Optimal debug options for kernel config ?

[Robin P. Blanchard]

Was fooling around with adding more debugging elements to my dfly kernel
which led me to wonder exactly what options are most desirable for testing in
this phase of dfly ? By adding:
+options                DEBUG_LOCKS
+options                DEBUG_VFS_LOCKS
+options                SIMPLELOCK_DEBUG
+options                VFS_BIO_DEBUG
+options                DEBUG_INTERRUPTS

I locked the box at boot with the below. Overkill or useful ?

[snip]
Starting sshd.
getblk: vmioing file type 4???
panic: biodone: zero vnode ref count
panic(0,cc96cef0,38,cbfe7d0c,c01f72c5) at panic+0x88
panic(c02f60fc,0,cc96cef0,38,800) at panic+0x88
biodone(c11de360,cc96cfa8,c11de360,c018ae08,c6709838) at biodone+0x12d
ad_interrupt(c6709838,c0fe1560,cbfe7d64,c02b9f23,c7fc9200) at
ad_interrupt+0x3f5

ata_intr(c7fc9200,68c040,0,e,cbfe7d84) at ata_intr+0xcd
intr_mux(c0361fd8) at intr_mux+0x23
ithread_handler(e,0,0,0,0) at ithread_handler+0x47
lwkt_exit() at lwkt_exit
Debugger("panic")
Stopped at      Debugger+0x35:  movb    $0,in_Debugger.342
db> tr
Debugger(cbfe7cc8,c01cd00b,c02f252d,0,cc96cef0) at Debugger+0x35
dumpmag(73252228,a2922,0,0,0) at dumpmag+0x1b9
db> cont

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Robin P. Blanchard
Systems Integration Specialist
Georgia Center for Continuing Education
fon: 706.542.2404 < > fax: 706.542.6546
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