[issue1125] panic: assertion: iou->io.lock.refs == 0 in hammer_io_inval

[Thomas Nikolajsen <sinknull@xxxxxxxxxxxxxxxxxxxxxxx>]

Thomas Nikolajsen <thomas.nikolajsen@mail.dk> added the comment:

I have no problem reproducing this panic.

Generated another crash dump using GENERIC kernel
(might be easier to debug: HAMMER not loaded as module):
Crash dump on leaf in crash/hammer/ask/*.11.

Also tried another host as nfs server: minimal setup:
 - fresh HAMMER file system, with just one PFS (#1)
 - data for /usr/src cpdup'ed from other nfs server
 - empty /usr/obj
 - more RAM (512MB vs 128MB)
Got same panic, after a few minutes of buildworld;
crash dump avail. on request (200MB).

It seems like I get this panic when using write intensive operations
on nfs mounts. Read mostly operations doesn't trigger bug.

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priority:  -> bug

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