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Date: Sun, 2 Nov 2014 16:10:13 +0800 From: Daniel J Blueman <daniel@...ascale.com> To: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, Bjorn Helgaas <bhelgaas@...gle.com> Cc: Daniel J Blueman <daniel@...ascale.com>, x86@...nel.org, linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org, Steffen Persvold <sp@...ascale.com> Subject: [PATCH v3 5/5] Use 2GB memory block size on large x86-64 systems On larger x64-64 systems, use a 2GB memory block size to reduce sysfs entry creation time by 16x. Large is defined as 64GB or more memory. Signed-off-by: Daniel J Blueman <daniel@...ascale.com> --- arch/x86/mm/init_64.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 4cb8763..6002e80 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -52,7 +52,6 @@ #include <asm/numa.h> #include <asm/cacheflush.h> #include <asm/init.h> -#include <asm/uv/uv.h> #include <asm/setup.h> #include "mm_internal.h" @@ -1247,9 +1246,9 @@ static unsigned long probe_memory_block_size(void) /* start from 2g */ unsigned long bz = 1UL<<31; -#ifdef CONFIG_X86_UV - if (is_uv_system()) { - printk(KERN_INFO "UV: memory block size 2GB\n"); +#ifdef CONFIG_X86_64 + if (totalram_pages >= (64ULL << (30 - PAGE_SHIFT))) { + pr_info("Using 2GB memory block size for large-memory system\n"); return 2UL * 1024 * 1024 * 1024; } #endif -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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