[PATCH] arm: Don't use memblock limit for the lowmem bound

Russell King - ARM Linux linux at arm.linux.org.uk
Thu May 14 03:14:47 PDT 2015

On Mon, May 11, 2015 at 07:53:41PM -0700, Laura Abbott wrote:
> From: Laura Abbott <labbott at redhat.com>
> The memblock limit is currently used in find_limits
> to find the bounds for ZONE_NORMAL. The memblock
> limit may need to be rounded down a PMD size to ensure
> allocations are fully mapped though. This has the side
> effect of reducing the amount of memory in ZONE_NORMAL.
> Since we generally want to optimize for more lowmem, fix
> this by using arm_lowmem_limit to calculate the bounds.
> This what is used for actually mapping lowmem anyway.
> Before:
> # cat /proc/zoneinfo | grep managed
>         managed  62920
> After:
> # cat /proc/zoneinfo | grep managed
>         managed  63336
> Signed-off-by: Laura Abbott <labbott at redhat.com>

Ok.  -> patch system please.

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according to speedtest.net.

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