8.1-RELEASE ZFS hangs

[Sergey Zaharchenko]

Hello list, hello Pawel,

I'm observing a reproducible (a matter of seconds) ZFS `deadlock'. This
is on an 8.1-RELEASE amd64 quad-core system with 8G of RAM. It takes a
few writes/syncs to the filesystem to make it unusable ('bonnie++ -f'
works). Processes are stuck in states like zio->..., zil->..., etc.

Looks like I'm not the only one:
http://lists.freebsd.org/pipermail/freebsd-stable/2010-August/058362.html

My problem is described more detailedly in:
http://lists.freebsd.org/pipermail/freebsd-stable/2010-September/058665.html

Please tell me if there's anything else that you need. I can file a PR
if you prefer it that way...

Thanks,

-- 
Sergey Zaharchenko
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