From: Trond Myklebust <trond.myklebust@fys.uio.no>
Subject: Re: read(2) hangs on the client side
Date: Sun, 08 May 2005 09:59:25 -0400
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To: Haakon Riiser <haakon.riiser@fys.uio.no>
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su den 08.05.2005 Klokka 15:21 (+0200) skreiv Haakon Riiser:

> > Are oplocks enabled on the Samba server?
> 
> Probably.  I haven't touched the oplock setting, but according
> to smb.conf(5), kernel oplocks are enabled by default, and they
> translate to no-ops when the kernel doesn't support them.  How do
> I determine if I have kernel support?

Kernel support for oplocks has been in Linux since version 2.4 - see the
"lease" locks on the fcntl manpage. They haven't been maintained for
quite some while, though until Andy started working on the NFSv4 server
delegation code (in 2.6.11 or so).

Anyhow, try turning oplocks off in smb.conf and see if the hangs
disappear.

Cheers,
  Trond



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