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rules: Limit the number of device units generated for serial ttys

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As per the suggestion in https://github.com/systemd/systemd/issues/33242.

This reduces the number of /dev/ttySXX device units generated in
mkosi from 32 to 4.
This commit is contained in:
Daan De Meyer 2024-06-10 12:59:58 +02:00 committed by Luca Boccassi
parent 442c6bd4ba
commit dc38f9addd
1 changed files with 2 additions and 0 deletions
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2
rules.d/99-systemd.rules.in
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@ -10,6 +10,8 @@
ACTION=="remove", GOTO="systemd_end"
SUBSYSTEM=="tty", KERNEL=="tty[a-zA-Z]*|hvc*|xvc*|hvsi*|ttysclp*|sclp_line*|3270/tty[0-9]*", TAG+="systemd"
# Exclude 8250 serial ports with a zero IO port, as they are not usable until "setserial /dev/ttySxxx port …" is invoked.
SUBSYSTEM=="tty", KERNEL=="ttyS*", DRIVERS=="serial8250", ATTR{port}=="0x0", ENV{SYSTEMD_READY}="0"
KERNEL=="vport*", TAG+="systemd"
SUBSYSTEM=="ptp", TAG+="systemd"