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Date: Mon, 05 Mar 2007 16:00:06 -0600
From: Eric Sandeen <sandeen@redhat.com>
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CC: Arnd Bergmann <arnd@arndb.de>, Ulrich Drepper <drepper@redhat.com>,
       Anton Altaparmakov <aia21@cam.ac.uk>,
       Christoph Hellwig <hch@infradead.org>,
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Subject: Re: [RFC] Heads up on sys_fallocate()
References: <20070117094658.GA17390@amitarora.in.ibm.com> <45EB4A55.3060908@redhat.com> <20070305001621.GB18691@lazybastard.org> <200703050136.37181.arnd@arndb.de> <20070305114109.GA454@lazybastard.org>
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Jörn Engel wrote:
> Does the allocation have to be persistent beyond lifetime of the file
> descriptor?  It would be fairly simple to support the write guarantee
> while the file is open (or rather the inode remains cached) and drop it
> afterwards.

"The posix_fallocate() function shall ensure that any required storage
for regular file data starting at offset and continuing for len bytes is
allocated on the file system storage media."

I interpret "on the storage media" to mean that it is persistent.

-Eric