From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: [PATCH] ARM: OMAP2PLUS: Enable HIGHMEM Date: Tue, 8 May 2012 16:59:27 -0700 Message-ID: <20120508235926.GY5088@atomide.com> References: <1335983327-14561-1-git-send-email-jon-hunter@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mho-01-ewr.mailhop.org ([204.13.248.71]:33431 "EHLO mho-01-ewr.mailhop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751241Ab2EHX73 (ORCPT ); Tue, 8 May 2012 19:59:29 -0400 Content-Disposition: inline In-Reply-To: <1335983327-14561-1-git-send-email-jon-hunter@ti.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Jon Hunter Cc: linux-omap , Santosh Shilimkar * Jon Hunter [120502 11:34]: > From: Santosh Shilimkar > > HIGMEM support in kernel is quite mature now and we have boards > like ZOOM, PANDA, SDP where 1 GB memories are installed. With > HIGHMEM disabled not all of the 1GB of RAM (only ~700MB) can be > accessed. Hence, enable HIGMEM to make use of the entire memory. > > On the boards which doesn't have more than 768 MB memory, all > the memory is directly mapped in "lowmem" and highmem isn't > exercised. Hence, there should be no impact by enabling HIGHMEM > for boards that do not need it. > > Tested on OMAP4460 Panda-ES. > > Signed-off-by: Santosh Shilimkar > Signed-off-by: Jon Hunter > Tested-by: Jon Hunter > --- > arch/arm/mach-omap2/Kconfig | 1 + > 1 files changed, 1 insertions(+), 0 deletions(-) > > diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig > index 8141b76..964ee67 100644 > --- a/arch/arm/mach-omap2/Kconfig > +++ b/arch/arm/mach-omap2/Kconfig > @@ -17,6 +17,7 @@ config ARCH_OMAP2PLUS_TYPICAL > select MENELAUS if ARCH_OMAP2 > select TWL4030_CORE if ARCH_OMAP3 || ARCH_OMAP4 > select TWL4030_POWER if ARCH_OMAP3 || ARCH_OMAP4 > + select HIGHMEM > help > Compile a kernel suitable for booting most boards Thanks applying into board branch. Regards, Tony