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Date:	Sun, 17 Jan 2010 06:08:47 -0500
From:	Christoph Hellwig <>
To:	Andrea Arcangeli <>
Cc:	Andrew Morton <>,,,
Subject: Re: [PATCH] register MADV_HUGEPAGE

On Sat, Jan 16, 2010 at 07:46:42PM +0100, Andrea Arcangeli wrote:
> From: Andrea Arcangeli <>
> In order to allow early shipping transparent hugepage feature enabled
> only inside MADV_HUGEPAGE and not globally to diminish the risk of
> unexpected performance regressions on non-hypervisor related usages
> I'd need this little define registered. This is also to avoid things
> like this:

NACK, usespace ABIs only go in when features are added.  There's a more
than large enough chance that it will change for one reason or another.

And while transparent hugepages are a good feature to add, it's still in
a far to early stage to go on with it.

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