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

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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Date: Sat, 19 Nov 2011 05:03:26 -0500
From: Christoph Hellwig <hch@infradead.org>
To: Cong Wang <amwang@redhat.com>
Cc: linux-kernel@vger.kernel.org, akpm@linux-foundation.org,
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Subject: Re: [V2 PATCH] tmpfs: add fallocate support
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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.