Comment 10 for bug 709392

As far as I can see, this really is an issue of the NFS v3/v4 client (filesystem driver in the kernel). I do not find any code that would change the new UNSTABLE/COMMIT behavior (which is the new default since NFSv3) back to the FILE_SYNC mode that was the default in NFSv2.

However, reading documents about O_SYNC, I would also think that this should be switching modes. For the test case of writing out a single block, I could see the old mode turned on when using O_DIRECT as well. But looking at the code, this is rather related to the small amount of bytes written than checking the O_SYNC flag in any way.

So this bug report should be targeted against the kernel package (the reason I do not do it right now is that I am not sure whether we should keep the nfs-utils reference but mark it invalid or replace it by the kernel package).

As this needs to get fixed upstream, I will open a bugzilla there an later link it to this bug report.