Re: [PATCH] eventpoll : Suppress a short lived lock from structfile

[Peter Zijlstra]

On Mon, 2005-07-11 at 09:18 +0200, Eric Dumazet wrote:
> Hi Davide
> 
> I found in my tests that there is no need to have a f_ep_lock spinlock
> attached to each struct file, using 8 bytes on 64bits platforms. The
> lock is hold for a very short time period and can be global, with almost
> no change in performance for applications using epoll, and a gain for
> all others.
> 

Have you tested the impact of this change on big SMP/NUMA machines?
I hate to see an Altrix crashing to its knees :-)

-- 
Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>

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