From: Arnd Bergmann <arnd@arndb.de>
To: Lee Jones <lee.jones@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linus.walleij@stericsson.com,
srinidhi.kasagar@stericsson.com
Subject: Re: [PATCH 2/2] ARM: ux500: Enable HIGHMEM in the u8540 defconfig
Date: Fri, 31 May 2013 17:02:53 +0200 [thread overview]
Message-ID: <38058740.G1EqTG95pA@wuerfel> (raw)
In-Reply-To: <1370010272-25520-2-git-send-email-lee.jones@linaro.org>
On Friday 31 May 2013 15:24:32 Lee Jones wrote:
> In order to utilise all of the memory located on ux500 based devices
> we have to enable HIGHMEM. Without it the kernel truncates memory down
> to what's left after the PAGE_OFFSET has been applied, which doesn't
> leave an awful lot, especially if we're running large rootfs' such
> as full Linux desktop distributions or Android.
>
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
How much memory do those devices have? Enabling HIGHMEM is quite expensive.
> diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
> index 5439925..808be06 100644
> --- a/drivers/of/fdt.c
> +++ b/drivers/of/fdt.c
You should probably resend the patch without the second half that got
in it by accident.
ARnd
next prev parent reply other threads:[~2013-05-31 15:03 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-31 14:24 [PATCH 1/2] ARM: ux500: Allocate correct amount of memory for the u8540 in DT Lee Jones
2013-05-31 14:24 ` [PATCH 2/2] ARM: ux500: Enable HIGHMEM in the u8540 defconfig Lee Jones
2013-05-31 14:58 ` Lee Jones
2013-05-31 15:02 ` Arnd Bergmann [this message]
2013-05-31 15:18 ` Lee Jones
2013-05-31 15:36 ` Arnd Bergmann
2013-06-03 8:21 ` Lee Jones
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