On Tue, Dec 13, 2011 at 07:03:45AM +0000, Ben Hutchings wrote: > 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. well, the first one fixes a long outstanding bug, which was caused by using the wrong macros INOTAG_* instead of TAGINO_*, which, depending on the tagging and actual uid/gid/tag will result in funny numbers ... the second one doesn't fix any real issue, but it is a more defensive solution for the potentially possible case where NFS_ATTR_FATTR_OWNER is set but the group nfs attribute is not (or the other way round) HTH, Herbert > Ben. > -- > Ben Hutchings > Computers are not intelligent. They only think they are. -- To UNSUBSCRIBE, email to debian-kernel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20111213180419.ga8...@mail.13thfloor.at
