From bdee237c0343a5d1a6cf72c7ea68e88338b26e08 Mon Sep 17 00:00:00 2001 From: Daniel J Blueman Date: Tue, 4 Nov 2014 16:29:44 +0800 Subject: [PATCH] x86: mm: Use 2GB memory block size on large-memory x86-64 systems On large-memory x86-64 systems of 64GB or more with memory hot-plug enabled, use a 2GB memory block size. Eg with 64GB memory, this reduces the number of directories in /sys/devices/system/memory from 512 to 32, making it more manageable, and reducing the creation time accordingly. This caveat is that the memory can't be offlined (for hotplug or otherwise) with the finer default 128MB granularity, but this is unimportant due to the high memory densities generally used with such large-memory systems, where eg a single DIMM is the order of 16GB. Signed-off-by: Daniel J Blueman Cc: Steffen Persvold Cc: Bjorn Helgaas Link: http://lkml.kernel.org/r/1415089784-28779-4-git-send-email-daniel@numascale.com Signed-off-by: Thomas Gleixner --- Reading git-format-patch failed