Date: Wed, 23 Feb 2005 14:30:01 +0100 From: Arjan Van Leeuwen <avleeuwen@gmail.com> To: Jeff Roberson <jroberson@chesapeake.net> Cc: current@freebsd.org Subject: Re: Patches to use local APIC timer cause SCHED_ULE panic at boot Message-ID: <d86b48730502230530330966e8@mail.gmail.com> In-Reply-To: <20050222194750.W52537@mail.chesapeake.net> References: <d86b48730502211235470f0e93@mail.gmail.com> <20050222194750.W52537@mail.chesapeake.net>
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On Tue, 22 Feb 2005 19:49:05 -0500 (EST), Jeff Roberson <jroberson@chesapeake.net> wrote: > On Mon, 21 Feb 2005, Arjan Van Leeuwen wrote: > > > Hey, > > > > The recently committed patches to use the local APIC timer to drive > > the various kernel clocks on SMP machines (by jhb) panic my SMP system > > at boot when > > 1) SCHED_ULE is used instead of SCHED_4BSD > > 2) INVARIANTS_* and WITNESS_* are disabled (I don't know which one is > > the culprit, but if I enable them all the system doesn't panic). > > > > I can't provide a dump, since (I assume) the hard drive isn't > > initialized yet, but I have a debug kernel if that's useful. > > > > Here is the panic: > > I understand what happened. Somehow this has introduced a preemption > before we would have had one before. This has invalidated an assert that > is there. I'll remove it. Thanks! I assume you won't need a KTR_SCHED trace anymore? Arjan > > > Timecounters tick every 1.000 msec > > panic: Thread not on runq. > > cpuid = 0 > > KDB: enter: panic > > [thread pid 0 tid 0] > > Stopped at kdb_enter+0x30: leave > > db> trace > > Tracing pid 0 tid 0 td 0xc0769020 > > kdb_enter(c071398d,0,c07147a2,c0c207d4,c1a12f60) at kdb_enter+0x30 > > panic(c07147a2,369e99,c0769020,1,c0746120) at panic+0x14e > > sched_switch(c0769020,0,2,b43e27c0,87c7fc) at sched_switch+0x85 > > mi_switch(2,0,ffffffff,7fff0000,ffffffff) at mi_switch+0x1d9 > > critical_exit(c0c20888,c0c20890,c06e8dfe) at critical_exit+0xbf > > lapic_handle_timer(0) at lapic_handle_timer+0xf5 > > Xtimerint(c0c20938,c0714fc7,a,61c2091c,c05c4000) at Xtimerint+0x30 > > vsscanf(c0886103,c0714fb3,c0c20a70,c0c20b50,c0564312) at vsscanf+0x1fc > > sscanf(c0886103,c0714fb3,c0c20b24,c0c20a80,c0c20b04) at sscanf+0x1f > > res_find(c0c20bf8,c0c20bd0,c0719124,0,0) at res_find+0x262 > > resource_find(c0c20bf8,c0c20bd0,c0719124,0,0) at resource_find+0x67 > > resource_find_dev(c0c20bf8,c0719124,c0c20bfc,0,0) at resource_find_dev+0x6a > > if_findindex(c1c1ec00,0,0,0,c0703b9c) at if_findindex+0x126 > > if_attach(c1c1ec00,c07044a6,0,0,c074cea0) at if_attach+0x1ac > > lo_clone_create(c074cea0,0,d,0,c074ce88) at lo_create+0x79 > > ifc_simple_create(c074cea0,c0c20cf8,10,c07044a6,0) at ifc_simple_create+0x66 > > ifc_simple_attach(c074cea0,c0718afd,0,0,c0777a20) at ifc_simple_attach+0x55 > > if_clone_attach(c074cea0,c0718d90,0,0,c0c20d80) at if_clone_attach+0x1cf > > loop_modevent(c198b8c0,0,0,c28000,c0c20d80) at loop_modevent+0x6a > > module_register_init(c074cef4,c1e000,c1ec00,c1e000,0) at > > module_register_init+0x81 > > mi_startup() at mi_startup+0xb5 > > begin() at begin+0x2c > > > > > addr2line -f -e kernel.debug 0xC055AA15 > > sched_switch > > /usr/src/sys/kern/sched_ule.c:1362 > > > addr2line -f -e kernel.debug 0xC054C7A9 > > mi_switch > > /usr/src/sys/kern/kern_synch.c:366 > > > addr2line -f -e kernel.debug 0xC055BF9F > > critical_exit > > /usr/src/sys/kern/kern_switch.c:596 > > > addr2line -f -e kernel.debug 0xC06C9E15 > > lapic_handle_timer > > /usr/src/sys/i386/i386/local_apic.c:657 > > > addr2line -f -e kernel.debug 0xC06C3180 > > Xtimerint > > /usr/src/sys/i386/i386/apic_vector.s:138 > > >
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