git <8f6576a> Causes non-interruptible stalls in NFS clients

Merge: 8f6576a cc0a984
Author: Linus Torvalds
Date: Tue May 29 10:43:51 2012 -0700

Merge tag 'nfs-for-3.5-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client updates from Trond Myklebust:

- Improve the code sharing between NFSv2/v3 and v4 mounts

That last comment gave me the idea to enable NFSv4 client support in my kernel (which I had disabled many months ago because of NFSv4 weirdness).

Enabling NFSv4 client support completely fixed the non-interruptible NFS stalls and, strangely, also fixed the very similar stalls in my scp/sftp clients when pushing files > 800KB or so.

Enabling the NFSv4 client support fixes everything even though I'm still using NFSv3 mounts explicitly/exclusively.