Messages in this thread | | | Date | Thu, 9 Jul 2009 20:12:23 +0800 | Subject | Re: can we move USB_DEVICEFS to non-embedded? | From | Jeff Chua <> |
| |
On Thu, Jul 9, 2009 at 11:01 AM, Randy Dunlap<randy.dunlap@oracle.com> 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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |