From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Subject: Re: ftruncate-mmap: pages are lost after writing to mmaped file.
Date: Wed, 25 Mar 2009 05:14:34 +0900
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Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Nick Piggin <nickpiggin@yahoo.com.au>,
        "Martin J. Bligh" <mbligh@mbligh.org>, linux-ext4@vger.kernel.org,
        Ying Han <yinghan@google.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        linux-mm <linux-mm@kvack.org>, guichaz@gmail.com,
        Alex Khesin <alexk@google.com>, Mike Waychison <mikew@google.com>,
        Rohit Seth <rohitseth@google.com>
To: Jan Kara <jack@suse.cz>
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In-Reply-To: <20090324152959.GG23439@duck.suse.cz> (Jan Kara's message of
	"Tue, 24 Mar 2009 16:29:59 +0100")
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Jan Kara <jack@suse.cz> writes:

>   BTW: Note that there's a plenty of filesystems that don't implement
> mkwrite() (e.g. ext2, UDF, VFAT...) and thus have the same problem with
> ENOSPC. So I'd not speak too much about consistency ;).

FWIW, fatfs doesn't allow sparse file (mmap the non-allocated region),
so I guess there is no problem.
-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>

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