* [9fans] more info on fossil crashes
@ 2003-07-15 0:51 andrey mirtchovski
0 siblings, 0 replies; only message in thread
From: andrey mirtchovski @ 2003-07-15 0:51 UTC (permalink / raw)
To: 9fans
[-- Attachment #1: Type: TEXT/PLAIN, Size: 1518 bytes --]
The little script attached in this email manages to crash my fossil server
with 100% reproducibility (i.e. 5 out of 5, I got sick of rebooting so I'm
not trying anymore).
The error message on the console is:
[heavy io]
disk: io=10000 at 0.991ms
assert failed: b->nlock == 1
fossil 44: suicide: sys: trap: fault read addr=0x0 pc=0x0002b5af
[here I usually reboot]
The machine does not panic, it simply becomes unusable.
The attachment: the attached archive includes a small program that I use to
extract subfonts from a .bdf font file. It's a modified version of Skip
Tavakkolian's bdf2subf. Also included is a sample .bdf file. The script
'runtest' will extract all glyphs from the .bdf file and save them in
files named according to the range the subfont covers; after the extraction
is complete the script will attempt to detele all subfont files and will
cause my fossil to crash.
Symptoms: I don't seem to lose any other data. Before deletion there are
5000+ files in the directory. After a reboot I usually find around 1600
still remaining.
Setup: I run fossil over a two-disk mirror using devfs, the disks it mirrors
to are 80GB Matrox IDE disks set up as sdC0 and sdD0, running with UDMA4.
Debugging: Had a brief look at /sys/src/cmd/fossil/cache.c (where the nlock
mangling occurs, the assert fails in disk.c) but the code looks like it's in
a working state still -- so here's reporting the error to those who know how
to fix it better than I do.
cheers, andrey
[-- Attachment #2.1: Type: text/plain, Size: 416 bytes --]
The following attachment had content that we can't
prove to be harmless. To avoid possible automatic
execution, we changed the content headers.
The original header was:
Content-Type: APPLICATION/X-GZIP; NAME="rmtest.tgz"
Content-Transfer-Encoding: BASE64
Content-ID: <Pine.LNX.4.44.0307141842000.29555@fbsd.cpsc.ucalgary.ca>
Content-Description:
Content-Disposition: ATTACHMENT; FILENAME="rmtest.tgz"
[-- Attachment #2.2: rmtest.tgz.suspect --]
[-- Type: application/octet-stream, Size: 488533 bytes --]
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2003-07-15 0:51 [9fans] more info on fossil crashes andrey mirtchovski
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