From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from numascale.com ([213.162.240.84]:33564 "EHLO numascale.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751212AbaKFEwY (ORCPT ); Wed, 5 Nov 2014 23:52:24 -0500 From: Daniel J Blueman To: Thomas Gleixner , Ingo Molnar , Yinghai Lu Cc: Daniel J Blueman , x86@kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Steffen Persvold , "H. Peter Anvin" , Bjorn Helgaas Subject: [PATCH] x86: Drop redundant memory-block sizing code Date: Thu, 6 Nov 2014 12:50:14 +0800 Message-Id: <1415249414-20888-1-git-send-email-daniel@numascale.com> In-Reply-To: References: Sender: linux-pci-owner@vger.kernel.org List-ID: Drop the unused code from selecting a fixed memory block size of 2GB on large-memory x86-64 systems. Signed-off-by: Daniel J Blueman --- arch/x86/mm/init_64.c | 18 +----------------- 1 file changed, 1 insertion(+), 17 deletions(-) diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index ebca30f..09c0567 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -1243,28 +1243,12 @@ int in_gate_area_no_mm(unsigned long addr) static unsigned long probe_memory_block_size(void) { - /* start from 2g */ - unsigned long bz = 1UL<<31; - if (totalram_pages >= (64ULL << (30 - PAGE_SHIFT))) { pr_info("Using 2GB memory block size for large-memory system\n"); return 2UL * 1024 * 1024 * 1024; } - /* less than 64g installed */ - if ((max_pfn << PAGE_SHIFT) < (16UL << 32)) - return MIN_MEMORY_BLOCK_SIZE; - - /* get the tail size */ - while (bz > MIN_MEMORY_BLOCK_SIZE) { - if (!((max_pfn << PAGE_SHIFT) & (bz - 1))) - break; - bz >>= 1; - } - - printk(KERN_DEBUG "memory block size : %ldMB\n", bz >> 20); - - return bz; + return MIN_MEMORY_BLOCK_SIZE; } static unsigned long memory_block_size_probed; -- 1.9.1