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Re: port-i386/52266: Double fault early in boot with AMD Am5x86 CPU

The following reply was made to PR port-i386/52266; it has been noted by GNATS.

From: "John D. Baker" <>
Subject: Re: port-i386/52266: Double fault early in boot with AMD Am5x86 CPU
Date: Sun, 9 Jul 2017 00:42:13 -0500 (CDT)

 Just to double check, I grabbed:
 and it panics on the net4501 the same as my locally-built kernels:
 > boot /netbsd.tst -s
 17769700+697548+846740 [821024+839243+13086]=0x14050c0
 fatal prfatal double fault in supervisor mode
 trap type 13 code 0xc0118298 eip 0x8 cs 0x246 eflags 0xc054cd46 cr2 0 ilevel 0x8 esp 0xc11f4760
 curlwp 0xc1269820 pid 0 lid 1 lowest kstack 0xc15762c0
 kernel: user trap double fault, code=0
 Stopped in pid 0.1 (system) at  8:      invalid address
 db{0}> bt
 panic: kernel diagnostic assertion "l->l_nopreempt > 0" failed: file "/usr/src/sys/sys/lwp.h", line 513 
 fatal breakpoint trap in supervisor mode
 trap type 1 code 0 eip 0xc0118734 cs 0x8 eflags 0x246 cr2 0x1c ilevel 0x8 esp 0xc1269a08
 curlwp 0xc1269820 pid 733240715 lid 96 lowest kstack 0xc1269b10
 fatal page fault in supervisor mode     c0118734:       popl    %ebp
 The last line is repeatedly overprinted several times and then the
 machine reboots.
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