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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2007-05-02 19:27:12 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 19:27:12 +0200 |
| commit | b6e3590f8145c77b8fcef3247e2412335221412f (patch) | |
| tree | 47fb1a28e41fd9f4e1aef45b5482b69b8d7c154e /init | |
| parent | de90c5ce832b1218042316260ff9268b00fdcba3 (diff) | |
| download | op-kernel-dev-b6e3590f8145c77b8fcef3247e2412335221412f.zip op-kernel-dev-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.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/init/main.c b/init/main.c index a92989e..80f09f3 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; |
