From: Eric Sandeen <sandeen@sandeen.net>
To: Bhagi rathi <jahnu77@gmail.com>
Cc: David Chinner <dgc@sgi.com>, xfs@oss.sgi.com
Subject: Re: TAKE 972756 - Implement fallocate.
Date: Tue, 06 Nov 2007 13:04:05 -0600 [thread overview]
Message-ID: <4730BAA5.1080406@sandeen.net> (raw)
In-Reply-To: <cc7060690711060927n1ea8a489n9f02029a11b73b00@mail.gmail.com>
Bhagi rathi wrote:
> File is of size 1k. A 4k block is allocated as file-system block size is
> 4k.
> Preallocation happened from 1k to 256k. Now, it looks to me that we have
> un-written extents from 4k to 256k. There is no guarantee that data from 1k
> to 4k is all zero'es. Fallocate is updating size. Hence on subsequent read,
> we can get garbage from 1k to 4k and all zero'es from 4k to 256k
You've tested this and found it to be true?
-Eric
> Is the expectation here is application should take the responsibility of
> zero'ing
> data? I still need to through fallocate requirements.
next prev parent reply other threads:[~2007-11-06 19:04 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-02 2:43 TAKE 972756 - Implement fallocate David Chinner
2007-11-05 18:42 ` Bhagi rathi
2007-11-06 0:12 ` David Chinner
2007-11-06 17:27 ` Bhagi rathi
2007-11-06 19:04 ` Eric Sandeen [this message]
2007-11-06 20:41 ` David Chinner
2007-11-06 22:38 ` Nathan Scott
2007-11-07 5:42 ` Bhagi rathi
2007-11-07 9:35 ` nscott
2007-12-10 17:50 ` Eric Sandeen
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