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c58d78f4fa
Introduce hw.bus.devctl_nomatch_enabled and use it to suppress NOMATCH until devmatch runs There's a lot of NOMATCH events generated at boot. We also run devmatch once during early boot to load unmatched devices. To avoid redundant work, don't start generating NOMATCH events until after devmatch runs. Set hw.bus.devctl_nomatch_enabled=1 just before we run devmatch. The kernel will suppress NOMATCH events until this is set to true. This saves about 170ms from the boot on aarch64 running atop Apple M-series processors and the VMWare Fusion hypervisor. Reviewed by: imp, cperciva MFC after: 3 days Sponsored by: Google Summer of Code Pull Request: https://github.com/freebsd/freebsd-src/pull/1213 (cherry picked from commit 6437872c1d665c2605f54e8ff040b0ba41edad07)
81 lines
2.7 KiB
Bash
Executable file
81 lines
2.7 KiB
Bash
Executable file
#!/bin/sh
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# Copyright (c) 2018 M. Warner Losh <imp@FreeBSD.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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#
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# PROVIDE: devmatch
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# REQUIRE: kld
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# BEFORE: netif
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# KEYWORD: nojail
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. /etc/rc.subr
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name="devmatch"
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desc="Use devmatch(8) to load kernel modules"
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rcvar="${name}_enable"
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start_cmd="${name}_start"
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stop_cmd=':'
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one_nomatch="$2"
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devmatch_start()
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{
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local x m list
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if [ -n "$one_nomatch" ]; then
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list=$(devmatch -p "${one_nomatch}" | sort -u)
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else
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sysctl hw.bus.devctl_nomatch_enabled=1
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list=$(devmatch | sort -u)
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fi
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[ -n "$list" ] || return
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# While kldload can accept multiple modules on the line at once, we loop
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# here in case there's some weird error with one of them. We also
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# optimize against the false positives or drivers that have symbolic
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# links that confuse devmatch by running it -n. Finally, we filter out
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# all items in the devmatch_blocklist.
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#
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# We strip all the .ko suffixes off so that one may specify modules
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# with or without .ko. Prior version documented it was without, while
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# the code required it, so accept both now. devmatch produces module
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# names with .ko
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devctl freeze
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x=$(echo "#${devmatch_blocklist:-${devmatch_blacklist}}#$(kenv -q devmatch_blocklist)#" | \
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sed -e "s/ /#/g;s/\.ko#/#/g")
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for m in ${list}; do
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m="${m%.ko}"
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case "${x}" in
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*"#${m}#"*) continue ;;
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esac
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kldstat -q -n ${m} || \
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(echo "Autoloading module: ${m}"; kldload -n ${m})
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done
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devctl thaw
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}
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load_rc_config $name
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run_rc_command "$1"
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