Re: Sun Blade 1500 running Solaris 10 11/06 is choking in ufs code

Hello,

I have at least one silly question to ask: why are you trying to debug
this?

to evolve. To learn. To get as many views as I can on the same thing.

You're using one of the commercial distributions of Solaris (Solaris
10) rather than the newer OpenSolaris-based distributions, so you
should be reporting a problem like this to Sun's support group.

Oh guess what? I opened the call 7 days ago. A lot of chip-chap and
speculation on my side (which turned out as wrong) but nothing that
fixes the problem until now. But I look forward on resolving the issue.

I think you might be missing priority inheritance. When a higher-
priority thread needs a lock held by a lower-priority thread, the
lower-priority one is temporarily elevated so that it can run to
completion and allow the higher-priority task to acquire the lock.

I didn't miss it. And I know what priority inheritance is. But my
question was if Solaris does it handle it that way. After looking at the
source code of Solaris it more liks like priority inversion. However
that was bull*** anyway. Because the second thread that I saw, the one
with the high priotity, was me myself pressing Alternate break sequence
and end up in the kernel debugger (in that case the stack frame seems to
get dupplicated by the interrupt handler).

If you're interested in the crash dumps, raise the word and I put them
online in a matter of seconds.

Thomas
.