Nate Lawson wrote:
avatar Lin wrote:
Our customers are concerned about the following messages in `dmesg` output.
===
acpi0: reservation of 0, a0000 (3) failed
acpi0: reservation of 100000, bff00000 (3) failed
===
Please help to clarify this issue.
Or , in other direction, where to find official document to convince
our customers that these messages are ignorable ?
It is related to the sysresource acpi memory objects. It means that
something was using the system resource before acpi allocated it. For
#1, that looks like lowmem up to the VGA range. For #2, it looks like
option ROMs.
The BIOS has configured the devices beforehand so as long as everything
works, the msgs can be ignored.
Actually, to handle non-ACPI systems and ACPI systems that do not list
system memory in the system resource objects, I added a 'ram0' device
which uses the SMAP table and allocates address space for all of memory
to perform a similar function to ACPI system resource objects. Often
this message triggers now because the ram0 device has claimed the
resources before ACPI gets a chance. You can certainly ignore these
messages. If you look in 'devinfo -ur' you will probably find that
these resource ranges are allocated by the ram0 device.
--
John Baldwin
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