Re: aac & PAE not happy in -current


On Mar 21, 2007, at 12:36 AM, Scott Long wrote:
Booting the same kernel without PAE I get the same thing:
aacch0: <AAC RAID Channel> port 0xcc00-0xccff mem 0xfccff000-0xfccfffff irq 30 at device 6.0 on pci5
aacch1: <AAC RAID Channel> port 0xc800-0xc8ff mem 0xfccfe000-0xfccfefff irq 31 at device 6.1 on pci5
aac0: <Dell PERC 3/Di> mem 0xf0000000-0xf7ffffff irq 30 at device 8.1 on pci4
aac0: [FAST]
aac0: Adaptec Raid Controller 2.0.0-1
and it works fine.
Is this a known problem, or is there any other info I can give? Happy to try anything anyone might suggest. :)

The device is asking for 128MB of register space. This is exhausting
the limit on the amount of kernel mapped memory, hence the panic. The
difference between PAE and non-PAE is likely that the non-PAE case
isn't consuming as much kernel address space for the extra page tables,
so you're squeaking by.

The 128MB of register space is wrong, but it's something that the aac
firmware is causing. I don't have a 2650, but my 2450 only tries to
claim 4K for registers for the aac device, and the hardware is basically
identical to the 2650. Maybe try flashing in a newer (or older)
firmware? Knowing what firmware version you have would help.

Okay, after spending the better part of the weekend trying to figure out how to PXE boot the floppies that Dell gives you (using their own version of DOS), I've upgraded to the very latest system BIOS, controller firmware and kernel, and it's still requesting 128MB of memory. Nothing seems to have changed really.

Any other suggestions? Booting into Linux seems to show that it's also eating 128MB of memory space there, so it's nothing FreeBSD is doing to cause this.

Does your controller have the 128MB dimm for caching? I still can't see why they'd expose that to the host, but it's my only theory at the moment.

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