Hi, I've got the following panic running FreeBSD-11-current: panic: sleepq_add: td 0xc128a330 to sleep on wchan 0xc1bdd080 with sleeping prohibited After some digging, the call stack is the following: ... g_io_schedule_up() biodone() swapgeom_done() g_waitfor_event() _sleep() ... As biodone() in g_io_schedule_up() is wrapped by THREAD_NO_SLEEPING() and THREAD_SLEEPING_OK(), IMHO, there is something missing in code as _sleep() can be called regularly in this case. Svatopluk Kraus ----------------------------------------- More info about this is bellow: root_at_raspberry-pi:/usr/src/src2 # ~~~(da0:umass-sim0:0:0:0): READ(10). CDB: 28 00 00 12 1c 50 00 00 18 00 (da0:umass-sim0:0:0:0): CAM status: SCSI Status Error (da0:umass-sim0:0:0:0): SCSI status: Check Condition (da0:umass-sim0:0:0:0): SCSI sense: UNIT ATTENTION asc:28,0 (Not ready to ready change, medium may have changed) (da0:umass-sim0:0:0:0): Retrying command (per sense data) (da0:umass-sim0:0:0:0): READ(10). CDB: 28 00 00 12 1c 50 00 00 18 00 (da0:umass-sim0:0:0:0): CAM status: SCSI Status Error (da0:umass-sim0:0:0:0): SCSI status: Check Condition (da0:umass-sim0:0:0:0): SCSI sense: UNIT ATTENTION asc:28,0 (Not ready to ready change, medium may have changed) (da0:umass-sim0:0:0:0): Retrying command (per sense data) (da0:umass-sim0:0:0:0): READ(10). CDB: 28 00 00 12 1c 50 00 00 18 00 (da0:umass-sim0:0:0:0): CAM status: SCSI Status Error (da0:umass-sim0:0:0:0): SCSI status: Check Condition (da0:umass-sim0:0:0:0): SCSI sense: UNIT ATTENTION asc:28,0 (Not ready to ready change, medium may have changed) (da0:umass-sim0:0:0:0): Retrying command (per sense data) (da0:umass-sim0:0:0:0): READ(10). CDB: 28 00 00 12 1c 50 00 00 18 00 (da0:umass-sim0:0:0:0): CAM status: SCSI Status Error (da0:umass-sim0:0:0:0): SCSI status: Check Condition (da0:umass-sim0:0:0:0): SCSI sense: UNIT ATTENTION asc:28,0 (Not ready to ready change, medium may have changed) (da0:umass-sim0:0:0:0): Retrying command (per sense data) (da0:umass-sim0:0:0:0): READ(10). CDB: 28 00 00 12 1c 50 00 00 18 00 (da0:umass-sim0:0:0:0): CAM status: SCSI Status Error (da0:umass-sim0:0:0:0): SCSI status: Check Condition (da0:umass-sim0:0:0:0): SCSI sense: UNIT ATTENTION asc:28,0 (Not ready to ready change, medium may have changed) (da0:umass-sim0:0:0:0): Error 6, Retries exhausted (da0:umass-sim0:0:0:0): Invalidating pack g_vfs_done():da0s1a[READ(offset=606642176, length=12288)]error = 6 vnode_pager_generic_getpages_done: I/O read error 5 vm_fault: pager read error, pid 327 (dhclient) pid 327 (dhclient), uid 65: exited on signal 11 swap_pager: I/O error - pagein failed; blkno 57953,size 4096, error 6 panic: sleepq_add: td 0xc128a330 to sleep on wchan 0xc1bdd080 with sleeping prohibited KDB: enter: panic [ thread pid 12 tid 100007 ] Stopped at kdb_enter+0x48: ldrb r15, [r15, r15, ror r15]! db> bt Tracing pid 12 tid 100007 td 0xc128a330 db_trace_self() at db_trace_self pc = 0xc04ee7cc lr = 0xc0131f90 (db_hex2dec+0x4c0) sp = 0xcfec2970 fp = 0xcfec2988 r10 = 0xc070f6f8 db_hex2dec() at db_hex2dec+0x4c0 pc = 0xc0131f90 lr = 0xc01319dc (db_command_loop+0x3c4) sp = 0xcfec2990 fp = 0xcfec2a30 r4 = 0x00000000 r5 = 0x00000000 r6 = 0x00000000 r10 = 0xc070f6f8 db_command_loop() at db_command_loop+0x3c4 pc = 0xc01319dc lr = 0xc0131674 (db_command_loop+0x5c) sp = 0xcfec2a38 fp = 0xcfec2a48 r4 = 0xc054916d r5 = 0xc0569f39 r6 = 0xc070f6e4 r7 = 0xc0622154 r8 = 0xc07079b0 r9 = 0xc07079b4 r10 = 0xcfec2c10 db_command_loop() at db_command_loop+0x5c pc = 0xc0131674 lr = 0xc01340c0 (db_fetch_ksymtab+0x298) sp = 0xcfec2a50 fp = 0xcfec2b68 r4 = 0x00000000 r5 = 0xc070f6f0 r6 = 0xc07079d8 r10 = 0xcfec2c10 db_fetch_ksymtab() at db_fetch_ksymtab+0x298 pc = 0xc01340c0 lr = 0xc02d2eb8 (kdb_trap+0xbc) sp = 0xcfec2b70 fp = 0xcfec2b90 r4 = 0x00000000 r5 = 0x00000001 r6 = 0xc07079d8 r7 = 0xc0622154 kdb_trap() at kdb_trap+0xbc pc = 0xc02d2eb8 lr = 0xc0505a08 (undefinedinstruction+0x2b4) sp = 0xcfec2b98 fp = 0xcfec2c08 r4 = 0x00000000 r5 = 0x00000000 r6 = 0xc05056a4 r7 = 0xe7ffffff r8 = 0xc128a330 r9 = 0xc02d27b0 r10 = 0xcfec2c10 undefinedinstruction() at undefinedinstruction+0x2b4 pc = 0xc0505a08 lr = 0xc04efe38 (exception_exit) sp = 0xcfec2c10 fp = 0xcfec2ca8 r4 = 0xc0569f8e r5 = 0xcfec2cfc r6 = 0xc056f664 r7 = 0xc06f9f18 r8 = 0xc128a330 r9 = 0xc0710e50 r10 = 0xc06f9d80 exception_exit() at exception_exit pc = 0xc04efe38 lr = 0xc02d27a4 (kdb_enter+0x3c) sp = 0xcfec2ca0 fp = 0xcfec2ca8 r0 = 0xc07079c4 r1 = 0x00000000 r2 = 0xc056dc29 r3 = 0xc056d86c r4 = 0xc0569f8e r5 = 0xcfec2cfc r6 = 0xc056f664 r7 = 0xc06f9f18 r8 = 0xc128a330 r9 = 0xc0710e50 r10 = 0xc06f9d80 r12 = 0x00000000 kdb_enter() at kdb_enter+0x4c pc = 0xc02d27b4 lr = 0xc02994d4 (kassert_panic+0x1c8) sp = 0xcfec2cb0 fp = 0xcfec2cd0 r4 = 0x00000100 r10 = 0xc06f9d80 kassert_panic() at kassert_panic+0x1c8 pc = 0xc02994d4 lr = 0xc0299410 (kassert_panic+0x104) sp = 0xcfec2cd8 fp = 0xcfec2cf0 r4 = 0xc06f9e18 r5 = 0xc056f664 r6 = 0xcfec2cfc r7 = 0xc06f9d80 r8 = 0x00000050 r9 = 0xc0707c68 r10 = 0xc06f7d78 kassert_panic() at kassert_panic+0x104 pc = 0xc0299410 lr = 0xc02e475c (sleepq_add+0x2d4) sp = 0xcfec2d08 fp = 0xcfec2d30 r4 = 0xc07083fc r5 = 0xc128a330 r6 = 0x00000000 r7 = 0xc1bdd080 sleepq_add() at sleepq_add+0x2d4 pc = 0xc02e475c lr = 0xc02a2374 (_sleep+0x27c) sp = 0xcfec2d38 fp = 0xcfec2d80 r4 = 0xc0710d40 r5 = 0xc0710d40 r6 = 0xc1bdd080 r7 = 0xffffffa0 r8 = 0x00000000 r9 = 0x00000000 r10 = 0xc06f7d78 _sleep() at _sleep+0x27c pc = 0xc02a2374 lr = 0xc022badc (g_waitfor_event+0xf0) sp = 0xcfec2d88 fp = 0xcfec2dc8 r4 = 0xffffffa0 r5 = 0xc06f7d78 r6 = 0x00000000 r7 = 0x00000000 r8 = 0x00040000 r9 = 0x00000100 r10 = 0xc055e43c g_waitfor_event() at g_waitfor_event+0xf0 pc = 0xc022badc lr = 0xc04ba12c (vmspace_swap_count+0x8d0) sp = 0xcfec2dd8 fp = 0xcfec2de8 r4 = 0xc21525e8 r5 = 0xc178fd40 r6 = 0xc070df80 r7 = 0xc06f7dd4 r8 = 0xc0710378 r9 = 0xc055c18b r10 = 0x00000000 vmspace_swap_count() at vmspace_swap_count+0x8d0 pc = 0xc04ba12c lr = 0xc022d000 (g_io_schedule_up+0xd4) sp = 0xcfec2df0 fp = 0xcfec2e20 r4 = 0xc055e63f r5 = 0xc21525e8 r6 = 0xc06f7d90 r10 = 0x00000000 g_io_schedule_up() at g_io_schedule_up+0xd4 pc = 0xc022d000 lr = 0xc022d738 (g_init+0x220) sp = 0xcfec2e28 fp = 0xcfec2e30 r4 = 0xc055ea78 r5 = 0xc06f7dfc r6 = 0xc022d6cc r7 = 0x00000000 r8 = 0xcfec2e58 r9 = 0x00000000 r10 = 0x00000000 g_init() at g_init+0x220 pc = 0xc022d738 lr = 0xc02678a0 (fork_exit+0x7c) sp = 0xcfec2e38 fp = 0xcfec2e50 r4 = 0xc128a330 r5 = 0xc1287378 fork_exit() at fork_exit+0x7c pc = 0xc02678a0 lr = 0xc04efdc8 (swi_exit) sp = 0xcfec2e58 fp = 0x00000000 r4 = 0xc022d6cc r5 = 0x00000000 r6 = 0x00000000 r7 = 0x00000000 r8 = 0x00000000 r10 = 0x00000000 swi_exit() at swi_exit pc = 0xc04efdc8 lr = 0xc04efdc8 (swi_exit) sp = 0xcfec2e58 fp = 0x00000000 db> show thread 0xc128a330 Thread 100007 at 0xc128a330: proc (pid 12): 0xc1287378 name: g_up stack: 0xcfec1000-0xcfec2fff flags: 0x1010004 pflags: 0x210000 state: RUNNING (CPU 0) priority: 92 container lock: sched lock (0xc0707554)Received on Tue Apr 07 2015 - 07:38:23 UTC
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