cvs commit: src/sys/dev/acpica acpi.c

[Nate Lawson]

Nate Lawson wrote:
> John Baldwin wrote:
>> jhb         2007-04-25 16:22:18 UTC
>>
>>   FreeBSD src repository
>>
>>   Modified files:
>>     sys/dev/acpica       acpi.c 
>>   Log:
>>   Use a tighter check to see if a resource allocation request is for a
>>   specific request and thus should first try to be allocated from the
>>   sys_resource pool.  This avoids using the sys_resource pool for wildcard
>>   requests that have bounded ranges coming from cbb(4) and Host-PCI pcib(4)
>>   drivers.
>>   
>>   Tested by:      Andrea Bittau <a.bittau of cs.ucl.ac.uk fame>
>>   Sleuthing by:   Andrea Bittau as well
>>   
>>   Revision  Changes    Path
>>   1.235     +1 -1      src/sys/dev/acpica/acpi.c
> 
> I think I'll test this to see if it helps my via 8235 ata survive boot.

Yay, my laptop now boots with this change.  Thanks!

BTW, I've been thinking about sysres issues in general.  One is that 
sometimes ACPI tables define regions that are actually split with nexus. 
  Would it make sense to change rman to have a split model where if a 
request can be partially satisfied by this pool and a parent pool, we 
can split the request while returning a struct resource *?  struct 
resource would probably have to be changed to allow a linked list of 
internal storage with pointers to parent pools.

What do you think?

-- 
Nate