panic: ffs_blkfree: freeing free block
Mikhail Teterin
mi+mx at aldan.algebra.com
Thu Oct 21 11:53:50 PDT 2004
Hello!
After suffering through
http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/72451
and experiencing occasional ufs2 panics (rather than the usual system hangs),
we recreated the troublesome partition as ufs1 without softupdates, with
other newfs parameters being default.
We also set the mpsafenet and mpsafevm to 0, as it seemed to have helped
increase the system's uptime in the past.
Under the load, the system eventually paniced with: 'ffs_blkfree: freeing free
block'. The stack was:
ffs_blkfree+0x433
ffs_indirtrunc+0x37c
ffs_indirtrunc+0x33c
ffs_truncate+0xd24
ufs_inactive+0x1d7
vput+0x113
kern_unlink+0x129
unlink+0x3e
The machine runs fresh amd64-current on a single Opteron in a dual capable
Tyan K8W motherboard. The troublesome harddrive is connected directly to the
on-board SATA connector at SATA150 speed. We went through two drives, two
SATA cables, already, and tried other on-board SATA connectors.
Is this panic just as likely to hit us if we go back to RELENG_5? Could the
bug be stemming from some unsafeness in ata's reset/reinit code -- testing
these must be painfully difficult, I understand.
Thanks!
-mi
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