[Bug 253158] Panic: snapacct_ufs2: bad block - Non-suJ mksnap_ffs(8) crash

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253158

--- Comment #22 from Cy Schubert <cy at FreeBSD.org> ---
No joy.

(kgdb) frame 12
#12 0xffffffff80f22e57 in ffs_read (ap=<optimized out>) at
/opt/src/vm64/sys/ufs/ffs/ffs_vnops.c:789
789                             error = vn_io_fault_pgmove(bp->b_pages,
blkoffset,
(kgdb) info args
ap = <optimized out>
(kgdb) info locals
vp = <optimized out>
uio = 0xfffffe00882928b0
ioflag = 0
ip = <optimized out>
seqcount = 0
orig_resid = <optimized out>
fs = <optimized out>
bp = <optimized out>
error = 0
bflag = 72
bytesinfile = <optimized out>
lbn = <optimized out>
nextlbn = <optimized out>
size = 32768
blkoffset = 0
xfersize = 32768
(kgdb) p *fs
value has been optimized out
(kgdb) p *ip
value has been optimized out
(kgdb) p *bp
value has been optimized out
(kgdb) 

We'll need to build a -O0 kernel.

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