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Message-ID: <1286469421.2912.240.camel@edumazet-laptop> Date: Thu, 07 Oct 2010 18:37:01 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-kernel <linux-kernel@...r.kernel.org> Subject: [PATCH] percpu_counter: change inaccurate comment percpu_counter used to be huge objects, they are not anymore, thanks to fine alloc_percpu() granularity. We now consume 4 bytes per possible cpu. Signed-off-by: Eric Dumazet <eric.dumazet@...il.com> --- include/linux/percpu_counter.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h index 8a7d510..5e2cb5c 100644 --- a/include/linux/percpu_counter.h +++ b/include/linux/percpu_counter.h @@ -3,7 +3,8 @@ /* * A simple "approximate counter" for use in ext2 and ext3 superblocks. * - * WARNING: these things are HUGE. 4 kbytes per counter on 32-way P4. + * WARNING: these things are big : 4 bytes per possible cpu per counter. + * For a 64 cpus machine: 256 bytes + sizeof(struct percpu_counter) */ #include <linux/spinlock.h> -- 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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