linux-kernel - [patch v2 0/4] percpu_counter: cleanup and fix

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Message-Id: <20110413075715.090406229@sli10-conroe.sh.intel.com>
Date:	Wed, 13 Apr 2011 15:57:15 +0800
From:	shaohua.li@...el.com
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, cl@...ux.com, tj@...nel.org,
	eric.dumazet@...il.com
Subject: [patch v2 0/4] percpu_counter: cleanup and fix

Cleanup percpu_counter code and fix some bugs. The main purpose is to convert
percpu_counter to use atomic64, which is useful for workloads which cause
percpu_counter->lock contented. In a workload I tested, the atomic method is
50x faster (please see patch 4 for detail).

patch 1&2: clean up
patch 3: fix bug of percpu_counter for 32-bit systems.
patch 4: convert percpu_counter to use atomic64
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