NetBSD Problem Report #55092
From martin@duskware.de Sat Mar 21 08:28:32 2020
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From: martin@NetBSD.org
Reply-To: martin@NetBSD.org
To: gnats-bugs@NetBSD.org
Subject: swap on NFS file panic
X-Send-Pr-Version: 3.95
>Number: 55092
>Category: kern
>Synopsis: swap on NFS file panic
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sat Mar 21 08:30:00 +0000 2020
>Originator: Martin Husemann
>Release: NetBSD 9.99.50
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD unpluged.duskware.de 9.99.50 NetBSD 9.99.50 (UNPLUGED) #298: Fri Mar 20 17:13:09 CET 2020 martin@seven-days-to-the-wolves.aprisoft.de:/work/src/sys/arch/evbarm/compile/UNPLUGED evbarm
Architecture: earm
Machine: evbarm
>Description:
This is a diskless machine, root on NFS, swap to file on NFS.
# swapctl -l
Device 1K-blocks Used Avail Capacity Priority
/swap 1048576 0 1048576 0% 0
It did run a full ATF test when I left it last night, and apparently completed
that (full results where available on the NFS server this morning), but some
time later (or during the nightly run?) paniced strangely:
db> show panic
Panic string: (null)
db> bt
0xd4c6eedc: netbsd:uao_set_swslot+0x10
0xd4c6eef4: netbsd:uvmpd_dropswap+0x58
0xd4c6efac: netbsd:uvm_pageout+0x30c
db> c
panic: Fatal abort
[ 39473.8783146] cpu0: Begin traceback...
[ 39473.8783146] 0xd4c6ecdc: netbsd:db_panic+0x14
[ 39473.8783146] 0xd4c6ecf4: netbsd:vpanic+0x11c
[ 39473.8783146] 0xd4c6ed0c: netbsd:snprintf
[ 39473.8783146] 0xd4c6ed44: netbsd:dab_fatal+0x120
[ 39473.8783146] 0xd4c6ed7c: netbsd:dab_align+0xa4
[ 39473.8783146] 0xd4c6ee4c: netbsd:data_abort_handler+0x2a8
[ 39473.8783146] 0xd4c6eedc: netbsd:address_exception_entry+0x58
[ 39473.8783146] 0xd4c6eef4: netbsd:uvmpd_dropswap+0x58
[ 39473.8783146] 0xd4c6efac: netbsd:uvm_pageout+0x30c
[ 39473.8783146] cpu0: End traceback...
[ 39473.8783146] rebooting...
I have seen the same (but did not capture details) after last weeks test
run, but never before.
>How-To-Repeat:
n/a
>Fix:
n/a
(Contact us)
$NetBSD: query-full-pr,v 1.46 2020/01/03 16:35:01 leot Exp $
$NetBSD: gnats_config.sh,v 1.9 2014/08/02 14:16:04 spz Exp $
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