On Thu, 2011-12-01 at 14:52 +0100, Mirco Bauer wrote: > tags 633526 + patch > retitle 633526 NFS client uid/gid cache broken on VServer kernels > thanks > > Herbert Poetzl wrote: > > > we now understand the problem, and it was fixed for > > 3.0.4 with the following patch: > > > > http://vserver.13thfloor.at/ExperimentalT/delta-nfs-fix02.diff > > I can confirm that this patch is fixing the issue. I have tested the patch on top of linux-2.6 2.6.32-37 on a production server > and we no longer experience the NFS uid/gid issue. > > The issue can easily be tested by doing "ls -l $file" on a NFS mount. The values will show up correctly. > After "cat $file > /dev/null; ls -l $file" it will suddenly show wrong uid/gid values of: 4294967294/4294967294 (-2/-2) > Waiting for about 20 seconds "ls -l $file" will show again correct values. So the client cached values are clearly the problem. > > I strongly recommend to include the patch into the next stable point release as this is major NFS regression from Debian Lenny. I'll update to vs2.6.32.48-vs2.3.0.36.29.8 which includes the above and one other NFS fix <http://vserver.13thfloor.at/ExperimentalT/delta-nfs-fix01.diff>. Herbert, if you could briefly explain what the two changes are doing that would be helpful. Ben. -- Ben Hutchings Computers are not intelligent. They only think they are.
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