Two questions:

(1) What is the minimum cache size one can specify in venus-setup (the 
value of "cacheblocks" in /etc/code/venus.conf)?

(2) I originally had my system configured with ~ 20 meg cache 
(cacheblocks = 20000), everything is working fine. I changed the cache 
size to 4092, restarted venus using -init, and ti will run successfully 
for a bit--before it coredumps with the following backtrace (from gdb):

(gdb) bt
#0  0x420292e5 in sigsuspend () from /lib/i686/libc.so.6
#1  0x080ae5ad in SigChoke (sig=11) at sighand.cc:242
#2  <signal handler called>
#3  rec_olist::first (this=0x20081f08) at rec_olist.cc:147
#4  0x080e4dfe in rec_olist_iterator::operator() (this=0x81b4650)
    at rec_olist.cc:218
#5  0x080e54ab in rec_ohashtab_iterator::operator() (this=0x15089ed8)
    at rec_ohash.cc:239
#6  0x0809211e in volrep_iterator::operator() (this=0x15089ed8)
    at venusvol.cc:2773
#7  0x080929a3 in vdb::TakeTransition (this=0x20083f88) at vol_daemon.cc:233
#8  0x080925bd in VolDaemon () at vol_daemon.cc:102
#9  0x080a4d10 in vproc::main (this=0x812a068) at vproc.cc:429
#10 0x080a459a in VprocPreamble (init_lock=0x812a0a8) at vproc.cc:146
#11 0x400999be in Create_Process_Part2 () at lwp.c:792

It crashes with signal 11:
18:32:16 Fatal Signal (11); pid 7430 becoming a zombie...
18:32:16 You may use gdb to attach to 7430
18:33:13 RecovTerminate: clean shutdown

As you can see from the tail of venus.log below, it seems to crash in 
BeginRvmFlush(). I really need to decrease my cache size to the absolute 
minimum Coda allows for an experiment we are doing.

The tail of /usr/coda/etc/venus.log is below. thanks for whatever 
insight, everyone.

 W(19) : 0000 : 18:32:14 ] fsobj::StatusEq: 
((0x7f000000.0x30ce2.0x6245)), LinkCount 0 != 1
[ W(19) : 0000 : 18:32:14 ] Cachefile::SetLength 1670480
[ W(19) : 0000 : 18:32:15 ] fsobj::StatusEq: 
((0x7f000000.0x30cf2.0x6246)), LinkCount 0 != 1
[ W(19) : 0000 : 18:32:15 ] Cachefile::SetLength 702  
[ W(19) : 0000 : 18:32:15 ] Cachefile::SetLength 703
[ W(19) : 0000 : 18:32:15 ] Cachefile::SetLength 702  
[ W(19) : 0000 : 18:32:15 ] Cachefile::SetLength 1024
[ W(19) : 0000 : 18:32:15 ] Cachefile::SetLength 1024
[ W(19) : 0000 : 18:32:15 ] Cachefile::SetValidData 691
[ W(19) : 0000 : 18:32:15 ] Cachefile::SetLength 1536  
[ W(19) : 0000 : 18:32:15 ] Cachefile::SetValidData 2752
[ W(19) : 0000 : 18:32:15 ] Cachefile::SetValidData 8668
[ W(19) : 0000 : 18:32:15 ] Cachefile::SetValidData 4316
[ W(19) : 0000 : 18:32:15 ] Cachefile::SetValidData 0 
[ W(19) : 0000 : 18:32:15 ] Cachefile::SetValidData 2853
[ W(19) : 0000 : 18:32:15 ] Cachefile::SetLength 1024
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 240
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 0 
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 2718
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 273
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 0
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 3987
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 16328
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 1932
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 243
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 250
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 0
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 125
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 259
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 0
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 51
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 395
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 0
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetValidData 3323
[ W(19) : 0000 : 18:32:16 ] Cachefile::SetLength 23480

[ T(01) : 0040 : 18:32:16 ] BeginRvmFlush (2, 150476, S)

[ V(04) : 0041 : 18:32:16 ] *****  FATAL SIGNAL (11) *****
[ V(04) : 0041 : 18:33:13 ] TERM: About to terminate venus
[ V(04) : 0041 : 18:33:13 ] BeginRvmFlush (2, 150476, F)

[ X(00) : 0000 : 18:33:13 ] Venus exiting
[ X(00) : 0000 : 18:33:13 ] BeginRvmFlush (3, 153228, F)

[ T(01) : 0040 : 18:33:13 ] EndRvmFlush

[ V(04) : 0041 : 18:33:13 ] EndRvmFlush