264)
>> | mas = 0xFFFFFFC0821434A8
>> | entry = 0xFFFFFF8848A27A00
>> | gfp = 3264
>> | wr_mas = (mas = 0xFFFFFFC0821434A8, node = 0xFFFFFF8819DECF00, r_min
>> = 300, r_max = 18446744073709551615, type = maple_leaf_64, offset_end = 15,
>> node_end = 15, pivots = 0xFFFFFF8819DECF08, end_piv = 18446744073709551615,
>> slots = 0xFFFFFF8819DECF80, entry = 0xFFFFFF8848A27A00, content = 0x0)
>> -018|irq_insert_desc(inline)
>> | desc = 0xFFFFFF8848A27A00
>> | mas = (tree = 0xFFFFFFC081EB3EC0, index = 300, last = 300, node =
>> 0xFFFFFF88118A891C, min = 225, max = 18446744073709551615, alloc =
>> 0xFFFFFF8814094600, depth = 3, offset = 2, mas_flags = 0)
>> -018|alloc_descs(inline)
>> | start = 300
>> | node = -1
>> | affinity = 0x0
>> | owner = 0x0
>> | desc = 0xFFFFFF8848A27A00
>> -018|__irq_alloc_descs(irq = ?, from = ?, :cnt = 1, node = ?, owner = 0x0,
>> :affinity = 0x0)
>> | cnt = 1
>> | owner = 0x0
>> | start = 300
>> -019|irq_domain_alloc_descs(inline)
>> | virq = -1
>> | cnt = 1
>> | hwirq = 0
>> | node = -1
>> | affinity = 0x0
>> -019|irq_create_mapping_affinity_locked(inline)
>> | domain = 0xFFFFFF885BFF6840
>> | hwirq = 0
>> | affinity = 0x0
>> | virq = 0
>> -019|irq_create_mapping_affinity(domain = 0xFFFFFF885BFF6840, hwirq = 0,
>> affinity = 0x0)
>> | domain = 0xFFFFFF885BFF6840
>> | hwirq = 0
>> | affinity = 0x0
>> -020|NSX:0x0::0xFFFFFFC07AE32720(asm)
>> -021|NSX:0x0::0xFFFFFFC07AC9AB38(asm)
>> -022|NSX:0x0::0xFFFFFFC07B3E49F4(asm)
>> -023|call_driver_probe(inline)
>> | dev = 0xFFFFFF8848951848
>> | drv = 0xFFFFFFC07AFD90C0
>> | ret = 0
>> -023|really_probe(:dev = 0xFFFFFF8848951848, :drv = 0xFFFFFFC07AFD90C0)
>> | dev = 0xFFFFFF8848951848
>> | drv = 0xFFFFFFC07AFD90C0
>> | link_ret = 0
>> | test_remove = FALSE
>> -024|__driver_probe_device(drv = 0xFFFFFFC07AFD90C0, :dev =
>> 0xFFFFFF8848951848)
>> | drv = 0xFFFFFFC07AFD90C0
>> | dev = 0xFFFFFF8848951848
>> | ret = 0
>> -025|driver_probe_device(drv = 0xFFFFFFC07AFD90C0, :dev =
>> 0xFFFFFF8848951848)
>> | drv = 0xFFFFFFC07AFD90C0
>> | dev = 0xFFFFFF8848951848
>> | trigger_count = 783
>> | ret = 0
>> -026|__device_attach_driver(drv = 0xFFFFFFC07AFD90C0, :_data =
>> 0xFFFFFFC0821437E8)
>> | drv = 0xFFFFFFC07AFD90C0
>> | _data = 0xFFFFFFC0821437E8
>> | data = 0xFFFFFFC0821437E8
>> | dev = 0xFFFFFF8848951848
>> | ret = ???
>> -027|bus_for_each_drv(bus = ?, :start = 0xFFFFFFC0821437E0, :data =
>> 0xFFFFFFC0821437E8, fn = 0xFFFFFFC08089C798)
>> | data = 0xFFFFFFC0821437E8
>> | fn = 0xFFFFFFC08089C798
>> | i = (i_klist = 0xFFFFFF881ED5C6C8, i_cur = 0xFFFFFF8823649968)
>> | sp = 0xFFFFFF881ED5C600
>> | error = 0
>> -028|__device_attach(dev = 0xFFFFFF8848951848)
>> | dev = 0xFFFFFF8848951848
>> | async = FALSE
>> | ret = 0
>> | data = (dev = 0xFFFFFF8848951848, check_async = TRUE, want_async =
>> FALSE, have_async = FALSE)
>> -029|device_initial_probe(dev = 0xFFFFFF8848951848)
>> | dev = 0xFFFFFF8848951848
>> -030|bus_probe_device(:dev = 0xFFFFFF8848951848)
>> | dev = 0xFFFFFF8848951848
>> | sp = 0xFFFFFF881ED5C600
>> | sif = 0x0
>> -031|device_add(:dev = 0xFFFFFF8848951848)
>> | dev = 0xFFFFFF8848951848
>> | sp = 0x0
>> | parent = 0xFFFFFF8851B70080
>> | class_intf = 0x0
>> | error = 0
>> | glue_dir = 0x0
>> -032|device_register(dev = 0xFFFFFF8848951848)
>> | dev = 0xFFFFFF8848951848
>> -033|NSX:0x0::0xFFFFFFC07B3E3944(asm)
>> -034|NSX:0x0::0xFFFFFFC07B3E3C20(asm)
>> -035|NSX:0x0::0xFFFFFFC07B6B5148(asm)
>> -036|platform_probe(:_dev = 0xFFFFFF8848956010)
>> | _dev = 0xFFFFFF8848956010
>> | drv = 0xFFFFFFC07B299648
>> | ret = 0
>> -037|call_driver_probe(inline)
>> | dev = 0xFFFFFF8848956010
>> | drv = 0xFFFFFFC07B299678
>> | ret = 0
>> -037|really_probe(:dev = 0xFFFFFF8848956010, :drv = 0xFFFFFFC07B299678)
>> | dev = 0xFFFFFF8848956010
>> | drv = 0xFFFFFFC07B299678
>> | link_ret = 0
>> | test_remove = FALSE
>> -038|__driver_probe_device(drv = 0xFFFFFFC07B299678, :dev =
>> 0xFFFFFF8848956010)
>> | drv = 0xFFFFFFC07B299678
>> | dev = 0xFFFFFF8848956010
>> | ret = 0
>> -039|driver_probe_device(drv = 0xFFFFFFC07B299678, :dev =
>> 0xFFFFFF8848956010)
>> | drv = 0xFFFFFFC07B299678
>> | dev = 0xFFFFFF8848956010
>> | trigger_count = 781
>> | ret = 0
>> -040|__device_attach_driver(drv = 0xFFFFFFC07B299678, :_data =
>> 0xFFFFFFC082143BA8)
>> | drv = 0xFFFFFFC07B299678
>> | _data = 0xFFFFFFC082143BA8
>> | data = 0xFFFFFFC082143BA8
>> | dev = 0xFFFFFF8848956010
>> | ret = ???
>> -041|bus_for_each_drv(bus = ?, :start = 0xFFFFFFC082143BA0, :data =
>> 0xFFFFFFC082143BA8, fn = 0xFFFFFFC08089C798)
>> | data = 0xFFFFFFC082143BA8
>> | fn = 0xFFFFFFC08089C798
>> | i = (i_klist = 0xFFFFFF8804034AC8, i_cur = 0xFFFFFF8821B45068)
>> | sp = 0xFFFFFF8804034A00
>> | error = 0
>> -042|__device_attach(dev = 0xFFFFFF8848956010)
>> | dev = 0xFFFFFF8848956010
>> | async = FALSE
>> | ret = 0
>> | data = (dev = 0xFFFFFF8848956010, check_async = TRUE, want_async =
>> FALSE, have_async = FALSE)
>> -043|device_initial_probe(dev = 0xFFFFFF8848956010)
>> | dev = 0xFFFFFF8848956010
>> -044|bus_probe_device(:dev = 0xFFFFFF8848956010)
>> | dev = 0xFFFFFF8848956010
>> | sp = 0xFFFFFF8804034A00
>> | sif = 0x0
>> -045|device_add(:dev = 0xFFFFFF8848956010)
>> | dev = 0xFFFFFF8848956010
>> | sp = 0x0
>> | parent = 0xFFFFFF8851BCE410
>> | class_intf = 0x0
>> | error = 0
>> | glue_dir = 0x0
>> -046|platform_device_add(pdev = 0xFFFFFF8848956000)
>> | pdev = 0xFFFFFF8848956000
>> -047|NSX:0x0::0xFFFFFFC07B73DD48(asm)
>> -048|process_one_work(:worker = 0xFFFFFF880300AF00, work =
>> 0xFFFFFF8833434930)
>> | worker = 0xFFFFFF880300AF00
>> | work = 0xFFFFFF8833434930
>> | pool = 0xFFFFFF8B7DCAA180
>> | pwq = 0xFFFFFF8B7DCAE600
>> | collision = 0x0
>> | work_data = 18446743573308827141
>> -049|worker_thread(:__worker = 0xFFFFFF880300AF00)
>> | __worker = 0xFFFFFF880300AF00
>> | worker = 0x0
>> | pool = 0xFFFFFF8B7DCAA180
>> -050|kthread(_create = 0xFFFFFF8803290240)
>> | _create = 0xFFFFFF8803290240
>> | param = (sched_priority = 0)
>> | create = 0x0
>> | data = 0xFFFFFF880300AF00
>> | threadfn = 0x0
>> | ret = ???
>> | self = 0xFFFFFF88030D8180
>> | done = 0xFFFFFFC082133CB8
>> -051|ret_from_fork(asm)
>> ---|end of frame
>>
>> -Mukesh