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From: Per olof Ljungmark <peo@intersonic.se>
Subject: Re: kern/172952: 9.1 hangs on reboot after all buffers synced
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The following reply was made to PR kern/172952; it has been noted by GNATS.

From: Per olof Ljungmark <peo@intersonic.se>
To: bug-followup@FreeBSD.org
Cc: Andriy Gapon <avg@FreeBSD.org>
Subject: Re: kern/172952: 9.1 hangs on reboot after all buffers synced
Date: Wed, 24 Oct 2012 19:46:52 +0200

 Process 1 (init) at 0xfffffe0002f7d940:
  state: NORMAL
  uid: 0  gids: 0
  parent: pid 0 at 0xffffffff81259340
  ABI: FreeBSD ELF64
  arguments: /sbin/init
  threads: 1
 100002                   D       zcollide 0xfffffe00aa18bc80 [init]
 
 db> thread 100002
 [ thread pid 1 tid 100002 ]
 sched_switch+0x119:     movl    %gs:0x34,%ebx
 
 db> bt
 Tracing pid 1 tid 100002 td 0xfffffe0002f80920
 sched_switch() at sched_switch+0x119
 mi_switch() at mi_switch+0x186
 sleepq_timedwait() at sleepq_timedwait+0x42
 _sleep() at _sleep+0x1c9
 zfs_zget() at zfs_zget+0x1f5
 zfs_get_data() at zfs_get_data+0x4a
 zil_commit() at zil_commit+0x541
 zfs_freebsd_write() at zfs_freebsd_write+0xba0
 VOP_WRITE_APV() at VOP_WRITE_APV+0xb2
 vnode_pager_generic_putpages() at vnode_pager_generic_putpages+0x1bb
 vnode_pager_putpages() at vnode_pager_putpages+0xa9
 vm_pageout_flush() at vm_pageout_flush+0xc0
 vm_object_page_collect_flush() at vm_object_page_collect_flush+0x143
 vm_object_page_clean() at vm_object_page_clean+0x143
 vm_object_terminate() at vm_object_terminate+0x215
 vnode_destroy_vobject() at vnode_destroy_vobject+0xb9
 zfs_freebsd_reclaim() at zfs_freebsd_reclaim+0x57
 vgonel() at vgonel+0x127
 vflush() at vflush+0x2bf