linux-kernel - Re: [RFC] [PATCH] splice: add ->splice

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Message-Id: <20080818214318.7142ae3e.akpm@linux-foundation.org>
Date:	Mon, 18 Aug 2008 21:43:18 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Octavian Purdila <opurdila@...acom.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [RFC] [PATCH] splice: add ->splice_read support for /dev/zero

On Thu,  7 Aug 2008 05:00:55 +0300 Octavian Purdila <opurdila@...acom.com> wrote:

> Useful for testing.
> 
> Preallocating the zero page is simpler and faster with the relatively
> small (?) drawback of using an extra page of memory.

How much faster is it?  What workloads/benchmarks/etc?

> Maybe when CONFIG_EMBEDED is selected we can switch to dynamically
> allocating the page?
> 

One more page won't kill us.  People might want one-page-per-node, too.
But that all depends on what the benefits and applications of this are..

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