From mboxrd@z Thu Jan  1 00:00:00 1970
From: Namjae Jeon <namjae.jeon@samsung.com>
Subject: RE: [PATCH v8 1/4] fat: add fat_fallocate operation
Date: Wed, 10 Dec 2014 21:10:08 +0900
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Cc: 'Luk?? Czerner' <lczerner@redhat.com>,
	'OGAWA Hirofumi' <hirofumi@mail.parknet.co.jp>,
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To: 'Christoph Hellwig' <hch@infradead.org>
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> 
> On Wed, Dec 10, 2014 at 07:42:16PM +0900, Namjae Jeon wrote:
> > User have to call fallocate again if opening file after close().
> > And fallocate() will skip allocation if fallocated blocks is avaiable.
> > Instead, It gurrantee to be available fallocated blocks between open
> > and close(). And I updated such limitation of fat fallocate in
> > Documentation.
> 
> Documentation doesn't help, this breaks application exposed semantics.
> 
> If you think there is a use case for non-persistant preallocations
> please propose a new fallocate flag for it, or given the lack of use
> case probably just add a fat specific ioctl instead.
Hi Christoph,
Yes, There are use cases from me and samba team also.
And it is fat's specific limitation. so looks better to add ioctl.

Thanks.