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aa7c028adb
We know that calling devmatch will be futile if there's no plug and play information for it to match on. Avoid this generically when we see "? at +on" which happens only when the location and pnpinfo aren't provided. Don't call "service devmatch quietstart" here. We also ignore ACPI devices with a _HID of none. These also will never load a new driver, so avoid calling "service devmatch quietstart" here too. Use the more compatct "$*" instead of "'?'$_" when calling "service devmatch quietstart" since it will evaluate to the same thing. On my laptop, this eliminates 45% of the calls to devmatch. While it would be even better to integrate devmatch into devd (so we only parse linker.hints once), that will have to wait for another day as it's a bit more complex to arrange that avoiding easy to avoid calls. Sponsored by: Netflix Reviewed by: emaste Differential Revision: https://reviews.freebsd.org/D42326
38 lines
1.1 KiB
Plaintext
38 lines
1.1 KiB
Plaintext
# Implement the run-time component of devmatch by reacting to nomatch events.
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#
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# Ignore those devices that can't possibly match. When there's neither a
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# location, nor a pnpinfo string, we know that there's nothing devmatch can
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# match on. When it's only a location, it'd debateable, but for nomatch
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# events, we can't disambiguate between the two reliably.
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#
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nomatch 101 {
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match "_" " +at +on .*";
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};
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#
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# Ignore ACPI devices whose _HID is none. These cannot tell us what to load,
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# since 'none' is not a valid id. There's no need to call devvmatch for these either.
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#
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nomatch 101 {
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match "_HID" "none";
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match "bus" "acpi[0-9]+";
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};
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#
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# Generic NOMATCH event
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#
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# Note: It would be better to have some internal-to-devd action that will do
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# what devmatch does without re-parsing loader.hints for each invocation
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#
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nomatch 100 {
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action "service devmatch quietstart $*";
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};
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# Add the following to devd.conf to prevent this from running:
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# nomatch 1000 {
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# action "true";
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# };
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# it replaces the generic event with one of higher priority that
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# does nothing. You can also set 'devmatch_enable=NO' in /etc/rc.conf
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