linux-kernel - Re: [V2 PATCH] tmpfs: add fallocate support

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Message-ID: <20111119100326.GA27967@infradead.org>
Date:	Sat, 19 Nov 2011 05:03:26 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	Cong Wang <amwang@...hat.com>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	Pekka Enberg <penberg@...nel.org>,
	Hugh Dickins <hughd@...gle.com>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Lennart Poettering <lennart@...ttering.net>,
	Kay Sievers <kay.sievers@...y.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-mm@...ck.org
Subject: Re: [V2 PATCH] tmpfs: add fallocate support

On Fri, Nov 18, 2011 at 06:39:50PM +0800, Cong Wang wrote:
> It seems that systemd needs tmpfs to support fallocate,
> see http://lkml.org/lkml/2011/10/20/275. This patch adds
> fallocate support to tmpfs.

What for exactly?  Please explain why preallocating on tmpfs would
make any sense.
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