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Date:   Sat, 16 May 2020 11:36:24 +0530
From:   afzal mohammed <afzal.mohd.ma@gmail.com>
To:     Arnd Bergmann <arnd@arndb.de>
Cc:     Russell King <linux@armlinux.org.uk>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: ARM: static kernel in vmalloc space
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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