"Andriy Gapon" <a...@freebsd.org> wrote: > I've got curious about this while looking into what appears to be a > FreeBSD-specific deadlock: > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203864#c13
Here's another spa_namespace_lock-related deadlock:
6 102135 zfskern txg_thread_enter mi_switch+0xde sleepq_wait+0x3a
_cv_wait+0x1a6 zio_wait+0x89 dsl_pool_sync+0x12e spa_sync+0x51f
txg_sync_thread+0x408 fork_exit+0x9a fork_trampoline+0xe
5985 101966 zpool - mi_switch+0xde sleepq_wait+0x3a
_sx_xlock_hard+0x540 _sx_xlock+0x5d spa_get_errlog_size+0x3a
spa_get_stats+0x116 zfs_ioc_pool_stats+0x4c zfsdev_ioctl+0xc68
devfs_ioctl_f+0x13b kern_ioctl+0x401 sys_ioctl+0x153
amd64_syscall+0x3e7 Xfast_syscall+0xfb
6863 101673 zpool - mi_switch+0xde sleepq_wait+0x3a
_cv_wait+0x1a6 zio_wait+0x89 dbuf_read+0x464 dmu_buf_hold+0x9a
zap_get_leaf_byblk+0x76 zap_deref_leaf+0xc6
fzap_cursor_retrieve+0x169 zap_cursor_retrieve+0x216
process_error_log+0xb1 spa_get_errlog+0xae zfs_ioc_error_log+0x70
zfsdev_ioctl+0xc68 devfs_ioctl_f+0x13b kern_ioctl+0x401
sys_ioctl+0x153 amd64_syscall+0x3e7
6885 100784 zpool - mi_switch+0xde sleepq_wait+0x3a
_sx_xlock_hard+0x540 _sx_xlock+0x5d spa_get_errlog_size+0x3a
spa_get_stats+0x116 zfs_ioc_pool_stats+0x4c zfsdev_ioctl+0xc68
devfs_ioctl_f+0x13b kern_ioctl+0x401 sys_ioctl+0x153
amd64_syscall+0x3e7 Xfast_syscall+0xfb
Details at:
https://lists.freebsd.org/pipermail/freebsd-current/2015-October/057988.html
Fabian
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