Date: Tue, 21 Jun 2016 22:40:16 +0300 From: "Andriy Voskoboinyk" <s3erios@gmail.com> To: =?utf-8?Q?Otac=C3=ADlio?= <otacilio.neto@bsd.com.br> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org>, freebsd-hackers@freebsd.org Subject: Re: (beagleboneblack/urtwn) Kernel page fault with the following non-sleepable locks held Message-ID: <op.yje99ex5iew4ia@localhost> In-Reply-To: <1a55f000-eff9-31db-f420-e00278c4c054@bsd.com.br> References: <fd733c3a-1407-88ae-3bf9-f664e821deb0@bsd.com.br> <5e322d5a-8c42-8e69-f3c4-e607d40e8724@bsd.com.br> <1a55f000-eff9-31db-f420-e00278c4c054@bsd.com.br>
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Tue, 21 Jun 2016 03:06:15 +0300 =D0=B1=D1=83=D0=BB=D0=BE =D0=BD=D0=B0=D0=
=BF=D0=B8=D1=81=D0=B0=D0=BD=D0=BE Otac=C3=ADlio =
<otacilio.neto@bsd.com.br>:
Should be fixed in r302064.
> Em 19/06/2016 18:47, Otac=C3=ADlio escreveu:
>> Em 19/06/2016 18:40, Otac=C3=ADlio escreveu:
>>> I was installing netperf on a fresh FreeBSD-ALPHA3
>>>
>>> FreeBSD beaglebone 11.0-ALPHA3 FreeBSD 11.0-ALPHA3 #0 r301846: Mon J=
un =
>>> 13 19:54:27 BRT 2016 =
>>> ota@nostromo:/root/crochet/work/obj/arm.armv6/usr/src/sys/BEAGLEBONE=
-DEBUG =
>>> arm
>>>
>>> on BeagleboneBlack using wrtwn when I got this kernel panic:
>>>
>>> root@beaglebone:/usr/home/ota # pkg install netperf
>>> Updating FreeBSD repository catalogue...
>>> Fetching meta.txz: 100% 944 B 0.9kB/s 00:01
>>> Fetching packagesite.txz: 100% 4 MiB 46.0kB/s 01:42
>>> Processing entries: 6%lock order reversal:
>>> 1st 0xc30b35d4 syncer (syncer) @ /usr/src/sys/kern/vfs_subr.c:2048
>>> 2nd 0xc319d6f4 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2498
>>> stack backtrace:
>>> Processing entries: 58%Kernel page fault with the following =
>>> non-sleepable locks held:
>>> exclusive sleep mutex tcp_sc_head (tcp_sc_head) r =3D 0 (0xc2f9d520)=
=
>>> locked @ /usr/src/sys/netinet/tcp_syncache.c:494
>>> shared rw tcp (tcp) r =3D 0 (0xc08ef348) locked @ =
>>> /usr/src/sys/netinet/tcp_input.c:1034
>>> exclusive rw tcpinp (tcpinp) r =3D 0 (0xc31ab494) locked @ =
>>> /usr/src/sys/netinet/in_pcb.c:1964
>>> stack backtrace:
>>> Fatal kernel mode data abort: 'Alignment Fault' on read
>>> trapframe: 0xdcfe58a8
>>> FSR=3D00000001, FAR=3Dc2e7187a, spsr=3D60000013
>>> r0 =3Dc08e7988, r1 =3D00000004, r2 =3Dc06fa3ad, r3 =3D000007b6
>>> r4 =3Ddcfe5a10, r5 =3Ddcfe5b28, r6 =3Dc2e71876, r7 =3Dc2f9d520
>>> r8 =3Dc2f9d520, r9 =3Dc2e71876, r10=3Ddcfe5b28, r11=3Ddcfe5970
>>> r12=3D00000000, ssp=3Ddcfe5938, slr=3Dc2d34370, pc =3Dc053d8e8
>>>
>>> [ thread pid 13 tid 100036 ]
>>> Stopped at syncookie_lookup+0x38: ldmib r6, {r1-r2}
>>> db>
>>>
>>>
>>> []'s
>>>
>>> -Otac=C3=ADlio
>>>
>> The kernel panic is totally reproducible. I need only do a ssh in the=
=
>> beaglebone using ptty on windows or ssh on freebsd and the kernel pan=
ic =
>> is raised.
>>
>> FreeBSD/arm (beaglebone) (ttyu0)
>>
>> login: Kernel page fault with the following non-sleepable locks held:=
>> exclusive sleep mutex tcp_sc_head (tcp_sc_head) r =3D 0 (0xc2f95480) =
=
>> locked @ /usr/src/sys/netinet/tcp_syncache.c:494
>> shared rw tcp (tcp) r =3D 0 (0xc08ef348) locked @ =
>> /usr/src/sys/netinet/tcp_input.c:1034
>> exclusive rw tcpinp (tcpinp) r =3D 0 (0xc341e494) locked @ =
>> /usr/src/sys/netinet/in_pcb.c:1964
>> stack backtrace:
>> Fatal kernel mode data abort: 'Alignment Fault' on read
>> trapframe: 0xdcfe58a8
>> FSR=3D00000001, FAR=3Dc2e7807a, spsr=3D60000013
>> r0 =3Dc08e7988, r1 =3D00000004, r2 =3Dc06fa3ad, r3 =3D000007b6
>> r4 =3Ddcfe5a10, r5 =3Ddcfe5b28, r6 =3Dc2e78076, r7 =3Dc2f95480
>> r8 =3Dc2f95480, r9 =3Dc2e78076, r10=3Ddcfe5b28, r11=3Ddcfe5970
>> r12=3D00000000, ssp=3Ddcfe5938, slr=3Dc2d34370, pc =3Dc053d8e8
>>
>> [ thread pid 13 tid 100036 ]
>> Stopped at syncookie_lookup+0x38: ldmib r6, {r1-r2}
>> db>
>>
> FreeBSD11-ALPHA4 shows the same behavior. The only thing that I need t=
o =
> raise the fault is ssh in the beaglebone.
>
>
> root@beaglebone:~ # uname -a
> FreeBSD beaglebone 11.0-ALPHA4 FreeBSD 11.0-ALPHA4 #0 r301975: Fri Jun=
=
> 17 13:32:55 UTC 2016 =
> root@releng2.nyi.freebsd.org:/usr/obj/arm.armv6/usr/src/sys/BEAGLEBONE=
=
> arm
> root@beaglebone:~ # Kernel page fault with the following non-sleepable=
=
> locks held:
> exclusive sleep mutex tcp_sc_head (tcp_sc_head) r =3D 0 (0xc2f98740) =
> locked @ /usr/src/sys/netinet/tcp_syncache.c:494
> shared rw tcp (tcp) r =3D 0 (0xc08ef348) locked @ =
> /usr/src/sys/netinet/tcp_input.c:1034
> exclusive rw tcpinp (tcpinp) r =3D 0 (0xc33e4494) locked @ =
> /usr/src/sys/netinet/in_pcb.c:1964
> stack backtrace:
> Fatal kernel mode data abort: 'Alignment Fault' on read
> trapframe: 0xdcfe58c0
> FSR=3D00000001, FAR=3Dc2e7a07a, spsr=3D60000013
> r0 =3Dc08e7988, r1 =3D00000004, r2 =3Dc06fabe6, r3 =3D000007b6
> r4 =3Ddcfe5a28, r5 =3Ddcfe5b40, r6 =3Dc2e7a076, r7 =3Dc2f98740
> r8 =3Dc2f98740, r9 =3Dc2e7a076, r10=3Ddcfe5b40, r11=3Ddcfe5988
> r12=3D00000000, ssp=3Ddcfe5950, slr=3Dc2d33370, pc =3Dc053df7c
>
> [ thread pid 13 tid 100036 ]
> Stopped at syncookie_lookup+0x38: ldmib r6, {r1-r2}
> db>
>
>
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