Date: Tue, 31 Jul 2012 16:34:24 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-stable@freebsd.org, sbruno@freebsd.org Subject: Re: [stable 9] panic on reboot: ipmi_wd_event() Message-ID: <201207311634.24169.jhb@freebsd.org> In-Reply-To: <1342742294.2656.24.camel@powernoodle.corp.yahoo.com> References: <1342742294.2656.24.camel@powernoodle.corp.yahoo.com>
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On Thursday, July 19, 2012 7:58:14 pm Sean Bruno wrote: > Working on the Dell R420 today, got most of it working, even the > broadcom ethernet cards! However, I get the following when I reboot the > system: > > Syncing disks, vnodes remaining...4 Sleeping thread (tid 100107, pid 9) > owns a non-sleepable lock > KDB: stack backtrace of thread 100107: > sched_switch() at sched_switch+0x19f > mi_switch() at mi_switch+0x208 > sleepq_switch() at sleepq_switch+0xfc > sleepq_wait() at sleepq_wait+0x4d > _sleep() at _sleep+0x3f6 > ipmi_submit_driver_request() at ipmi_submit_driver_request+0x97 > ipmi_set_watchdog() at ipmi_set_watchdog+0xb1 > ipmi_wd_event() at ipmi_wd_event+0x8f > kern_do_pat() at kern_do_pat+0x10f > sched_sync() at sched_sync+0x1ea > fork_exit() at fork_exit+0x135 > fork_trampoline() at fork_trampoline+0xe Hmmm, the watchdog pat should probably happen without holding locks if possible. This is related to the IPMI watchdog being special and wanting to schedule a thread to work. -- John Baldwin
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