Files
FEX-Emu--FEX/Source/Tools/FEXMountDaemon
Ryan Houdek a6c4ad889b FEXMountDaemon: Make squashfs mounting more robust
Instead of watching to ensure our parent process is still alive. Mount the
squashfs once and use a combination of file leases and inotify to
ref count how many processes are using the rootfs.

This makes it so in the common case, the FEXMountDaemon only ever executes once
and runs until all FEX processes stop running.
In the rare edge case there is a race condition where multiple FEXMountDaemon
applications will start, but only one will end up mounting the squashfs.
In this case, one application wins and the one that failed to grab the lease
will wait until the other one completes.

With this change, squashfs should be reasonable to use now.
2021-07-29 21:45:30 -07:00
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