Hi, On Thu, May 14, 2020 at 05:32:41PM +0200, Arnd Bergmann wrote:
> Typical distros currently offer two kernels, with and without LPAE, > and they probably don't want to add a third one for LPAE with > either highmem or vmsplit-4g-4g. Having extra user address > space and more lowmem is both going to help users that > still have 8GB configurations. Okay, so the conclusion i take is, 1. VMSPLIT 4G/4G have to live alongside highmem 2. For user space copy, do pinning followed by kmap Regards afzal