re: kern/50186: sparc memfault panic after 7.99.21 ARP changes

["John D. Baker" <jdbaker%mylinuxisp.com@localhost>]

The following reply was made to PR kern/50186; it has been noted by GNATS.

From: "John D. Baker" <jdbaker%mylinuxisp.com@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: re: kern/50186: sparc memfault panic after 7.99.21 ARP changes
Date: Wed, 2 Sep 2015 06:44:47 -0500 (CDT)

 I've repeated my observations on a few other machines:
 
 SPARCstation 5, 85MHz, 256MB
 SPARCstation 10, 40MHz (SM41 SuperSPARC), 128MB
 
 and most recently:
 
 NetBSD dpe2950 7.99.21 NetBSD 7.99.21 (GENERIC) #63: Mon Aug 31 19:52:42 CDT 2015  sysop%yggdrasil.technoskunk.fur@localhost:/r0/build/current/obj/amd64/sys/arch/amd64/compile/GENERIC amd64
 
 The panic:
 
 panic: kernel diagnostic assertion "rt != NULL" failed: file "/r0/nbsd/current/src/sys/netinet/if_arp.c", line 1431 
 fatal breakpoint trap in supervisor mode
 trap type 1 code 0 rip ffffffff8028a395 cs 8 rflags 246 cr2 ffff8000ddb92800 ilevel 2 rsp fffffe8115ef0e80
 curlwp 0xfffffe8115f1ca40 pid 0.50 lowest kstack 0xfffffe8115eed2c0
 Stopped in pid 0.50 (system) at netbsd:breakpoint+0x5:  leave
 db{6}> bt
 breakpoint() at netbsd:breakpoint+0x5
 vpanic() at netbsd:vpanic+0x13c
 kern_assert() at netbsd:kern_assert+0x4f
 arptimer() at netbsd:arptimer+0x1d0
 callout_softclock() at netbsd:callout_softclock+0x1d0
 softint_dispatch() at netbsd:softint_dispatch+0xd3
 DDB lost frame for netbsd:Xsoftintr+0x4f, trying 0xfffffe8115ef0ff0
 Xsoftintr() at netbsd:Xsoftintr+0x4f
 --- interrupt ---
 0:
 db{6}>
 
 
 Excerpt from 'dmesg':
 
 NetBSD 7.99.21 (GENERIC) #63: Mon Aug 31 19:52:42 CDT 2015
 	sysop%yggdrasil.technoskunk.fur@localhost:/r0/build/current/obj/amd64/sys/arch/amd64/compile/GENERIC
 total memory = 12287 MB
 avail memory = 11911 MB
 [...]
 ACPI: RSDP 0x00000000000F2620 000024 (v02 DELL  )
 ACPI: XSDT 0x00000000000F26A0 00004C (v01 DELL   PE_SC3   00000001 DELL 00000001)
 ACPI: FACP 0x00000000000F27A8 0000F4 (v03 DELL   PE_SC3   00000001 DELL 00000001)
 ACPI: DSDT 0x00000000CFFA8000 003C53 (v01 DELL   PE_SC3   00000001 MSFT 0100000E)
 ACPI: FACS 0x00000000CFFB7C00 000040
 ACPI: FACS 0x00000000CFFB7C00 000040
 ACPI: APIC 0x00000000000F289C 0000C8 (v01 DELL   PE_SC3   00000001 DELL 00000001)
 ACPI: SPCR 0x00000000000F297D 000050 (v01 DELL   PE_SC3   00000001 DELL 00000001)
 ACPI: HPET 0x00000000000F29CD 000038 (v01 DELL   PE_SC3   00000001 DELL 00000001)
 ACPI: MCFG 0x00000000000F2A05 00003C (v01 DELL   PE_SC3   00000001 DELL 00000001)
 ACPI: All ACPI Tables successfully acquired
 ioapic0 at mainbus0 apid 8
 ioapic1 at mainbus0 apid 9
 cpu0 at mainbus0 apid 0
 cpu0: Intel(R) Xeon(R) CPU           E5310  @ 1.60GHz, id 0x6f7
 cpu1 at mainbus0 apid 4
 cpu1: Intel(R) Xeon(R) CPU           E5310  @ 1.60GHz, id 0x6f7
 cpu2 at mainbus0 apid 1
 cpu2: Intel(R) Xeon(R) CPU           E5310  @ 1.60GHz, id 0x6f7
 cpu3 at mainbus0 apid 5
 cpu3: Intel(R) Xeon(R) CPU           E5310  @ 1.60GHz, id 0x6f7
 cpu4 at mainbus0 apid 2
 cpu4: Intel(R) Xeon(R) CPU           E5310  @ 1.60GHz, id 0x6f7
 cpu5 at mainbus0 apid 6
 cpu5: Intel(R) Xeon(R) CPU           E5310  @ 1.60GHz, id 0x6f7
 cpu6 at mainbus0 apid 3
 cpu6: Intel(R) Xeon(R) CPU           E5310  @ 1.60GHz, id 0x6f7
 cpu7 at mainbus0 apid 7
 cpu7: Intel(R) Xeon(R) CPU           E5310  @ 1.60GHz, id 0x6f7
 
 
 So, this is not just a SPARC issue.
 
 I see that KASSERTs in "if_arp.c" were recently disabled.
 
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