https://bugs.winehq.org/show_bug.cgi?id=43247
--- Comment #2 from Olivier F. R. Dierick o.dierick@piezo-forte.be --- I have around 3.2GB free on / before starting the game. It consumes all that space at a 110MB/minute rate. The low disk space notification appears on top of the game which is already annoying by itself. When the disk is full subprocess.exe crashes and an exception dialog pops-up. The game still runs fine, apparently.
mount shows several tmpfs mounts. I could not find any anonmap.XXXXXX files in /tmp, but lsof showed a few anonmap.* files (of type DEL) opened by subprocess.exe.
I use df to check disk space. The available space decreases steadily as the used space increases. The command du doesn't show any change in disk usage. This indicates that the space is not used by standard files, IMO.
subprocess.exe is the CEF browser helper executable, similar to steamwebhelper.exe or UplayWebCore.exe. It provides the on-line "social" services. I tested another game (Team Fortress 2 on Steam) and it had no issue. I never noticed such disk space consumption before.