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Date: Thu, 22 Jul 2010 16:49:21 -0700
From: Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [RFC]mm: batch activate_page() to reduce lock contention
Message-Id: <20100722164921.4918399f.akpm@linux-foundation.org>
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Sender: owner-linux-mm@kvack.org
To: Shaohua Li <shaohua.li@intel.com>
Cc: linux-mm <linux-mm@kvack.org>, Andi Kleen <andi@firstfloor.org>, "Wu, Fengguang" <fengguang.wu@intel.com>
List-ID: <linux-mm.kvack.org>

On Tue, 20 Jul 2010 15:18:44 +0800
Shaohua Li <shaohua.li@intel.com> wrote:

> +void activate_page(struct page *page)
> +{
> +	struct pagevec *pvec = &get_cpu_var(activate_page_pvecs);
> +
> +	page_cache_get(page);
> +	if (!pagevec_add(pvec, page))
> +		activate_page_drain_cpu(smp_processor_id());
> +	put_cpu_var(activate_page_pvecs);
>  }

uhm, could I please draw attention to the most valuable
Documentation/SubmitChecklist?  In particular,

12: Has been tested with CONFIG_PREEMPT, CONFIG_DEBUG_PREEMPT,
    CONFIG_DEBUG_SLAB, CONFIG_DEBUG_PAGEALLOC, CONFIG_DEBUG_MUTEXES,
    CONFIG_DEBUG_SPINLOCK, CONFIG_DEBUG_SPINLOCK_SLEEP all simultaneously
    enabled.

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