Re: panic: mutex sched lock 0 not owned at /usr/src/sys/kern/sched_ule.c:2341

On Wednesday, March 20, 2013 4:58:25 pm Jerome Ibanes wrote:
> List,
> 
> The following crash happened when booting:
> 
>   FreeBSD-10.0-projects_altix2-r245399-JPSNAP-ia64-ia64-bootonly.iso
> 
> on SGI Altix 350 dual cpu. The backtrace appears in the enclosed file and at the
> end of this message.
> 
> ---[snip]---
> panic: mutex sched lock 0 not owned at /usr/src/sys/kern/sched_ule.c:2341
> cpuid = 1
> KDB: enter: panic
> [ thread pid 11 tid 100004 ]
> Stopped at      kdb_enter+0x92: [I2]    addl r14=0xffffffffffe3aaa8,gp ;;
> db> where
> Tracing pid 11 tid 100004 td 0xe0000030114371c0
> kdb_enter(0x9ffc000000faa808, 0x9ffc000000faa808, 0x9ffc0000008ba8f0,
> 0x40c) at kdb_enter+0x92
> vpanic(0x9ffc000000fa8168, 0xa00000000022dbb8) at vpanic+0x2b0
> panic(0x9ffc000000fa8168, 0x9ffc00000118ee38, 0x9ffc000000fad080,
> 0x925) at panic+0x80
> __mtx_assert(0x9ffc00000118e180, 0x4, 0x9ffc000000fad080, 0x925) at
> __mtx_assert+0x110
> sched_add(0xe00000301174a470, 0x4, 0x9ffc00000118ee80, 0x1,
> 0x9ffc000000862f40) at sched_add+0x260
> intr_event_schedule_thread(0xe00000301144b200, 0xe000003010dfeb80,
> 0xe00000301174a470, 0xe000003011433240) at
> intr_event_schedule_thread+0x1e0
> intr_event_handle(0xe00000301144b200, 0xa00000000022dc00, 0x0) at
> intr_event_handle+0x330
> ia64_ih_irq(0xe0000030114371c0, 0x41, 0xa00000000022dc00) at ia64_ih_irq+0xf0
> ia64_handle_intr(0xa00000000022dc00) at ia64_handle_intr+0x110
> ivt_External_Interrupt() at ivt_External_Interrupt+0x30
> --- trapframe at 0xa00000000022dc00
> ia64_ap_startup() at ia64_ap_startup+0x2a0
> os_boot_rendez() at os_boot_rendez+0x240
> ia64_ap_startup(0x30b5ffe947b2cf7f, 0xcabac28abdbdf21c,
> 0x24b4a3a653b39330, 0xcdd70693bad03605) at ia64_ap_startup+0x280
> (null)(0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0) at 0xcabac28abdbdf21c
> db>

On most platforms the APs don't enable interrupts until their first context
switch into their idle thread completes.  It seems they are enabled by
accident here?

-- 
John Baldwin
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