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Signed-off-by: Gautham Ananthakrishna <[email protected]>
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Thank you. I will close and create a new PR |
imran-kn
added a commit
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Feb 3, 2024
…lock. We have ran into situtaions where optimistic spin on sleeping lock by multiple CPUs causes high sys load, which further leads to other issues. This helper allows to check for such spinners. Some examples from a vmcore where system ran into fork-bomb: >>> scan_osq_node(prog) There are spinners on one or more osq_lock CPU(s): [21, 17, 59, 67, 6, 0, 28, 53, 4, 41, 55, 38, 63, 23, 27, 19, 36] are spinning on same osq_lock CPU(s): [42, 56, 35, 18, 22, 3, 1] are spinning on same osq_lock CPU(s): [70, 44, 9] are spinning on same osq_lock CPU(s): [16, 26] are spinning on same osq_lock >>> scan_osq_node(prog,1) There are spinners on one or more osq_lock CPU(s): [21, 17, 59, 67, 6, 0, 28, 53, 4, 41, 55, 38, 63, 23, 27, 19, 36] are spinning on same osq_lock CPU: 21 has been spinning for 1.2 seconds. CPU: 17 has been spinning for 1.3 seconds. CPU: 59 has been spinning for 1.3 seconds. CPU: 67 has been spinning for 1.5 seconds. ....................................... ....................................... CPU: 19 has been spinning for 3.004 seconds. CPU: 36 has been spinning for 3.1 seconds. ...................................... >>> scan_osq_node(prog,2) There are spinners on one or more osq_lock CPU(s): [21, 17, 59, 67, 6, 0, 28, 53, 4, 41, 55, 38, 63, 23, 27, 19, 36] are spinning on same osq_lock CPU: 21 has been spinning for 0.0 seconds. Call stack at cpu: 21 PID: 64691 TASK: ffff8fac01282f80 [R] CPU: 21! COMMAND: "bash" !# 0 [ffffa447d645fb58] node_cpu at 0xffffffff960f3748 kernel/locking/osq_lock.c:27:0 !# 1 [ffffa447d645fb58] osq_lock at 0xffffffff960f3748 kernel/locking/osq_lock.c:143:0 # 2 [ffffa447d645fb68] rwsem_optimistic_spin at 0xffffffff96899cc0 kernel/locking/rwsem-xadd.c:451:0 # 3 [ffffa447d645fb68] __rwsem_down_write_failed_common at 0xffffffff96899cc0 kernel/locking/rwsem-xadd.c:529:0 # 4 [ffffa447d645fb68] rwsem_down_write_failed at 0xffffffff96899cc0 kernel/locking/rwsem-xadd.c:617:0 # 5 [ffffa447d645fbf8] call_rwsem_down_write_failed at 0xffffffff96889537 arch/x86/lib/rwsem.S:117:0 # 6 [ffffa447d645fc40] __down_write at 0xffffffff96898bcd arch/x86/include/asm/rwsem.h:142:0 # 7 [ffffa447d645fc40] down_write at 0xffffffff96898bcd kernel/locking/rwsem.c:72:0 # 8 [ffffa447d645fc58] lock_anon_vma_root at 0xffffffff9623ae3c mm/rmap.c:239:0 # 9 [ffffa447d645fc58] unlink_anon_vmas at 0xffffffff9623ae3c mm/rmap.c:390:0 #10 [ffffa447d645fca8] free_pgtables at 0xffffffff96225231 mm/memory.c:406:0 #11 [ffffa447d645fce8] exit_mmap at 0xffffffff96230f48 mm/mmap.c:3212:0 #12 [ffffa447d645fd98] __mmput at 0xffffffff96097ab2 kernel/fork.c:969:0 #13 [ffffa447d645fd98] mmput at 0xffffffff96097ab2 kernel/fork.c:990:0 #14 [ffffa447d645fdb8] copy_process at 0xffffffff96098801 kernel/fork.c:2058:0 #15 [ffffa447d645fea0] copy_process at 0xffffffff96099db9 kernel/fork.c:1653:0 #16 [ffffa447d645fea0] _do_fork at 0xffffffff96099db9 kernel/fork.c:2153:0 #17 [ffffa447d645ff20] SYSC_clone at 0xffffffff9609a149 kernel/fork.c:2265:0 #18 [ffffa447d645ff20] SyS_clone at 0xffffffff9609a149 kernel/fork.c:2259:0 #19 [ffffa447d645ff30] do_syscall_64 at 0xffffffff96003ca9 arch/x86/entry/common.c:298:0 #20 [ffffa447d645ff58] entry_SYSCALL_64 at 0xffffffff96a001b1 arch/x86/entry/entry_64.S:238:0 ....................................... ....................................... CPU: 36 has been spinning for 3.1 seconds. Call stack at cpu: 36 PID: 16329 TASK: ffff8f85db930000 [R] CPU: 36! COMMAND: bash 0 [ffffa4481243fb68] rwsem_try_write_lock_unqueued at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:364:0 1 [ffffa4481243fb68] rwsem_optimistic_spin at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:465:0 2 [ffffa4481243fb68] __rwsem_down_write_failed_common at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:529:0 3 [ffffa4481243fb68] rwsem_down_write_failed at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:617:0 # 4 [ffffa4481243fbf8] call_rwsem_down_write_failed at 0xffffffff96889537 arch/x86/lib/rwsem.S:117:0 # 5 [ffffa4481243fc40] __down_write at 0xffffffff96898bcd arch/x86/include/asm/rwsem.h:142:0 # 6 [ffffa4481243fc40] down_write at 0xffffffff96898bcd kernel/locking/rwsem.c:72:0 # 7 [ffffa4481243fc58] lock_anon_vma_root at 0xffffffff9623ae3c mm/rmap.c:239:0 # 8 [ffffa4481243fc58] unlink_anon_vmas at 0xffffffff9623ae3c mm/rmap.c:390:0 # 9 [ffffa4481243fca8] free_pgtables at 0xffffffff96225231 mm/memory.c:406:0 #10 [ffffa4481243fce8] exit_mmap at 0xffffffff96230f48 mm/mmap.c:3212:0 #11 [ffffa4481243fd98] __mmput at 0xffffffff96097ab2 kernel/fork.c:969:0 #12 [ffffa4481243fd98] mmput at 0xffffffff96097ab2 kernel/fork.c:990:0 #13 [ffffa4481243fdb8] copy_process at 0xffffffff96098801 kernel/fork.c:2058:0 #14 [ffffa4481243fea0] copy_process at 0xffffffff96099db9 kernel/fork.c:1653:0 #15 [ffffa4481243fea0] _do_fork at 0xffffffff96099db9 kernel/fork.c:2153:0 #16 [ffffa4481243ff20] SYSC_clone at 0xffffffff9609a149 kernel/fork.c:2265:0 #17 [ffffa4481243ff20] SyS_clone at 0xffffffff9609a149 kernel/fork.c:2259:0 #18 [ffffa4481243ff30] do_syscall_64 at 0xffffffff96003ca9 arch/x86/entry/common.c:298:0 #19 [ffffa4481243ff58] entry_SYSCALL_64 at 0xffffffff96a001b1 arch/x86/entry/entry_64.S:238:0 Signed-off-by: Imran Khan <[email protected]>
imran-kn
added a commit
that referenced
this pull request
Mar 14, 2024
…lock(s). We have ran into situtaions where optimistic spin on sleeping lock by multiple CPUs causes high sys load, which further leads to other issues. This helper allows to check for such spinners. Some examples from a vmcore where system ran into fork-bomb: >>> scan_osq_node(prog) There are spinners on one or more osq_lock CPU(s): [21, 17, 59, 67, 6, 0, 28, 53, 4, 41, 55, 38, 63, 23, 27, 19, 36] are spinning on same osq_lock CPU(s): [42, 56, 35, 18, 22, 3, 1] are spinning on same osq_lock CPU(s): [70, 44, 9] are spinning on same osq_lock CPU(s): [16, 26] are spinning on same osq_lock >>> scan_osq_node(prog,1) There are spinners on one or more osq_lock CPU(s): [21, 17, 59, 67, 6, 0, 28, 53, 4, 41, 55, 38, 63, 23, 27, 19, 36] are spinning on same osq_lock CPU: 21 has been spinning for 1.2 seconds. CPU: 17 has been spinning for 1.3 seconds. CPU: 59 has been spinning for 1.3 seconds. CPU: 67 has been spinning for 1.5 seconds. ....................................... ....................................... CPU: 19 has been spinning for 3.004 seconds. CPU: 36 has been spinning for 3.1 seconds. ...................................... >>> scan_osq_node(prog,2) There are spinners on one or more osq_lock CPU(s): [21, 17, 59, 67, 6, 0, 28, 53, 4, 41, 55, 38, 63, 23, 27, 19, 36] are spinning on same osq_lock CPU: 21 has been spinning for 0.0 seconds. Call stack at cpu: 21 PID: 64691 TASK: ffff8fac01282f80 [R] CPU: 21! COMMAND: "bash" !# 0 [ffffa447d645fb58] node_cpu at 0xffffffff960f3748 kernel/locking/osq_lock.c:27:0 !# 1 [ffffa447d645fb58] osq_lock at 0xffffffff960f3748 kernel/locking/osq_lock.c:143:0 # 2 [ffffa447d645fb68] rwsem_optimistic_spin at 0xffffffff96899cc0 kernel/locking/rwsem-xadd.c:451:0 # 3 [ffffa447d645fb68] __rwsem_down_write_failed_common at 0xffffffff96899cc0 kernel/locking/rwsem-xadd.c:529:0 # 4 [ffffa447d645fb68] rwsem_down_write_failed at 0xffffffff96899cc0 kernel/locking/rwsem-xadd.c:617:0 # 5 [ffffa447d645fbf8] call_rwsem_down_write_failed at 0xffffffff96889537 arch/x86/lib/rwsem.S:117:0 # 6 [ffffa447d645fc40] __down_write at 0xffffffff96898bcd arch/x86/include/asm/rwsem.h:142:0 # 7 [ffffa447d645fc40] down_write at 0xffffffff96898bcd kernel/locking/rwsem.c:72:0 # 8 [ffffa447d645fc58] lock_anon_vma_root at 0xffffffff9623ae3c mm/rmap.c:239:0 # 9 [ffffa447d645fc58] unlink_anon_vmas at 0xffffffff9623ae3c mm/rmap.c:390:0 #10 [ffffa447d645fca8] free_pgtables at 0xffffffff96225231 mm/memory.c:406:0 #11 [ffffa447d645fce8] exit_mmap at 0xffffffff96230f48 mm/mmap.c:3212:0 #12 [ffffa447d645fd98] __mmput at 0xffffffff96097ab2 kernel/fork.c:969:0 #13 [ffffa447d645fd98] mmput at 0xffffffff96097ab2 kernel/fork.c:990:0 #14 [ffffa447d645fdb8] copy_process at 0xffffffff96098801 kernel/fork.c:2058:0 #15 [ffffa447d645fea0] copy_process at 0xffffffff96099db9 kernel/fork.c:1653:0 #16 [ffffa447d645fea0] _do_fork at 0xffffffff96099db9 kernel/fork.c:2153:0 #17 [ffffa447d645ff20] SYSC_clone at 0xffffffff9609a149 kernel/fork.c:2265:0 #18 [ffffa447d645ff20] SyS_clone at 0xffffffff9609a149 kernel/fork.c:2259:0 #19 [ffffa447d645ff30] do_syscall_64 at 0xffffffff96003ca9 arch/x86/entry/common.c:298:0 #20 [ffffa447d645ff58] entry_SYSCALL_64 at 0xffffffff96a001b1 arch/x86/entry/entry_64.S:238:0 ....................................... ....................................... CPU: 36 has been spinning for 3.1 seconds. Call stack at cpu: 36 PID: 16329 TASK: ffff8f85db930000 [R] CPU: 36! COMMAND: bash 0 [ffffa4481243fb68] rwsem_try_write_lock_unqueued at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:364:0 1 [ffffa4481243fb68] rwsem_optimistic_spin at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:465:0 2 [ffffa4481243fb68] __rwsem_down_write_failed_common at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:529:0 3 [ffffa4481243fb68] rwsem_down_write_failed at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:617:0 # 4 [ffffa4481243fbf8] call_rwsem_down_write_failed at 0xffffffff96889537 arch/x86/lib/rwsem.S:117:0 # 5 [ffffa4481243fc40] __down_write at 0xffffffff96898bcd arch/x86/include/asm/rwsem.h:142:0 # 6 [ffffa4481243fc40] down_write at 0xffffffff96898bcd kernel/locking/rwsem.c:72:0 # 7 [ffffa4481243fc58] lock_anon_vma_root at 0xffffffff9623ae3c mm/rmap.c:239:0 # 8 [ffffa4481243fc58] unlink_anon_vmas at 0xffffffff9623ae3c mm/rmap.c:390:0 # 9 [ffffa4481243fca8] free_pgtables at 0xffffffff96225231 mm/memory.c:406:0 #10 [ffffa4481243fce8] exit_mmap at 0xffffffff96230f48 mm/mmap.c:3212:0 #11 [ffffa4481243fd98] __mmput at 0xffffffff96097ab2 kernel/fork.c:969:0 #12 [ffffa4481243fd98] mmput at 0xffffffff96097ab2 kernel/fork.c:990:0 #13 [ffffa4481243fdb8] copy_process at 0xffffffff96098801 kernel/fork.c:2058:0 #14 [ffffa4481243fea0] copy_process at 0xffffffff96099db9 kernel/fork.c:1653:0 #15 [ffffa4481243fea0] _do_fork at 0xffffffff96099db9 kernel/fork.c:2153:0 #16 [ffffa4481243ff20] SYSC_clone at 0xffffffff9609a149 kernel/fork.c:2265:0 #17 [ffffa4481243ff20] SyS_clone at 0xffffffff9609a149 kernel/fork.c:2259:0 #18 [ffffa4481243ff30] do_syscall_64 at 0xffffffff96003ca9 arch/x86/entry/common.c:298:0 #19 [ffffa4481243ff58] entry_SYSCALL_64 at 0xffffffff96a001b1 arch/x86/entry/entry_64.S:238:0 Signed-off-by: Imran Khan <[email protected]>
imran-kn
added a commit
that referenced
this pull request
Apr 3, 2024
…lock(s). We have ran into situtaions where optimistic spin on sleeping lock by multiple CPUs causes high sys load, which further leads to other issues. This helper allows to check for such spinners. Some examples from a vmcore where system ran into fork-bomb: >>> scan_osq_node(prog) There are spinners on one or more osq_lock CPU(s): [21, 17, 59, 67, 6, 0, 28, 53, 4, 41, 55, 38, 63, 23, 27, 19, 36] are spinning on same osq_lock CPU(s): [42, 56, 35, 18, 22, 3, 1] are spinning on same osq_lock CPU(s): [70, 44, 9] are spinning on same osq_lock CPU(s): [16, 26] are spinning on same osq_lock >>> scan_osq_node(prog,1) There are spinners on one or more osq_lock CPU(s): [21, 17, 59, 67, 6, 0, 28, 53, 4, 41, 55, 38, 63, 23, 27, 19, 36] are spinning on same osq_lock CPU: 21 has been spinning for 1.2 seconds. CPU: 17 has been spinning for 1.3 seconds. CPU: 59 has been spinning for 1.3 seconds. CPU: 67 has been spinning for 1.5 seconds. ....................................... ....................................... CPU: 19 has been spinning for 3.004 seconds. CPU: 36 has been spinning for 3.1 seconds. ...................................... >>> scan_osq_node(prog,2) There are spinners on one or more osq_lock CPU(s): [21, 17, 59, 67, 6, 0, 28, 53, 4, 41, 55, 38, 63, 23, 27, 19, 36] are spinning on same osq_lock CPU: 21 has been spinning for 0.0 seconds. Call stack at cpu: 21 PID: 64691 TASK: ffff8fac01282f80 [R] CPU: 21! COMMAND: "bash" !# 0 [ffffa447d645fb58] node_cpu at 0xffffffff960f3748 kernel/locking/osq_lock.c:27:0 !# 1 [ffffa447d645fb58] osq_lock at 0xffffffff960f3748 kernel/locking/osq_lock.c:143:0 # 2 [ffffa447d645fb68] rwsem_optimistic_spin at 0xffffffff96899cc0 kernel/locking/rwsem-xadd.c:451:0 # 3 [ffffa447d645fb68] __rwsem_down_write_failed_common at 0xffffffff96899cc0 kernel/locking/rwsem-xadd.c:529:0 # 4 [ffffa447d645fb68] rwsem_down_write_failed at 0xffffffff96899cc0 kernel/locking/rwsem-xadd.c:617:0 # 5 [ffffa447d645fbf8] call_rwsem_down_write_failed at 0xffffffff96889537 arch/x86/lib/rwsem.S:117:0 # 6 [ffffa447d645fc40] __down_write at 0xffffffff96898bcd arch/x86/include/asm/rwsem.h:142:0 # 7 [ffffa447d645fc40] down_write at 0xffffffff96898bcd kernel/locking/rwsem.c:72:0 # 8 [ffffa447d645fc58] lock_anon_vma_root at 0xffffffff9623ae3c mm/rmap.c:239:0 # 9 [ffffa447d645fc58] unlink_anon_vmas at 0xffffffff9623ae3c mm/rmap.c:390:0 #10 [ffffa447d645fca8] free_pgtables at 0xffffffff96225231 mm/memory.c:406:0 #11 [ffffa447d645fce8] exit_mmap at 0xffffffff96230f48 mm/mmap.c:3212:0 #12 [ffffa447d645fd98] __mmput at 0xffffffff96097ab2 kernel/fork.c:969:0 #13 [ffffa447d645fd98] mmput at 0xffffffff96097ab2 kernel/fork.c:990:0 #14 [ffffa447d645fdb8] copy_process at 0xffffffff96098801 kernel/fork.c:2058:0 #15 [ffffa447d645fea0] copy_process at 0xffffffff96099db9 kernel/fork.c:1653:0 #16 [ffffa447d645fea0] _do_fork at 0xffffffff96099db9 kernel/fork.c:2153:0 #17 [ffffa447d645ff20] SYSC_clone at 0xffffffff9609a149 kernel/fork.c:2265:0 #18 [ffffa447d645ff20] SyS_clone at 0xffffffff9609a149 kernel/fork.c:2259:0 #19 [ffffa447d645ff30] do_syscall_64 at 0xffffffff96003ca9 arch/x86/entry/common.c:298:0 #20 [ffffa447d645ff58] entry_SYSCALL_64 at 0xffffffff96a001b1 arch/x86/entry/entry_64.S:238:0 ....................................... ....................................... CPU: 36 has been spinning for 3.1 seconds. Call stack at cpu: 36 PID: 16329 TASK: ffff8f85db930000 [R] CPU: 36! COMMAND: bash 0 [ffffa4481243fb68] rwsem_try_write_lock_unqueued at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:364:0 1 [ffffa4481243fb68] rwsem_optimistic_spin at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:465:0 2 [ffffa4481243fb68] __rwsem_down_write_failed_common at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:529:0 3 [ffffa4481243fb68] rwsem_down_write_failed at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:617:0 # 4 [ffffa4481243fbf8] call_rwsem_down_write_failed at 0xffffffff96889537 arch/x86/lib/rwsem.S:117:0 # 5 [ffffa4481243fc40] __down_write at 0xffffffff96898bcd arch/x86/include/asm/rwsem.h:142:0 # 6 [ffffa4481243fc40] down_write at 0xffffffff96898bcd kernel/locking/rwsem.c:72:0 # 7 [ffffa4481243fc58] lock_anon_vma_root at 0xffffffff9623ae3c mm/rmap.c:239:0 # 8 [ffffa4481243fc58] unlink_anon_vmas at 0xffffffff9623ae3c mm/rmap.c:390:0 # 9 [ffffa4481243fca8] free_pgtables at 0xffffffff96225231 mm/memory.c:406:0 #10 [ffffa4481243fce8] exit_mmap at 0xffffffff96230f48 mm/mmap.c:3212:0 #11 [ffffa4481243fd98] __mmput at 0xffffffff96097ab2 kernel/fork.c:969:0 #12 [ffffa4481243fd98] mmput at 0xffffffff96097ab2 kernel/fork.c:990:0 #13 [ffffa4481243fdb8] copy_process at 0xffffffff96098801 kernel/fork.c:2058:0 #14 [ffffa4481243fea0] copy_process at 0xffffffff96099db9 kernel/fork.c:1653:0 #15 [ffffa4481243fea0] _do_fork at 0xffffffff96099db9 kernel/fork.c:2153:0 #16 [ffffa4481243ff20] SYSC_clone at 0xffffffff9609a149 kernel/fork.c:2265:0 #17 [ffffa4481243ff20] SyS_clone at 0xffffffff9609a149 kernel/fork.c:2259:0 #18 [ffffa4481243ff30] do_syscall_64 at 0xffffffff96003ca9 arch/x86/entry/common.c:298:0 #19 [ffffa4481243ff58] entry_SYSCALL_64 at 0xffffffff96a001b1 arch/x86/entry/entry_64.S:238:0 Signed-off-by: Imran Khan <[email protected]> Conflicts: drgn_tools/lock.py
brenns10
pushed a commit
that referenced
this pull request
Apr 4, 2024
…lock(s). We have ran into situtaions where optimistic spin on sleeping lock by multiple CPUs causes high sys load, which further leads to other issues. This helper allows to check for such spinners. Some examples from a vmcore where system ran into fork-bomb: >>> scan_osq_node(prog) There are spinners on one or more osq_lock CPU(s): [21, 17, 59, 67, 6, 0, 28, 53, 4, 41, 55, 38, 63, 23, 27, 19, 36] are spinning on same osq_lock CPU(s): [42, 56, 35, 18, 22, 3, 1] are spinning on same osq_lock CPU(s): [70, 44, 9] are spinning on same osq_lock CPU(s): [16, 26] are spinning on same osq_lock >>> scan_osq_node(prog,1) There are spinners on one or more osq_lock CPU(s): [21, 17, 59, 67, 6, 0, 28, 53, 4, 41, 55, 38, 63, 23, 27, 19, 36] are spinning on same osq_lock CPU: 21 has been spinning for 1.2 seconds. CPU: 17 has been spinning for 1.3 seconds. CPU: 59 has been spinning for 1.3 seconds. CPU: 67 has been spinning for 1.5 seconds. ....................................... ....................................... CPU: 19 has been spinning for 3.004 seconds. CPU: 36 has been spinning for 3.1 seconds. ...................................... >>> scan_osq_node(prog,2) There are spinners on one or more osq_lock CPU(s): [21, 17, 59, 67, 6, 0, 28, 53, 4, 41, 55, 38, 63, 23, 27, 19, 36] are spinning on same osq_lock CPU: 21 has been spinning for 0.0 seconds. Call stack at cpu: 21 PID: 64691 TASK: ffff8fac01282f80 [R] CPU: 21! COMMAND: "bash" !# 0 [ffffa447d645fb58] node_cpu at 0xffffffff960f3748 kernel/locking/osq_lock.c:27:0 !# 1 [ffffa447d645fb58] osq_lock at 0xffffffff960f3748 kernel/locking/osq_lock.c:143:0 # 2 [ffffa447d645fb68] rwsem_optimistic_spin at 0xffffffff96899cc0 kernel/locking/rwsem-xadd.c:451:0 # 3 [ffffa447d645fb68] __rwsem_down_write_failed_common at 0xffffffff96899cc0 kernel/locking/rwsem-xadd.c:529:0 # 4 [ffffa447d645fb68] rwsem_down_write_failed at 0xffffffff96899cc0 kernel/locking/rwsem-xadd.c:617:0 # 5 [ffffa447d645fbf8] call_rwsem_down_write_failed at 0xffffffff96889537 arch/x86/lib/rwsem.S:117:0 # 6 [ffffa447d645fc40] __down_write at 0xffffffff96898bcd arch/x86/include/asm/rwsem.h:142:0 # 7 [ffffa447d645fc40] down_write at 0xffffffff96898bcd kernel/locking/rwsem.c:72:0 # 8 [ffffa447d645fc58] lock_anon_vma_root at 0xffffffff9623ae3c mm/rmap.c:239:0 # 9 [ffffa447d645fc58] unlink_anon_vmas at 0xffffffff9623ae3c mm/rmap.c:390:0 #10 [ffffa447d645fca8] free_pgtables at 0xffffffff96225231 mm/memory.c:406:0 #11 [ffffa447d645fce8] exit_mmap at 0xffffffff96230f48 mm/mmap.c:3212:0 #12 [ffffa447d645fd98] __mmput at 0xffffffff96097ab2 kernel/fork.c:969:0 #13 [ffffa447d645fd98] mmput at 0xffffffff96097ab2 kernel/fork.c:990:0 #14 [ffffa447d645fdb8] copy_process at 0xffffffff96098801 kernel/fork.c:2058:0 #15 [ffffa447d645fea0] copy_process at 0xffffffff96099db9 kernel/fork.c:1653:0 #16 [ffffa447d645fea0] _do_fork at 0xffffffff96099db9 kernel/fork.c:2153:0 #17 [ffffa447d645ff20] SYSC_clone at 0xffffffff9609a149 kernel/fork.c:2265:0 #18 [ffffa447d645ff20] SyS_clone at 0xffffffff9609a149 kernel/fork.c:2259:0 #19 [ffffa447d645ff30] do_syscall_64 at 0xffffffff96003ca9 arch/x86/entry/common.c:298:0 #20 [ffffa447d645ff58] entry_SYSCALL_64 at 0xffffffff96a001b1 arch/x86/entry/entry_64.S:238:0 ....................................... ....................................... CPU: 36 has been spinning for 3.1 seconds. Call stack at cpu: 36 PID: 16329 TASK: ffff8f85db930000 [R] CPU: 36! COMMAND: bash 0 [ffffa4481243fb68] rwsem_try_write_lock_unqueued at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:364:0 1 [ffffa4481243fb68] rwsem_optimistic_spin at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:465:0 2 [ffffa4481243fb68] __rwsem_down_write_failed_common at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:529:0 3 [ffffa4481243fb68] rwsem_down_write_failed at 0xffffffff96899d00 kernel/locking/rwsem-xadd.c:617:0 # 4 [ffffa4481243fbf8] call_rwsem_down_write_failed at 0xffffffff96889537 arch/x86/lib/rwsem.S:117:0 # 5 [ffffa4481243fc40] __down_write at 0xffffffff96898bcd arch/x86/include/asm/rwsem.h:142:0 # 6 [ffffa4481243fc40] down_write at 0xffffffff96898bcd kernel/locking/rwsem.c:72:0 # 7 [ffffa4481243fc58] lock_anon_vma_root at 0xffffffff9623ae3c mm/rmap.c:239:0 # 8 [ffffa4481243fc58] unlink_anon_vmas at 0xffffffff9623ae3c mm/rmap.c:390:0 # 9 [ffffa4481243fca8] free_pgtables at 0xffffffff96225231 mm/memory.c:406:0 #10 [ffffa4481243fce8] exit_mmap at 0xffffffff96230f48 mm/mmap.c:3212:0 #11 [ffffa4481243fd98] __mmput at 0xffffffff96097ab2 kernel/fork.c:969:0 #12 [ffffa4481243fd98] mmput at 0xffffffff96097ab2 kernel/fork.c:990:0 #13 [ffffa4481243fdb8] copy_process at 0xffffffff96098801 kernel/fork.c:2058:0 #14 [ffffa4481243fea0] copy_process at 0xffffffff96099db9 kernel/fork.c:1653:0 #15 [ffffa4481243fea0] _do_fork at 0xffffffff96099db9 kernel/fork.c:2153:0 #16 [ffffa4481243ff20] SYSC_clone at 0xffffffff9609a149 kernel/fork.c:2265:0 #17 [ffffa4481243ff20] SyS_clone at 0xffffffff9609a149 kernel/fork.c:2259:0 #18 [ffffa4481243ff30] do_syscall_64 at 0xffffffff96003ca9 arch/x86/entry/common.c:298:0 #19 [ffffa4481243ff58] entry_SYSCALL_64 at 0xffffffff96a001b1 arch/x86/entry/entry_64.S:238:0 Signed-off-by: Imran Khan <[email protected]> Conflicts: drgn_tools/lock.py
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Added mounts corelens module to list and display all mount points from a vmcore.