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Date:      Sun, 6 Mar 2022 23:22:42 +0100 (CET)
From:      Ronald Klop <ronald-lists@klop.ws>
To:        FreeBSD Current <freebsd-current@freebsd.org>
Subject:   Re: panic: data abort in critical section or under mutex  (was: Re: panic: Unknown kernel exception 0 esr_el1 2000000 (on 14-CURRENT/aarch64 Feb 28))
Message-ID:  <710436463.96.1646605362794@mailrelay>
In-Reply-To: <989767310.86.1646492957581@mailrelay>
References:  <1716388080.66.1646478964882@mailrelay> <989767310.86.1646492957581@mailrelay>
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------=_Part_95_599078998.1646605362707
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Hi,

Did some binary search with kernels from artifact.ci.freebsd.org.

I suspect "rmlock: Micro-optimize read locking" as cause.
https://cgit.freebsd.org/src/commit/?id=c84bb8cd771ce4bed58152e47a32dda470bef23a

And "rmlock: Add required compiler barriers to _rm_runlock()" as solution.
https://cgit.freebsd.org/src/commit/?id=89ae8eb74e87ac19aa2d7abe4ba16bcccd32bb9f

So I probably just had a bad day.

Regards,
Ronald.

 
Van: Ronald Klop <ronald-lists@klop.ws>
Datum: zaterdag, 5 maart 2022 16:09
Aan: FreeBSD Current <freebsd-current@freebsd.org>
Onderwerp: panic: data abort in critical section or under mutex (was: Re: panic: Unknown kernel exception 0 esr_el1 2000000 (on 14-CURRENT/aarch64 Feb 28))
> 
> Hi,
> 
> Another panic while building world/kernel. Different panic message and trace.
>  
>   x0:     1f5e152c32cc                                                                                                       
>   x1: ffff0000b630a000 (g_ctx + b4c4a254)                                                                                           
>   x2:                1                                                                                                              
>   x3:               2e                                                                                                              
>   x4: ffffa000bb46d600                                                                                                              
>   x5:                0                                                                                                              
>   x6:                0  x7: ffff000000f05104 (has_pan + 0)
>   x8:                1
>   x9:         809c227c
>  x10:               bd
>  x11:               40
>  x12:                0
>  x13:                1
>  x14:         1782f000
>  x15:             1001
>  x16:         1782f003
>  x17:     1f5e957392f0
>  x18: ffff00010719e630 (next_index + 2cac528)
>  x19: ffff00010719e768 (next_index + 2cac660)
>  x20:                1
>  x21: ffff0000b630a000 (g_ctx + b4c4a254)
>  x22:                1
>  x23:         ffffffbf
>  x24: ffff00010719e758 (next_index + 2cac650)
>  x25: ffffa00026cdd160
>  x26:                1
>  x27: ffffa000bb46d600
>  x28: ffff00000092815a (do_execve.fexecv_proc_title + 5483)
>  x29: ffff00010719e630 (next_index + 2cac528)
>   sp: ffff00010719e630
>   lr: ffff00000053e890 (uiomove_faultflag + 128)
>  elr: ffff000000804f80 (byte_by_byte + 4)
> spsr:               45
>  far: ffff0000b630a000 (g_ctx + b4c4a254)
>  esr:         96000047
> panic: data abort in critical section or under mutex
> cpuid = 2
> time = 1646489189
> KDB: stack backtrace:
> db_trace_self() at db_trace_self
> db_trace_self_wrapper() at db_trace_self_wrapper+0x30
> vpanic() at vpanic+0x174
> panic() at panic+0x44
> data_abort() at data_abort+0x2a8
> handle_el1h_sync() at handle_el1h_sync+0x10
> --- exception, esr 0x96000047
> byte_by_byte() at byte_by_byte+0x4
> pipe_write() at pipe_write+0x668
> KDB: enter: panic
> [ thread pid 68336 tid 100593 ]
> Stopped at      kdb_enter+0x44: undefined       f901c11f
> db>
> 
> 
> 
> Regards,
> Ronald.
> 
> 
>  
> Van: Ronald Klop <ronald-lists@klop.ws>
> Datum: zaterdag, 5 maart 2022 12:16
> Aan: FreeBSD Current <freebsd-current@freebsd.org>
> Onderwerp: panic: Unknown kernel exception 0 esr_el1 2000000 (on 14-CURRENT/aarch64 Feb 28)
>> 
>> Hi,
>> 
>> Repeated panics on 14-CURRENT/aarch64. This happens e.g. when the nigthly backup is started.
>> # uname -a
>> FreeBSD rpi4 14.0-CURRENT FreeBSD 14.0-CURRENT #22 main-5f702d6d9a: Mon Feb 28 06:12:48 CET 2022     ronald@rpi4:/home/ronald/dev/obj/home/ronald/dev/freebsd/arm64.aarch64/sys/GENERIC-NODEBUG arm64
>> 
>> It was stable with all kernels until (and including) "FreeBSD 14.0-CURRENT #21 main-e11ad014d1-dirty: Sat Feb  5 00:09:08 CET 2022".
>> 
>> It runs ZFS-on-root via an USB disk. No other FS involved.
>> # gpart show
>> =>        40  1953458096  da0  GPT  (931G)
>>           40      102400    1  efi  (50M)
>>       102440     8388608    2  freebsd-swap  (4.0G)
>>      8491048  1944967088    3  freebsd-zfs  (927G)
>> 
>> 
>> Output on serial console:
>> x0: ffffa000059c1380                                                                                                       
>>   x1: ffffa000059b1600                                                                                                              
>>   x2:                3                                                                                                              
>>   x3: ffffa001862779a0                                                                                                              
>>   x4:                0        
>>   x5:    9438238792a1a
>>   x6:    d217e9df58308
>>   x7:               14
>>   x8: ffffa000059c1398
>>   x9:                1
>>  x10: ffffa000059b1600
>>  x11:                2
>>  x12:                1
>>  x13: f2557a42c5b0f240
>>  x14: 1013e6b85a8ecbe4
>>  x15:     24f981889f30
>>  x16: ffff4afedeb89cb8
>>  x17: fffffffffffffff2
>>  x18: ffff0000fe666800 (g_ctx + fcfa6a54)
>>  x19:                0
>>  x20: ffff0000fec41000 (g_ctx + fd581254)
>>  x21:                3
>>  x22: ffff0000419bb090 (g_ctx + 402fb2e4)
>>  x23: ffff000000c09bb7 (lockstat_enabled + 0)
>>  x24:              180
>>  x25: ffff000000c09000 (sdt_vfs_vop_vop_spare1_entry + 28)
>>  x26: ffff000000c09000 (sdt_vfs_vop_vop_spare1_entry + 28)
>>  x27: ffff000000c09000 (sdt_vfs_vop_vop_spare1_entry + 28)
>>  x28:                0
>>  x29: ffff0000fe666800 (g_ctx + fcfa6a54)
>>   sp: ffff0000fe666800
>>   lr: ffff00000154ca38 (zio_dva_throttle + 13c)
>>  elr: ffff00000154ca80 (zio_dva_throttle + 184)
>> spsr:         20000045
>>  far:     1f24979f8000
>> panic: Unknown kernel exception 0 esr_el1 2000000
>> cpuid = 2
>> time = 1646433952
>> KDB: stack backtrace:
>> db_trace_self() at db_trace_self
>> db_trace_self_wrapper() at db_trace_self_wrapper+0x30
>> vpanic() at vpanic+0x174
>> panic() at panic+0x44
>> do_el1h_sync() at do_el1h_sync+0x184
>> handle_el1h_sync() at handle_el1h_sync+0x10
>> --- exception, esr 0x2000000
>> zio_dva_throttle() at zio_dva_throttle+0x184
>> zio_execute() at zio_execute+0x58
>> KDB: enter: panic
>> [ thread pid 0 tid 100128 ]
>> Stopped at      kdb_enter+0x44: undefined       f901c11f
>> db>
>> 
>> 
>> I'm going to build a newer kernel to see if the problem persists. I can keep the current kernel to reproduce this if needed.
>> 
>> Regards,
>> Ronald.
> 
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<html><head></head><body>Hi,<br />
<br />
Did some binary search with kernels from artifact.ci.freebsd.org.<br />
<br />
I suspect &quot;rmlock: Micro-optimize read locking&quot; as cause.<br />
https://cgit.freebsd.org/src/commit/?id=c84bb8cd771ce4bed58152e47a32dda470bef23a<br />
<br />
And &quot;rmlock: Add required compiler barriers to _rm_runlock()&quot; as solution.<br />
https://cgit.freebsd.org/src/commit/?id=89ae8eb74e87ac19aa2d7abe4ba16bcccd32bb9f<br />
<br />
So I probably just had a bad day.<br />
<br />
Regards,<br />
Ronald.<br />
<br />
&nbsp;
<p><strong>Van:</strong> Ronald Klop &lt;ronald-lists@klop.ws&gt;<br />
<strong>Datum:</strong> zaterdag, 5 maart 2022 16:09<br />
<strong>Aan:</strong> FreeBSD Current &lt;freebsd-current@freebsd.org&gt;<br />
<strong>Onderwerp:</strong> panic: data abort in critical section or under mutex (was: Re: panic: Unknown kernel exception 0 esr_el1 2000000 (on 14-CURRENT/aarch64 Feb 28))</p>

<blockquote style="padding-right: 0px; padding-left: 5px; margin-left: 5px; border-left: #000000 2px solid; margin-right: 0px">
<div class="MessageRFC822Viewer" id="P">
<div class="MultipartAlternativeViewer">
<div class="TextHTMLViewer" id="P.P.P">Hi,<br />
<br />
Another panic while building world/kernel. Different panic message and trace.<br />
&nbsp;
<pre style=";white-space: pre-wrap;white-space: pre-wrap;">
  x0:&nbsp;&nbsp;&nbsp;&nbsp; 1f5e152c32cc&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; x1: ffff0000b630a000 (g_ctx + b4c4a254)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; x2:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; x3:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2e&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; x4: ffffa000bb46d600&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; x5:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; x6:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp; x7: ffff000000f05104 (has_pan + 0)
&nbsp; x8:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
&nbsp; x9:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 809c227c
&nbsp;x10:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; bd
&nbsp;x11:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 40
&nbsp;x12:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0
&nbsp;x13:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
&nbsp;x14:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1782f000
&nbsp;x15:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1001
&nbsp;x16:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1782f003
&nbsp;x17:&nbsp;&nbsp;&nbsp;&nbsp; 1f5e957392f0
&nbsp;x18: ffff00010719e630 (next_index + 2cac528)
&nbsp;x19: ffff00010719e768 (next_index + 2cac660)
&nbsp;x20:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
&nbsp;x21: ffff0000b630a000 (g_ctx + b4c4a254)
&nbsp;x22:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
&nbsp;x23:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ffffffbf
&nbsp;x24: ffff00010719e758 (next_index + 2cac650)
&nbsp;x25: ffffa00026cdd160
&nbsp;x26:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
&nbsp;x27: ffffa000bb46d600
&nbsp;x28: ffff00000092815a (do_execve.fexecv_proc_title + 5483)
&nbsp;x29: ffff00010719e630 (next_index + 2cac528)
&nbsp; sp: ffff00010719e630
&nbsp; lr: ffff00000053e890 (uiomove_faultflag + 128)
&nbsp;elr: ffff000000804f80 (byte_by_byte + 4)
spsr:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 45
&nbsp;far: ffff0000b630a000 (g_ctx + b4c4a254)
&nbsp;esr:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 96000047
panic: data abort in critical section or under mutex
cpuid = 2
time = 1646489189
KDB: stack backtrace:
db_trace_self() at db_trace_self
db_trace_self_wrapper() at db_trace_self_wrapper+0x30
vpanic() at vpanic+0x174
panic() at panic+0x44
data_abort() at data_abort+0x2a8
handle_el1h_sync() at handle_el1h_sync+0x10
--- exception, esr 0x96000047
byte_by_byte() at byte_by_byte+0x4
pipe_write() at pipe_write+0x668
KDB: enter: panic
[ thread pid 68336 tid 100593 ]
Stopped at&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; kdb_enter+0x44: undefined&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; f901c11f
db&gt;

</pre>
<br />
Regards,<br />
Ronald.<br />
<br />
<br />
&nbsp;
<p><strong>Van:</strong> Ronald Klop &lt;ronald-lists@klop.ws&gt;<br />
<strong>Datum:</strong> zaterdag, 5 maart 2022 12:16<br />
<strong>Aan:</strong> FreeBSD Current &lt;freebsd-current@freebsd.org&gt;<br />
<strong>Onderwerp:</strong> panic: Unknown kernel exception 0 esr_el1 2000000 (on 14-CURRENT/aarch64 Feb 28)</p>

<blockquote style="padding-right: 0px; padding-left: 5px; margin-left: 5px; border-left: #000000 2px solid; margin-right: 0px">
<div class="MessageRFC822Viewer" id="P">
<div class="MultipartAlternativeViewer">
<div class="TextHTMLViewer" id="P.P.P">Hi,<br />
<br />
Repeated panics on 14-CURRENT/aarch64. This happens e.g. when the nigthly backup is started.
<pre style=";white-space: pre-wrap;white-space: pre-wrap;white-space: pre-wrap;white-space: pre-wrap;">
# uname -a
FreeBSD rpi4 14.0-CURRENT FreeBSD 14.0-CURRENT #22 main-5f702d6d9a: Mon Feb 28 06:12:48 CET 2022     ronald@rpi4:/home/ronald/dev/obj/home/ronald/dev/freebsd/arm64.aarch64/sys/GENERIC-NODEBUG arm64</pre>
<br />
It was stable with all kernels until (and including) &quot;FreeBSD 14.0-CURRENT #21 main-e11ad014d1-dirty: Sat Feb&nbsp; 5 00:09:08 CET 2022&quot;.<br />
<br />
It runs ZFS-on-root via an USB disk. No other FS involved.
<pre style=";white-space: pre-wrap;white-space: pre-wrap;white-space: pre-wrap;white-space: pre-wrap;">
# gpart show
=&gt;        40  1953458096  da0  GPT  (931G)
          40      102400    1  efi  (50M)
      102440     8388608    2  freebsd-swap  (4.0G)
     8491048  1944967088    3  freebsd-zfs  (927G)</pre>
<br />
<br />
Output on serial console:
<pre style=";white-space: pre-wrap;white-space: pre-wrap;white-space: pre-wrap;white-space: pre-wrap;">
x0: ffffa000059c1380&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; x1: ffffa000059b1600&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; x2:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; x3: ffffa001862779a0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; x4:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
&nbsp; x5:&nbsp;&nbsp;&nbsp; 9438238792a1a
&nbsp; x6:&nbsp;&nbsp;&nbsp; d217e9df58308
&nbsp; x7:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 14
&nbsp; x8: ffffa000059c1398
&nbsp; x9:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
&nbsp;x10: ffffa000059b1600
&nbsp;x11:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2
&nbsp;x12:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
&nbsp;x13: f2557a42c5b0f240
&nbsp;x14: 1013e6b85a8ecbe4
&nbsp;x15:&nbsp;&nbsp;&nbsp;&nbsp; 24f981889f30
&nbsp;x16: ffff4afedeb89cb8
&nbsp;x17: fffffffffffffff2
&nbsp;x18: ffff0000fe666800 (g_ctx + fcfa6a54)
&nbsp;x19:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0
&nbsp;x20: ffff0000fec41000 (g_ctx + fd581254)
&nbsp;x21:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3
&nbsp;x22: ffff0000419bb090 (g_ctx + 402fb2e4)
&nbsp;x23: ffff000000c09bb7 (lockstat_enabled + 0)
&nbsp;x24:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 180
&nbsp;x25: ffff000000c09000 (sdt_vfs_vop_vop_spare1_entry + 28)
&nbsp;x26: ffff000000c09000 (sdt_vfs_vop_vop_spare1_entry + 28)
&nbsp;x27: ffff000000c09000 (sdt_vfs_vop_vop_spare1_entry + 28)
&nbsp;x28:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0
&nbsp;x29: ffff0000fe666800 (g_ctx + fcfa6a54)
&nbsp; sp: ffff0000fe666800
&nbsp; lr: ffff00000154ca38 (zio_dva_throttle + 13c)
&nbsp;elr: ffff00000154ca80 (zio_dva_throttle + 184)
spsr:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 20000045
&nbsp;far:&nbsp;&nbsp;&nbsp;&nbsp; 1f24979f8000
panic: Unknown kernel exception 0 esr_el1 2000000
cpuid = 2
time = 1646433952
KDB: stack backtrace:
db_trace_self() at db_trace_self
db_trace_self_wrapper() at db_trace_self_wrapper+0x30
vpanic() at vpanic+0x174
panic() at panic+0x44
do_el1h_sync() at do_el1h_sync+0x184
handle_el1h_sync() at handle_el1h_sync+0x10
--- exception, esr 0x2000000
zio_dva_throttle() at zio_dva_throttle+0x184
zio_execute() at zio_execute+0x58
KDB: enter: panic
[ thread pid 0 tid 100128 ]
Stopped at&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; kdb_enter+0x44: undefined&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; f901c11f
db&gt;

</pre>
I'm going to build a newer kernel to see if the problem persists. I can keep the current kernel to reproduce this if needed.<br />
<br />
Regards,<br />
Ronald.</div>
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