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authorJeremy Fitzhardinge <jeremy@goop.org>2007-05-02 19:27:12 +0200
committerAndi Kleen <andi@basil.nowhere.org>2007-05-02 19:27:12 +0200
commitb6e3590f8145c77b8fcef3247e2412335221412f (patch)
tree47fb1a28e41fd9f4e1aef45b5482b69b8d7c154e /init
parentde90c5ce832b1218042316260ff9268b00fdcba3 (diff)
downloadlinux-b6e3590f8145c77b8fcef3247e2412335221412f.tar.gz
[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 <rusty@rustcorp.com.au> Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'init')
-rw-r--r--init/main.c8
1 files changed, 2 insertions, 6 deletions
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;