Date: Thu, 26 Jul 2012 09:01:18 -0700 From: Garrett Cooper <yanegomi@gmail.com> To: David Wolfskill <david@catwhisker.org> Cc: Luigi Rizzo <rizzo@iet.unipi.it>, current@freebsd.org Subject: Re: panic: _mtx_lock_sleep: recursed on non-recursive mutex em0 @ /usr/src/sys/dev/e1000/if_lem.c:881 Message-ID: <CAGH67wT2gNUiXNVXPYMfRtuZROnoH7ybybx40D76vx2YZS2-yw@mail.gmail.com> In-Reply-To: <20120726154610.GC1587@albert.catwhisker.org> References: <20120726154610.GC1587@albert.catwhisker.org>
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On Thu, Jul 26, 2012 at 8:46 AM, David Wolfskill <david@catwhisker.org> wrote: > This is at r238795; cut/paste of backtrace: > > KDB: enter: panic > [ thread pid 12 tid 100026 ] > Stopped at kdb_enter+0x3d: movl $0,kdb_why > db> bt > Tracing pid 12 tid 100026 td 0xc6755000 > kdb_enter(c0f93c5f,c0f93c5f,c0f91e21,f08398f0,c1825c80,...) at kdb_enter+0x3d > panic(c0f91e21,c66739a0,c0f20db8,371,c6755000,...) at panic+0x1c4 > _mtx_lock_sleep(c68b8560,c6755000,c0f20db8,c0f20db8,371,...) at _mtx_lock_sleep+0x35e > _mtx_lock_flags(c68b8560,0,c0f20db8,371,0,...) at _mtx_lock_flags+0xdb > lem_start(c68ba000,0,c0fa806c,d20,2a,...) at lem_start+0x33 > if_transmit(c68ba000,c93d9000,6,c6755000,c65da588,...) at if_transmit+0x129 > ether_output(c68ba000,c93d9000,f0839aa4,0,0,...) at ether_output+0x5df > arpintr(c93d9000,8,c0f50314,153,0,...) at arpintr+0x108c > netisr_dispatch_src(7,0,c93d9000,c93d9000,c68ba000,c93d0806) at netisr_dispatch_src+0xa7 > netisr_dispatch(7,c93d9000,c93d9000,10,3,...) at netisr_dispatch+0x20 > ether_demux(c68ba000,c93d9000,3,0,3,...) at ether_demux+0x133 > ether_nh_input(c93d9000,c8f012c8,644d6000,c9492d00,0,...) at ether_nh_input+0x329 > netisr_dispatch_src(9,0,c93d9000,e2e,2,1) at netisr_dispatch_src+0xa7 > netisr_dispatch(9,c93d9000) at netisr_dispatch+0x20 > ether_input(c68ba000,c93d9000,c0f20db8,e2e,c11454c0,...) at ether_input+0x21 > lem_intr(c68b6000,8,c0f8e00d,561,0,...) at lem_intr+0x567 > intr_event_execute_handlers(c11454c0,c6626200,c0f8e00d,561,c6755000,...) at intr_event_execute_handlers+0xc5 > ithread_loop(c6627730,f0839d08,c0f8dd64,3db,0,...) at ithread_loop+0xe2 > fork_exit(c0a2dcb0,c6627730,f0839d08) at fork_exit+0x7c > fork_trampoline() at fork_trampoline+0x8 > --- trap 0, eip = 0, esp = 0xf0839d40, ebp = 0 --- > db> show locks > exclusive sleep mutex em0 (EM TX Lock) r = 0 (0xc68b8560) locked @ /usr/src/sys/dev/e1000/if_lem.c:1324 > exclusive sleep mutex em0 (EM Core Lock) r = 0 (0xc68b854c) locked @ /usr/src/sys/dev/e1000/if_lem.c:1302 > db> > > I need to head off to a meeting; I can poke at the machine a bit more > in a couple of hours or so. Probably fallout from Luigi enabling legacy interrupts by default in r238765. -Garrett
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