Hi,
I noticed some nfs dead lock on linux 5.10.76
[ 514.916512] sysrq: Show Blocked State
[ 514.921552] task:bash state:D stack: 0 pid: 2674 ppid: 1 flags:0x00004004
[ 514.930900] Call Trace:
[ 514.933645] __schedule+0x278/0x730
[ 514.937554] ? add_timer+0x146/0x200
[ 514.941604] ? __rpc_wait_for_completion_task+0x30/0x30 [sunrpc]
[ 514.948326] schedule+0x3c/0xa0
[ 514.951855] rpc_wait_bit_killable+0x1e/0x90 [sunrpc]
[ 514.957511] __wait_on_bit+0x2c/0x90
[ 514.961525] ? rpc_wake_up_task_on_wq_queue_action_locked+0x230/0x230 [sunrpc]
[ 514.969608] out_of_line_wait_on_bit+0x91/0xb0
[ 514.974584] ? var_wake_function+0x20/0x20
[ 514.979182] __rpc_execute+0x101/0x3e0 [sunrpc]
[ 514.984269] rpc_execute+0xa2/0xc0 [sunrpc]
[ 514.988959] rpc_run_task+0x153/0x170 [sunrpc]
[ 514.993955] nfs4_call_sync_custom+0xb/0x30 [nfsv4]
[ 514.999410] nfs4_do_call_sync+0x69/0x90 [nfsv4]
[ 515.004583] _nfs4_proc_readdir+0x21a/0x290 [nfsv4]
[ 515.010053] ? nfs4_do_check_delegation+0x35/0x40 [nfsv4]
[ 515.016102] nfs4_proc_readdir+0x7f/0x110 [nfsv4]
[ 515.021376] ? nfs4_proc_symlink+0x1d0/0x1d0 [nfsv4]
[ 515.027483] nfs_readdir_xdr_to_array+0x1b4/0x430 [nfs]
[ 515.033868] ? xas_store+0x56/0x610
[ 515.038303] ? __add_to_page_cache_locked+0x1d3/0x4c0
[ 515.044488] nfs_readdir_filler+0x1b/0xa0 [nfs]
[ 515.050064] do_read_cache_page+0x3e3/0x8a0
[ 515.055247] ? nfs_readdir_xdr_to_array+0x430/0x430 [nfs]
[ 515.061793] ? nfs4_do_check_delegation+0x35/0x40 [nfsv4]
[ 515.068332] ? nfs_check_cache_invalid+0x33/0x90 [nfs]
[ 515.074585] nfs_readdir+0x202/0x750 [nfs]
[ 515.079679] iterate_dir+0x15d/0x1a0
[ 515.084170] __x64_sys_getdents+0x81/0x120
[ 515.089237] ? compat_fillonedir+0x150/0x150
[ 515.094500] do_syscall_64+0x33/0x40
[ 515.098979] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 515.105101] RIP: 0033:0x7f4131155425
[ 515.109565] RSP: 002b:00007ffc60c1e5a0 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
[ 515.118486] RAX: ffffffffffffffda RBX: 0000000000a6c4a0 RCX: 00007f4131155425
[ 515.126919] RDX: 0000000000008000 RSI: 0000000000a6c4a0 RDI: 0000000000000003
[ 515.135350] RBP: 0000000000a6c4a0 R08: 0000000000000000 R09: 0000000000008030
[ 515.143765] R10: 0000000000000076 R11: 0000000000000246 R12: ffffffffffffff70
[ 515.152172] R13: 0000000000000000 R14: 00000000004bb632 R15: 000000000000004c
[ 515.160603] task:bash state:D stack: 0 pid: 2855 ppid: 1 flags:0x00000004
[ 515.170371] Call Trace:
[ 515.173539] __schedule+0x278/0x730
[ 515.177870] schedule+0x3c/0xa0
[ 515.181801] io_schedule+0x12/0x40
[ 515.186030] do_read_cache_page+0x19e/0x8a0
[ 515.191141] ? nfs_readdir_xdr_to_array+0x430/0x430 [nfs]
[ 515.197600] ? generic_file_readonly_mmap+0x70/0x70
[ 515.203478] nfs_readdir+0x202/0x750 [nfs]
[ 515.208476] iterate_dir+0x15d/0x1a0
[ 515.212885] __x64_sys_getdents+0x81/0x120
[ 515.217881] ? compat_fillonedir+0x150/0x150
[ 515.223069] do_syscall_64+0x33/0x40
[ 515.227479] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 515.233537] RIP: 0033:0x7f75ad32a425
[ 515.237940] RSP: 002b:00007ffed83e0600 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
[ 515.246814] RAX: ffffffffffffffda RBX: 000000000199c310 RCX: 00007f75ad32a425
[ 515.255205] RDX: 0000000000008000 RSI: 000000000199c310 RDI: 0000000000000003
[ 515.263599] RBP: 000000000199c310 R08: 0000000000000000 R09: 0000000000008030
[ 515.271991] R10: 0000000000000076 R11: 0000000000000246 R12: ffffffffffffff70
[ 515.280384] R13: 0000000000000000 R14: 00000000004bb632 R15: 000000000000004c
[ 515.288777] task:bash state:D stack: 0 pid: 2992 ppid: 1 flags:0x00000004
[ 515.298538] Call Trace:
[ 515.301698] __schedule+0x278/0x730
[ 515.306021] schedule+0x3c/0xa0
[ 515.309952] io_schedule+0x12/0x40
[ 515.314169] do_read_cache_page+0x19e/0x8a0
[ 515.319267] ? nfs_readdir_xdr_to_array+0x430/0x430 [nfs]
[ 515.325717] ? generic_file_readonly_mmap+0x70/0x70
[ 515.331592] nfs_readdir+0x202/0x750 [nfs]
[ 515.336586] iterate_dir+0x15d/0x1a0
[ 515.340994] __x64_sys_getdents+0x81/0x120
[ 515.345973] ? compat_fillonedir+0x150/0x150
[ 515.351157] do_syscall_64+0x33/0x40
[ 515.355561] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 515.361615] RIP: 0033:0x7fe632c64425
[ 515.366021] RSP: 002b:00007fff9f505d90 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
[ 515.374904] RAX: ffffffffffffffda RBX: 0000000002348020 RCX: 00007fe632c64425
[ 515.383308] RDX: 0000000000008000 RSI: 0000000002348020 RDI: 0000000000000003
[ 515.391711] RBP: 0000000002348020 R08: 0000000000000000 R09: 0000000000008030
[ 515.400112] R10: 0000000000000076 R11: 0000000000000246 R12: ffffffffffffff70
[ 515.408502] R13: 0000000000000000 R14: 00000000004bb632 R15: 000000000000004c
Best Regards
Wang Yugui ([email protected])
2021/10/30