linux-kernel - Re: [PATCH] fs: add fincore(2) (mincore(2) for file descriptors)

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Message-Id: <20100128002313.2b94344e.akpm@linux-foundation.org>
Date:	Thu, 28 Jan 2010 00:23:13 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Steve VanDeBogart <vandebo-lkml@...dBox.Net>
Cc:	Chris Frost <frost@...ucla.edu>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Benny Halevy <bhalevy@...asas.com>,
	linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fs: add fincore(2) (mincore(2) for file descriptors)

On Wed, 27 Jan 2010 23:42:35 -0800 (PST) Steve VanDeBogart <vandebo-lkml@...dBox.Net> wrote:

> > Is it likely that these changes to SQLite and Gimp would be merged into
> > the upstream applications?
> 
> Changes to the GIMP fit nicely into the code structure, so it's feasible
> to push this kind of optimization upstream.  The changes in SQLite are
> a bit more focused on the benchmark, but a more general approach is not
> conceptually difficult.  SQLite may not want the added complexity, but
> other database may be interested in the performance improvement.
> 
> Of course, these kernel changes are needed before any application can
> optimize its IO as we did with libprefetch.

That didn't really answer my question.

If there's someone signed up and motivated to do the hard work of
getting these changes integrated into the upstream applications then
that makes us more interested.  If, however it was some weekend
proof-of-concept hack which shortly dies an instadeath then...  meh,
not so much.


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