Assertion td->td_turnstile

[Randy Bush]

> current as of an hour ago
> smp
> 
> 
> panic: Assertion td->td_turnstile != NULL failed at /usr/src/sys/kern/subr_turnstile.c:478
> cpuid = 0; 
> KDB: enter: panic
> [thread 100340]
> Stopped at      kdb_enter+0x30: movl    %ebp,%esp
> db> trace
> kdb_enter(c05f8022,0,c05f4cb4,df14faa8,100) at kdb_enter+0x30
> panic(c05f4cb4,c05fb006,c05fadea,1de,c064d588) at panic+0x156
> turnstile_wait(c2142a00,c0642980,c27b89a0,20e,c26d4dc0) at turnstile_wait+0x2ac
> _mtx_lock_sleep(c0642980,0,c05f4d75,cc,c26d4dc0) at _mtx_lock_sleep+0x195
> _mtx_lock_flags(c0642980,0,c05f4d75,cc,1) at _mtx_lock_flags+0xb2
> cv_wait_sig(c0672e24,c0672e00,c05fbc70,2ee,4) at cv_wait_sig+0x2f4
> kern_select(c26d4dc0,4,bfbfed10,0,0) at kern_select+0x516
> select(c26d4dc0,df14fd14,14,431,5) at select+0x66
> syscall(835002f,2f,a7f002f,835b000,0) at syscall+0x2a0
> Xint0x80_syscall() at Xint0x80_syscall+0x1f
> --- syscall (93, FreeBSD ELF32, select), eip = 0x284e3fbf, esp = 0xbfbfe8bc, ebp = 0xbfbfe8f8 ---
> db> 

reproduces with non-smp kernel

filed kern/69629

randy