Re: can we move USB_DEVICEFS to non-embedded?
From: Jeff Chua
Date: Thu Jul 09 2009 - 08:12:41 EST
On Thu, Jul 9, 2009 at 11:01 AM, Randy Dunlap<randy.dunlap@xxxxxxxxxx> wrote:
> arch/x86/Kconfig says:
>
> choice
> depends on EXPERIMENTAL
> prompt "Memory split" if EMBEDDED
> default VMSPLIT_3G
> depends on X86_32
> ---help---
> Select the desired split between kernel and user memory.
>
> If the address range available to the kernel is less than the
> physical memory installed, the remaining memory will be available
> as "high memory". Accessing high memory is a little more costly
> than low memory, as it needs to be mapped into the kernel first.
> Note that increasing the kernel address space limits the range
> available to user programs, making the address space there
> tighter. Selecting anything other than the default 3G/1G split
> will also likely make your kernel incompatible with binary-only
> kernel modules.
Got it. Thanks for the pointer.
Jeff.
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