Date: Tue, 12 Dec 2006 16:12:50 -0500 From: John Baldwin <jhb@freebsd.org> To: "Marc G. Fournier" <scrappy@hub.org> Cc: freebsd-stable@freebsd.org Subject: Re: panic: sleeping thread Message-ID: <200612121612.50942.jhb@freebsd.org> In-Reply-To: <ED7F549771CCB4F17AAFF791@ganymede.hub.org> References: <624054998B7DEF7D446796E1@ganymede.hub.org> <200612111740.23259.jhb@freebsd.org> <ED7F549771CCB4F17AAFF791@ganymede.hub.org>
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On Tuesday 12 December 2006 15:47, Marc G. Fournier wrote: > > --On Monday, December 11, 2006 17:40:22 -0500 John Baldwin <jhb@freebsd.org> > wrote: > > > Maybe use ssh -e none? You don't need to break into ddb though, when it > > panics it will print out more useful info on its own. > > Ah, like: > > Sleeping thread (tid 101409, pid 78573) owns a non-sleepable lock > sched_switch() at sched_switch+0x11f > mi_switch() at mi_switch+0x14c > sleepq_wait() at sleepq_wait+0x5b > cv_wait() at cv_wait+0xed > _sx_xlock() at _sx_xlock+0x51 > vm_map_lookup() at vm_map_lookup+0x3c > vm_fault() at vm_fault+0xba > trap_pfault() at trap_pfault+0x127 > trap() at trap+0x1bd > calltrap() at calltrap+0x5 > --- trap 0xc, rip = 0xffffffff801f8c91, rsp = 0xffffffffb908a930, rbp = > 0xffffff > ffb908a970 --- > _mtx_trylock() at _mtx_trylock+0x1 > unlock_and_deallocate() at unlock_and_deallocate+0x10e > vm_fault() at vm_fault+0x1ca0 > trap_pfault() at trap_pfault+0x127 > trap() at trap+0x3e6 > calltrap() at calltrap+0x5 > --- trap 0xc, rip = 0x8028d9bf7, rsp = 0x7fffffffe900, rbp = 0x7fffffffe900 --- > panic: sleeping thread > cpuid = 1 Yeah. The LOR is bogus though, it's a secondary effect. The real problem is the fault in _mtx_trylock(), and that's probably due to a bug in the previous frame in unlock_and_deallocate(). If you can get a core dump that would be most helpful. -- John Baldwin
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