Date: Tue, 6 Jun 2017 22:52:58 +1000 (EST) From: Ian Smith <smithi@nimnet.asn.au> To: "Littlefield, Tyler" <tyler@tysdomain.com> Cc: freebsd-questions@freebsd.org Subject: Re: selectively disable acpi modules Message-ID: <20170606220917.V98304@sola.nimnet.asn.au> In-Reply-To: <mailman.79.1496750402.29319.freebsd-questions@freebsd.org> References: <mailman.79.1496750402.29319.freebsd-questions@freebsd.org>
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In freebsd-questions Digest, Vol 679, Issue 2, Message: 2
On Mon, 5 Jun 2017 16:04:37 -0400 "Littlefield, Tyler" <tyler@tysdomain.com> wrote:
> Is there a way to cut out all the acpi modules except the ones you need
> when building the kernel for FreeBSD 12?
This is rather ambiguous; in the normal meaning of 'modules' there's
only one, included in kernel by 'device acpi'. There are other modules
for various hardware, e.g. here my /boot/loader.conf loads acpi_ibm:
root@x200:~ # kldstat -v | grep acpi
470 acpi/atdma
467 acpi/attimer
465 acpi/atrtc
438 acpi/fdc
430 acpi/psmcpnp
428 acpi/atkbdc
419 acpi/fpupnp
418 root/nexus_acpi
226 acpi/ppc
25 acpi/acpi_ec
33 cpu/acpi_perf
20 nexus/acpi
32 pci/acpi_pcib
31 acpi/acpi_pcib
24 acpi/cpu
30 acpi/acpi_pci_link
29 pcib/acpi_pci
23 acpi/acpi_cmbat
28 acpi/acpi_lid
27 acpi/acpi_isab
22 acpi/acpi_button
26 acpi/hpet
38 acpi/acpi_timer
37 cpu/acpi_throttle
36 acpi/acpi_tz
21 acpi/acpi_acad
35 acpi/acpi_smbat
283 acpi/uart
34 acpi/acpi_sysresource
2 1 0xffffffff8182e000 7fa8 acpi_ibm.ko (/boot/kernel/acpi_ibm.ko)
1 acpi/acpi_ibm
acpi(4) lists all ACPI 'sub-drivers' (aka 'sub-devices') and 'features':
"The acpi driver comprises a set of drivers, which may be selectively
disabled in case of problems. To disable a sub-driver, list it in the
kernel environment variable debug.acpi.disabled. Multiple entries can
be listed, separated by a space."
https://www.freebsd.org/cgi/man.cgi?query=acpi&manpath=FreeBSD+12-current
It might be clearer if you said just what you wish to disable, and why?
cheers, Ian
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