Some proton utility commands hang when running on nfs

Setup:

• Updated Fedora 28 x86_64
  • mesa 18.0.5
• Intel Corporation HD Graphics 5500

If I install the game to my local disk (~/.local/share/Steam) Starwars Battlefront II (and others) runs fine.

I have an autofs/nfs share (/net/berrier/steam) on another computer (backed by a 32bit xfs filesystem) and when I run a proton game (I've verified this with a few proton games), the following commands hang indefinitely:

python2.7 /net/berrier/steam/steamapps/steamapps/common/Proton 3.7/proton run /home/wberrier/.local/share/Steam/legacycompat/iscriptevaluator.exe --get-current-step 6060
python2.7 /net/berrier/steam/steamapps/steamapps/common/Proton 3.7/proton getcompatpath /net/berrier/steam/steamapps/steamapps/common/Star Wars Battlefront II

As a sidenote, I can run steam under wine and access this same nfs share just fine. I really think it's something with the utility commands that are hanging with this setup.

I've also seen this behavior on a machine running Fedora 27.

Start by reproducing the two Proton utility commands shown in the report, comparing the NFS path with the local Steam path. Trace the Proton script entry point and its handling of getcompatpath and run, then identify why the commands block on NFS. Done means both commands complete reliably with the reported NFS setup.