From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3vtrbk2mKCzDqKT for ; Thu, 30 Mar 2017 15:04:02 +1100 (AEDT) Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v2U43jnJ021501 for ; Thu, 30 Mar 2017 00:03:56 -0400 Received: from e15.ny.us.ibm.com (e15.ny.us.ibm.com [129.33.205.205]) by mx0b-001b2d01.pphosted.com with ESMTP id 29gdaejbus-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Thu, 30 Mar 2017 00:03:56 -0400 Received: from localhost by e15.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 30 Mar 2017 00:03:56 -0400 Date: Wed, 29 Mar 2017 21:03:49 -0700 From: Sukadev Bhattiprolu To: Michael Ellerman Cc: praveen.pandey@in.ibm.com, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: [PATCH] powerpc/prom: Increase RMA size to 512MB MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Message-Id: <20170330040349.GA31756@us.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , >>From 3ae8d1ed31b01b92b172fe20e4560cfbfab135ec Mon Sep 17 00:00:00 2001 From: root Date: Mon, 27 Mar 2017 19:43:14 -0400 Subject: [PATCH] powerpc/prom: Increase RMA size to 512MB When booting very large systems with a large initrd, we run out of space for either the RTAS or the flattened device tree (FDT). Boot fails with messages like: Could not allocate memory for RTAS or No memory for flatten_device_tree (no room) Increasing the minimum RMA size to 512MB fixes the problem. This should not have an impact on smaller LPARs (with 256MB memory), as the firmware will cap the RMA to the memory assigned to the LPAR. Fix is based on input/discussions with Michael Ellerman. Thanks to Praveen K. Pandey for testing on a large system. Reported-by: Praveen K. Pandey Signed-off-by: Sukadev Bhattiprolu --- arch/powerpc/kernel/prom_init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index 1c1b44e..dd8a04f 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -815,7 +815,7 @@ struct ibm_arch_vec __cacheline_aligned ibm_architecture_vec = { .virt_base = cpu_to_be32(0xffffffff), .virt_size = cpu_to_be32(0xffffffff), .load_base = cpu_to_be32(0xffffffff), - .min_rma = cpu_to_be32(256), /* 256MB min RMA */ + .min_rma = cpu_to_be32(512), /* 512MB min RMA */ .min_load = cpu_to_be32(0xffffffff), /* full client load */ .min_rma_percent = 0, /* min RMA percentage of total RAM */ .max_pft_size = 48, /* max log_2(hash table size) */ -- 1.8.3.1