[Bug 194513] zfs recv hangs in state kmem arena

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Wed Nov 5 17:14:05 UTC 2014


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194513

--- Comment #3 from James Van Artsdalen <james-freebug at jrv.org> ---
Created attachment 149075
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=149075&action=edit
procstat -kk -a


The same systems hang the same way on "zpool history", although the  attached
EATMEM does  not seem tp help.  Attached is the full "procstat -kk -a" output
with a "zpool history" stuck.

SUPERTEX:/root# uname -a
FreeBSD SUPERTEX.housenet.jrv 10.1-PRERELEASE FreeBSD 10.1-PRERELEASE #3
r273476M: Wed Oct 22 15:05:29 CDT 2014    
root at SUPERTEX.housenet.jrv:/usr/obj/usr/src/sys/GENERIC  amd64
SUPERTEX:/root# procstat -kk -a > kk
SUPERTEX:/root# grep zio_wait kk
SUPERTEX:/root# grep zio_done kk
SUPERTEX:/root# grep zio_int kk
SUPERTEX:/root# grep zfs_ kk
    0 100475 kernel           zfs_vn_rele_task mi_switch+0xe1
sleepq_wait+0x3a _sleep+0x287 taskqueue_thread_loop+0xd5 fork_exit+0x9a
fork_trampoline+0xe
    0 101018 kernel           zfs_vn_rele_task mi_switch+0xe1
sleepq_wait+0x3a _sleep+0x287 taskqueue_thread_loop+0xd5 fork_exit+0x9a
fork_trampoline+0xe
    0 101522 kernel           zfs_vn_rele_task mi_switch+0xe1
sleepq_wait+0x3a _sleep+0x287 taskqueue_thread_loop+0xd5 fork_exit+0x9a
fork_trampoline+0xe
12105 101599 zpool            -                mi_switch+0xe1
sleepq_wait+0x3a _cv_wait+0x16d vmem_xalloc+0x568 vmem_alloc+0x3d
kmem_malloc+0x33 uma_large_malloc+0x49 malloc+0x43
zfs_ioc_pool_get_history+0xbd zfsdev_ioctl+0x5ca devfs_ioctl_f+0x139
kern_ioctl+0x255 sys_ioctl+0x13c amd64_syscall+0x351 Xfast_syscall+0xfb
SUPERTEX:/root# grep dmu_ kk
SUPERTEX:/root# grep arc_ kk
    3 100125 zfskern          arc_reclaim_thre mi_switch+0xe1
sleepq_timedwait+0x3a _cv_timedwait_sbt+0x18b arc_reclaim_thread+0x288
fork_exit+0x9a fork_trampoline+0xe
    3 100126 zfskern          l2arc_feed_threa mi_switch+0xe1
sleepq_timedwait+0x3a _cv_timedwait_sbt+0x18b l2arc_feed_thread+0x19f
fork_exit+0x9a fork_trampoline+0xe
SUPERTEX:/root# grep buf_ kk
   20 100139 bufdaemon        -                mi_switch+0xe1
sleepq_timedwait+0x3a _sleep+0x26e buf_daemon+0x78 fork_exit+0x9a
fork_trampoline+0xe
SUPERTEX:/root# ps lp 12105
UID   PID  PPID CPU PRI NI    VSZ   RSS MWCHAN   STAT TT     TIME COMMAND
  0 12105 12104   0  20  0 105692 35984 kmem are D     -  0:03.76 zpool
history BI
SUPERTEX:/root#

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