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Date: Wed, 15 Dec 2010 17:32:41 +0100 From: Tejun Heo <tj@...nel.org> To: Christoph Lameter <cl@...ux.com> CC: akpm@...ux-foundation.org, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Pekka Enberg <penberg@...helsinki.fi>, linux-kernel@...r.kernel.org, Eric Dumazet <eric.dumazet@...il.com>, "H. Peter Anvin" <hpa@...or.com>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com> Subject: Re: [cpuops cmpxchg V2 3/5] irq_work: Use per cpu atomics instead of regular atomics On 12/14/2010 05:28 PM, Christoph Lameter wrote: > The irq work queue is a per cpu object and it is sufficient for > synchronization if per cpu atomics are used. Doing so simplifies > the code and reduces the overhead of the code. > > Before: > > christoph@...ux-2.6$ size kernel/irq_work.o > text data bss dec hex filename > 451 8 1 460 1cc kernel/irq_work.o > > After: > > christoph@...ux-2.6$ size kernel/irq_work.o > text data bss dec hex filename > 438 8 1 447 1bf kernel/irq_work.o > > Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl> Peter, can you please ack this one? Thanks. -- tejun -- 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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