Re: PCI resources above 4GB

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On 13/04/12 13:49, Steven Newbury wrote:
> On 13/04/12 12:58, Steven Newbury wrote:
> 
>>> It's not stable, crashes soon after GMA comes up. (Could be 
>>> unrelated breakage in linus/master? Probably not but I will 
>>> verify.)  I noticed the high allocations are occuring from the 
>>> top of 64-bit address-space, whilst /proc/cpuinfo shows only
>>> 48 bits of virtual addressing.  Could that be why..?
>> To reply to myself again, I should have said crashes shortly
>> after Xorg initialises using the intel driver, in both cases!
>> I'm building a kernel now without the patch set to see if it's 
>> unrelated.  If it still dies I'll try applying your patch set to
>> a branch without the changes from linus/master... (should have
>> done that anyway...)
> 
> Okay, I instead created a branch from an older 3.4-rc1+ kernel
> tree, running it now, and it seems to be stable.  Something perhaps
> in the newer tree not playing nicely.  I'll see if I can bisect it,
> or at least base of rc2 if that works... (I'm a little wary of
> crashing the system too much and losing my btrfs filesystem...)
rc2 is fine as well.  Not sure what happened there, I need to be more
careful about keeping a clean tree to work from.

Any idea about how to force the GMA >4G when the BIOS hasn't put it
into the middle of SystemRAM? (as it does when docked)
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