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

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Message-ID: <20111121101155.GC17887@infradead.org>
Date:	Mon, 21 Nov 2011 05:11:55 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	Hugh Dickins <hughd@...gle.com>
Cc:	Cong Wang <amwang@...hat.com>, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, Pekka Enberg <penberg@...nel.org>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Lennart Poettering <lennart@...ttering.net>,
	Kay Sievers <kay.sievers@...y.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Christoph Hellwig <hch@...radead.org>, linux-mm@...ck.org
Subject: Re: [V2 PATCH] tmpfs: add fallocate support

On Sun, Nov 20, 2011 at 01:22:10PM -0800, Hugh Dickins wrote:
> First question that springs to mind (to which I shall easily find
> an answer): is it actually acceptable for fallocate() to return
> -ENOSPC when it has already completed a part of the work?

No, it must undo all allocations if it returns ENOSPC.

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