[Samba] oplock not working correctly

Jeremy Allison jra at samba.org
Thu Apr 27 14:15:41 GMT 2006

On Thu, Apr 27, 2006 at 01:21:18PM +0200, Iain wrote:
> I posted a problem with oplock previously, but am guessing it goto lost
> in an earlier thread with the same subject line, so here goes another shot:
> Using Samba 3.0.22 on a Gentoo box (kernel 2.6.15) I've a situation
> where file locking does not seem to be functioning as expected, in that
> more than one user can open and write to a file without any
> notifications being displayed about the file already being opened by
> another user.
> In the debug output below I have two Windows XP clients accessing the
> same shared file, neteng02 has the file open. neteng-vm3 then opens the
> same file, receiving no warnings about the file being open by another
> user. File is modified by neteng02 and saved and remains open. File then
> modified by neteng-vm3 and saved. File closed and opened by neteng02 who
> sees only modifications made by neteng-vm3.

Can you try adding "kernel oplocks = no" to the smb.conf ? I've had
a report that the Fedora Core 5 kernel has broken kernel oplocks and
I'm trying to find out if this is a Fedora specific problem or in the
general kernel.org code.


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