linux-kernel - Re: [PATCH v2] fadvise: introduce POSIX_FADV_DONTNEED

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Message-Id: <20110504144411.7f32c00c.akpm@linux-foundation.org>
Date:	Wed, 4 May 2011 14:44:11 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Andrea Righi <andrea@...terlinux.com>
Cc:	Dave Chinner <david@...morbit.com>,
	Mike Frysinger <vapier@...too.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>, linux-fsdevel@...r.kernel.org,
	linux-api@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] fadvise: introduce POSIX_FADV_DONTNEED_FS

On Wed, 27 Apr 2011 20:13:47 +0200
Andrea Righi <andrea@...terlinux.com> wrote:

> Introduce a new fadvise flag to drop page cache pages of a single
> filesystem.

I'm going to object to this on general principle.  We shouldn't toss
new features into the kernel API just because we can.  Each feature
needs a really good argument to justify its inclusion, and I don't
believe that the case has been made for this feature.

IOW, who's going to die if we don't merge it?
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