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/linux/arch/x86/kernel/
H A Daperture_64.cdiff 7677b2ef6c0c4fddc84f6473f3863f40eb71821b Tue Apr 15 05:40:37 CEST 2008 Yinghai Lu <yhlu.kernel.send@gmail.com> x86_64: allocate gart aperture from 512M

because we try to reserve dma32 early, so we have chance to get aperture
from 64M.

with some sequence aperture allocated from RAM, could become E820_RESERVED.

and then if doing a kexec with a big kernel that uncompressed size is above
64M we could have a range conflict with still using gart.

So allocate gart aperture from 512M instead.

Also change the fallback_aper_order to 5, because we don't have chance to get
2G or 4G aperture.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
H A Dpci-dma.cdiff 7677b2ef6c0c4fddc84f6473f3863f40eb71821b Tue Apr 15 05:40:37 CEST 2008 Yinghai Lu <yhlu.kernel.send@gmail.com> x86_64: allocate gart aperture from 512M

because we try to reserve dma32 early, so we have chance to get aperture
from 64M.

with some sequence aperture allocated from RAM, could become E820_RESERVED.

and then if doing a kexec with a big kernel that uncompressed size is above
64M we could have a range conflict with still using gart.

So allocate gart aperture from 512M instead.

Also change the fallback_aper_order to 5, because we don't have chance to get
2G or 4G aperture.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>