Date: Sun, 21 Dec 2014 15:43:17 +0100 From: Hans Petter Selasky <hps@selasky.org> To: Fabian Keil <freebsd-listen@fabiankeil.de> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: Panic after USB deadlock followed by kldunload umass.ko Message-ID: <5496DC85.8060902@selasky.org> In-Reply-To: <0f51077e.10c32ab3@fabiankeil.de> References: <03fafb9a.529c7f26@fabiankeil.de> <5449119B.8090401@selasky.org> <7af2d4d6.5c73ae4f@fabiankeil.de> <0f51077e.10c32ab3@fabiankeil.de>
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On 12/21/14 14:54, Fabian Keil wrote: > #0 sched_switch (td=0xfffff80015ea0940, newtd=<value optimized out>, flags=<value optimized out>) at /usr/src/sys/kern/sched_ule.c:1940 > #1 0xffffffff805bbf91 in mi_switch (flags=260, newtd=0x0) at /usr/src/sys/kern/kern_synch.c:492 > #2 0xffffffff8060126a in sleepq_wait (wchan=0x0, pri=0) at /usr/src/sys/kern/subr_sleepqueue.c:631 > #3 0xffffffff805bb99d in _sleep (ident=<value optimized out>, lock=<value optimized out>, priority=<value optimized out>, wmesg=<value optimized out>, sbt=<value optimized out>, pr=<value optimized out>, > flags=<value optimized out>) at /usr/src/sys/kern/kern_synch.c:254 > #4 0xffffffff802a2548 in cam_sim_free (sim=0xfffff8004f9fa800, free_devq=1) at /usr/src/sys/cam/cam_sim.c:109 Because cam_sim_free() doesn't return, the USB subsystem belonging to that controller is somewhat blocked. --HPS
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