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Commit 5c083d64 authored by Simon McVittie's avatar Simon McVittie
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docs: Update description of --devel to reflect merged MRs

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......@@ -498,11 +498,24 @@ $ /path/to/steamlibrary/steamapps/common/SteamLinuxRuntime_soldier/run \
Exporting `PRESSURE_VESSEL_DEVEL=1` is equivalent to using the `--devel`
option.
At the moment, this option mounts `/sys` read-write instead of read-only,
so that game developers can use advanced profiling and debugging mechanisms
that might require writing to `/sys/kernel` or similar pseudo-filesystems.
Currently, the features enabled by this option are:
It is likely to do more in future pressure-vessel releases.
* The standard input file descriptor is inherited from the parent
process, the same as `--terminal=tty`.
This is useful when running an interactive shell like `bash`, or a
game that accepts developer console commands on standard input.
* `/sys` is mounted read-write instead of read-only, so that game
developers can use advanced profiling and debugging mechanisms that
might require writing to `/sys/kernel` or similar pseudo-filesystems.
This option is a recent addition and is not present in all container
runtimes yet.
If it is not available in your current version of the Steam Linux Runtime,
one option is to [upgrade pressure-vessel][Upgrading pressure-vessel]
to a version that has this option.
This option is likely to have more effects in future pressure-vessel releases.
## Running in a SDK environment
......@@ -551,6 +564,8 @@ environment.
## Upgrading pressure-vessel
[Upgrading pressure-vessel]: #upgrading-pressure-vessel
The recommended version of `pressure-vessel` is the one that is included
in the *Steam Linux Runtime - soldier* depot, and other versions are
not necessarily compatible with the container runtime and scripts in
......
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