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Date:      Thu, 23 Oct 2014 11:59:08 +0300
From:      Mailing lists <gprs@paladin.bulgarpress.com>
To:        stable@freebsd.org
Subject:   FreeBSD 9.1 + Supermicro IPMI + reboot = kernel crash
Message-ID:  <5448C35C.5080600@paladin.bulgarpress.com>

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Hi people,
I've three machines - FreeBSD 9.1 (i386+amd64) - at reboot usually the
kernel dump and therefore gmirror rebuilds, etc.

After reboot - kldload show the module is inserted but /dev/ipmi* is not
populated, kldunload + kldload of the module fixes the access +
/dev/ipmi* population.

Any ideas (except upgrade which I plan to 9.3 soon)?

+Waiting (max 60 seconds) for system process `vnlru' to stop...done
+Waiting (max 60 seconds) for system process `bufdaemon' to stop...done
+
+Waiting (max 60 seconds) for system process `syncer' to stop...Syncing
disks, vnodes remaining...9 Sleeping thread (tid 100093, pid 16) owns a
non-sleepable lock
+KDB: stack backtrace of thread 100093:
+#0 0xffffffff808f3196 at mi_switch+0x186
+#1 0xffffffff8092bfa2 at sleepq_wait+0x42
+#2 0xffffffff808f3926 at _sleep+0x376
+#3 0xffffffff81551227 at ipmi_submit_driver_request+0x97
+#4 0xffffffff815519df at ipmi_set_watchdog+0xaf
+#5 0xffffffff81551c8f at ipmi_wd_event+0x8f
+#6 0xffffffff807bbdef at kern_do_pat+0x9f
+#7 0xffffffff80984187 at sched_sync+0x1e7
+#8 0xffffffff808bbe3f at fork_exit+0x11f
+#9 0xffffffff80bc3d9e at fork_trampoline+0xe
+panic: sleeping thread
+cpuid = 0
+KDB: stack backtrace:
+#0 0xffffffff80920cf6 at kdb_backtrace+0x66
+#1 0xffffffff808ead0e at panic+0x1ce
+#2 0xffffffff8092f172 at propagate_priority+0x1d2
+#3 0xffffffff8092fe9e at turnstile_wait+0x1be
+#4 0xffffffff808d9198 at _mtx_lock_sleep+0xd8
+#5 0xffffffff8097d9b3 at vn_syncer_add_to_worklist+0x143
+#6 0xffffffff80981ac4 at reassignbuf+0xe4
+#8 0xffffffff8096a232 at bdwrite+0x52
+#7 0xffffffff809661c2 at bdirty+0x42
+#9 0xffffffff80af4ba9 at ffs_freefile+0x269
+#10 0xffffffff80b09711 at handle_workitem_freefile+0x101
+#11 0xffffffff80b09ba7 at process_worklist_item+0x377
+#12 0xffffffff80b0d8d6 at softdep_process_worklist+0x96
+#13 0xffffffff80b0fee7 at softdep_flush+0x197
+#14 0xffffffff808bbe3f at fork_exit+0x11f



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