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Date:      Mon, 11 Oct 2010 10:40:11 -0500
From:      "Sam Fourman Jr." <sfourman@gmail.com>
To:        Andriy Gapon <avg@icyb.net.ua>
Cc:        freebsd-fs@freebsd.org
Subject:   Re: Locked up processes after upgrade to ZFS v15
Message-ID:  <AANLkTikCDxxqf1v9VOMqKZP7wNimq=6fFLDdyDGMDXQ6@mail.gmail.com>
In-Reply-To: <4CB32C75.2060000@icyb.net.ua>
References:  <39F05641-4E46-4BE0-81CA-4DEB175A5FBE@free.de> <20101009111241.GA58948@icarus.home.lan> <CF901B53-657E-49FC-A43B-27BC7D49F7A7@free.de> <4CB17983.3020907@icyb.net.ua> <20101011151508.GA10917@icarus.home.lan> <4CB32C75.2060000@icyb.net.ua>

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> Jeremy,
>
> were are in a process of debugging this issue with Kai and I think that w=
e are
> onto something. =A0I would like to ask you for some additional testing.
>
> What kind of workload do your run?
> Do you have anything using sendfile(2)? =A0E.g. Apache with EnableSendfil=
e enabled
> (it might be by default, without explicit options).
> Can you try to disable sendfile(2) use, reboot and see how system behaves=
?
>
> If you still experience the same problem after doing the above, then I'd =
like to
> ask you for shell access with root privileges; or establishing communicat=
ion via
> IM and running some commands for me.
>
> Thank you!
> --
> Andriy Gapon
> _______________________________________________


Andriy,

I am not sure if this is the same issue, but
I have a similar problem running FreeBSD 9-CURRENT amd64 (sources as
of 1 hour ago)
a zfs lockup appears very frequently, it is a NFS server it locks up
several times per day.

I have been having these issues since before the ZFSv15 patch was
committed to HEAD a few months ago.
let me know if you need details, I have no problems giving you root
ssh on this machine... but it does  not have a serial port.
so I am not sure how useful it would be.

--=20

Sam Fourman Jr.
Fourman Networks
http://www.fourmannetworks.com



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