Consistent crash of BeagleBone kernel
Tim Kientzle
tim at kientzle.com
Sun Aug 9 00:24:40 UTC 2015
I’m seeing the following crash quite consistently on r286438. It looks like the recent work on the kernel linker locking still has some issues.
Any suggested workarounds?
Tim
==== log trace ===
...
Starting file system checks:
/dev/mmcsd0s2a: FILE SYSTEM CLEAN; SKIPPING CHECKS
/dev/mmcsd0s2a: clean, 7320851 free (179 frags, 915084 blocks, 0.0% fragmentation)
lock order reversal:
1st 0xcd225040 bufwait (bufwait) @ /Users/tim/projects/crochet/src-head/sys/kern/vfs_bio.c:3191
2nd 0xc2e69400 dirhash (dirhash) @ /Users/tim/projects/crochet/src-head/sys/ufs/ufs/ufs_dirhash.c:281
… usual stack trace omitted ...
Mounting local file systems:random: unblocking device.
.
ELF ldconfig path: /lib /usr/lib /usr/lib/compat
Setting hostname: beaglebone.
Setting up harvesting:[HIGH_PERFORMANCE],[FS_ATIME],SWI,INTERRUPT,NET_NG,NET_ETHER,NET_TUN,MOUSE,KEYBOARD,ATTACH,CACHED
Feeding entropy:.
lock order reversal:
1st 0xc083ef40 kernel linker (kernel linker) @ /Users/tim/projects/crochet/src-head/sys/kern/kern_linker.c:1030
2nd 0xc2d63c94 ufs (ufs) @ /Users/tim/projects/crochet/src-head/sys/kern/vfs_lookup.c:529
KDB: stack backtrace:
panic: _sx_xlock_hard: recursed on non-recursive sx kernel linker @ /Users/tim/projects/crochet/src-head/sys/kern/kern_linker.c:552
KDB: enter: panic
[ thread pid 168 tid 100079 ]
Stopped at $d.7: ldrb r15, [r15, r15, ror r15]!
db> bt
Tracing pid 168 tid 100079 td 0xc30db6a0
panic: _sx_xlock_hard: recursed on non-recursive sx kernel linker @ /Users/tim/projects/crochet/src-head/sys/kern/kern_linker.c:552
Uptime: 4m0s
Rebooting...
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