From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laura Abbott Subject: Re: [PATCHv5 2/2] arm: Get rid of meminfo Date: Mon, 23 Jun 2014 13:47:55 -0700 Message-ID: <53A8927B.3020409@codeaurora.org> References: <1396544698-15596-1-git-send-email-lauraa@codeaurora.org> <1396544698-15596-3-git-send-email-lauraa@codeaurora.org> <20140623091754.GD14781@pengutronix.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20140623091754.GD14781@pengutronix.de> Sender: owner-linux-mm@kvack.org To: =?ISO-8859-1?Q?Uwe_Kleine-K=F6nig?= Cc: Nicolas Pitre , Andrew Lunn , Catalin Marinas , Will Deacon , Grant Likely , linux-mm@kvack.org, Daniel Walker , Marek Szyprowski , Kukjin Kim , Russell King , David Brown , Sebastian Hesselbarth , Grygorii Strashko , Jason Cooper , linux-arm-msm@vger.kernel.org, Haojian Zhuang , Leif Lindholm , Ben Dooks , linux-arm-kernel@lists.infradead.org, Courtney Cavin , Eric Miao , Ard Biesheuvel , linux-k List-Id: linux-arm-msm@vger.kernel.org Thanks for the report. On 6/23/2014 2:17 AM, Uwe Kleine-K=F6nig wrote: > This patch is in 3.16-rc1 as 1c2f87c22566cd057bc8cde10c37ae9da1a1bb76 > now. >=20 > Unfortunately it makes my efm32 machine unbootable. >=20 > With earlyprintk enabled I get the following output: >=20 > [ 0.000000] Booting Linux on physical CPU 0x0 > [ 0.000000] Linux version 3.15.0-rc1-00028-g1c2f87c22566-dirty (ukle= inek@perseus) (gcc version 4.7.2 (OSELAS.Toolchain-2012.12.1) ) #280 PREE= MPT Mon Jun 23 11:05:34 CEST 2014 > [ 0.000000] CPU: ARMv7-M [412fc231] revision 1 (ARMv7M), cr=3D000000= 00 > [ 0.000000] CPU: unknown data cache, unknown instruction cache > [ 0.000000] Machine model: Energy Micro Giant Gecko Development Kit > [ 0.000000] debug: ignoring loglevel setting. > [ 0.000000] bootconsole [earlycon0] enabled > [ 0.000000] On node 0 totalpages: 1024 > [ 0.000000] free_area_init_node: node 0, pgdat 880208f4, node_mem_ma= p 00000000 > [ 0.000000] Normal zone: 3840 pages exceeds freesize 1024 This looks off. The number of pages for the memmap exceeds the available = free size. Working backwards, I think the wrong bounds are being calculated in find_limits in arch/arm/mm/init.c . max_low is now calculated via the cur= rent limit but nommu never sets a limit unlike the mmu case. Can you try the following patch and see if it fixes the issue? If this doesn't work, can you share working bootup logs so I can do a bit more compare and contrast= ? Thanks, Laura ---8<---- >>From 9b19241d577caf91928e26e55413047d1be90feb Mon Sep 17 00:00:00 2001 From: Laura Abbott Date: Mon, 23 Jun 2014 13:26:56 -0700 Subject: [PATCH] arm: Set memblock limit for nommu Commit 1c2f87c (ARM: 8025/1: Get rid of meminfo) changed find_limits to use memblock_get_current_limit for calculating the max_low pfn. nommu targets never actually set a limit on memblock though which means memblock_get_current_limit will just return the default value. Set the memblock_limit to be the end of DDR to make sure bounds are calculated correctly. Signed-off-by: Laura Abbott --- arch/arm/mm/nommu.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c index da1874f..a014dfa 100644 --- a/arch/arm/mm/nommu.c +++ b/arch/arm/mm/nommu.c @@ -300,6 +300,7 @@ void __init sanity_check_meminfo(void) sanity_check_meminfo_mpu(); end =3D memblock_end_of_DRAM(); high_memory =3D __va(end - 1) + 1; + memblock_set_current_limit(end); } =20 /* --=20 The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum= , hosted by The Linux Foundation -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org