From b6e3590f8145c77b8fcef3247e2412335221412f Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge Date: Wed, 2 May 2007 19:27:12 +0200 Subject: [PATCH] x86: Allow percpu variables to be page-aligned Let's allow page-alignment in general for per-cpu data (wanted by Xen, and Ingo suggested KVM as well). Because larger alignments can use more room, we increase the max per-cpu memory to 64k rather than 32k: it's getting a little tight. Signed-off-by: Rusty Russell Signed-off-by: Jeremy Fitzhardinge Signed-off-by: Andi Kleen Acked-by: Ingo Molnar Cc: Andi Kleen Signed-off-by: Andrew Morton --- init/main.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) (limited to 'init') diff --git a/init/main.c b/init/main.c index a92989e7836..80f09f31bfa 100644 --- a/init/main.c +++ b/init/main.c @@ -369,12 +369,8 @@ static void __init setup_per_cpu_areas(void) unsigned long nr_possible_cpus = num_possible_cpus(); /* Copy section for each CPU (we discard the original) */ - size = ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES); -#ifdef CONFIG_MODULES - if (size < PERCPU_ENOUGH_ROOM) - size = PERCPU_ENOUGH_ROOM; -#endif - ptr = alloc_bootmem(size * nr_possible_cpus); + size = ALIGN(PERCPU_ENOUGH_ROOM, PAGE_SIZE); + ptr = alloc_bootmem_pages(size * nr_possible_cpus); for_each_possible_cpu(i) { __per_cpu_offset[i] = ptr - __per_cpu_start; -- cgit v1.2.3