https://bugzilla.kernel.org/show_bug.cgi?id=208703
Bug ID: 208703
Summary: PnP ACPI init has 100 ms delay until quirk message
Product: ACPI
Version: 2.5
Kernel Version: 5.7.6
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ACPICA-Core
Assignee: acpi_acpica-c...@kernel-bugs.osdl.org
Reporter: pmenzel+bugzilla.kernel....@molgen.mpg.de
Regression: No
Created attachment 290603
--> https://bugzilla.kernel.org/attachment.cgi?id=290603&action=edit
Linux 5.7.6 messages (output of `dmesg`)
On Acer TravelMate 5735Z with Debian Sid/unstable and Linux 5.7.6, over 100 ms
are spent in PnP ACPI init.
```
[ 0.000000] microcode: microcode updated early to revision 0xa0b, date =
2010-09-28
[ 0.000000] Linux version 5.7.0-1-amd64 (debian-ker...@lists.debian.org)
(gcc version 9.3.0 (Debian 9.3.0-14), GNU ld (GNU Binutils for Debian) 2.34) #1
SMP Debian 5.7.6-1 (2020-06-24)
[…]
[ 0.383219] pnp: PnP ACPI init
[ 0.488229] pnp 00:00: disabling [io 0x164e-0x164f] because it overlaps
0000:00:1c.2 BAR 13 [io 0x1000-0x1fff]
[ 0.488299] system 00:00: [io 0x0600-0x060f] has been reserved
[ 0.488301] system 00:00: [io 0x0610] has been reserved
[ 0.488303] system 00:00: [io 0x0800-0x080f] has been reserved
[ 0.488305] system 00:00: [io 0x0810-0x0817] has been reserved
[ 0.488307] system 00:00: [io 0x0820-0x0823] has been reserved
[ 0.488308] system 00:00: [io 0x0400-0x047f] has been reserved
[ 0.488310] system 00:00: [io 0x0500-0x057f] has been reserved
[ 0.488313] system 00:00: [io 0xff2c-0xff2f] has been reserved
[ 0.488316] system 00:00: [mem 0xf8000000-0xfbffffff] has been reserved
[ 0.488318] system 00:00: [mem 0xfed1c000-0xfed1ffff] has been reserved
[ 0.488320] system 00:00: [mem 0xfed10000-0xfed13fff] has been reserved
[ 0.488322] system 00:00: [mem 0xfed18000-0xfed18fff] has been reserved
[ 0.488324] system 00:00: [mem 0xfed19000-0xfed19fff] has been reserved
[ 0.488326] system 00:00: [mem 0xfec00000-0xfec00fff] could not be reserved
[ 0.488328] system 00:00: [mem 0xfed20000-0xfed8ffff] has been reserved
[ 0.488330] system 00:00: [mem 0xfee00000-0xfee00fff] has been reserved
[ 0.488338] system 00:00: Plug and Play ACPI device, IDs PNP0c02 (active)
[ 0.488412] pnp 00:01: Plug and Play ACPI device, IDs PNP0b00 (active)
[ 0.488500] pnp 00:02: Plug and Play ACPI device, IDs PNP0303 (active)
[ 0.488598] pnp 00:03: Plug and Play ACPI device, IDs SYN1b1d SYN1b00
SYN0002 PNP0f13 (active)
[ 0.488759] pnp: PnP ACPI: found 4 devices
The warning message is shown in `quirk_system_pci_resources()`. Is there an
easy way to analyze this to get rid of the delay.
Please find all Linux messages attached.
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