From: Christoph Hellwig <hch@infradead.org>
To: Jim Meyering <jim@meyering.net>
Cc: Dave Chinner <david@fromorbit.com>,
P?draig Brady <P@draigBrady.com>,
linux-ext4@vger.kernel.org, Eric Sandeen <sandeen@sandeen.net>,
coreutils@gnu.org, Markus Trippelsdorf <markus@trippelsdorf.de>,
xfs-oss <xfs@oss.sgi.com>
Subject: Re: Files full of zeros with coreutils-8.11 and xfs (FIEMAP related?)
Date: Fri, 15 Apr 2011 13:16:29 -0400 [thread overview]
Message-ID: <20110415171629.GA9088@infradead.org> (raw)
In-Reply-To: <87sjtjq4ir.fsf@rho.meyering.net>
On Fri, Apr 15, 2011 at 10:53:48AM +0200, Jim Meyering wrote:
> Can you or anyone else point to authoritative documentation
> (or even a summary of those "discussions") of FIEMAP semantics?
A large part of the problem is that there's none and the semantics
is a hode-podge of random flags that mostly make little sense
outside of fs developers debugging the layout that we created. The
closest to a description is Documentation/filesystems/fiemap.txt
in the kernel tree, but that doesn't document most of the delicate
points.
next prev parent reply other threads:[~2011-04-15 17:16 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20110414102608.GA1678@x4.trippels.de>
[not found] ` <20110414120635.GB1678@x4.trippels.de>
[not found] ` <20110414140222.GB1679@x4.trippels.de>
[not found] ` <20110414140222.GB1679-tLCgZGx+iJ+kxVt8IV0GqQ@public.gmane.org>
2011-04-14 14:59 ` Files full of zeros with coreutils-8.11 and xfs (FIEMAP related?) Pádraig Brady
[not found] ` <4DA70BD3.1070409-V8g9lnOeT5ydJdNcDFJN0w@public.gmane.org>
2011-04-14 15:50 ` Eric Sandeen
[not found] ` <4DA717B2.3020305-+82itfer+wXR7s880joybQ@public.gmane.org>
2011-04-14 15:52 ` Pádraig Brady
2011-04-14 15:56 ` Eric Sandeen
2011-04-14 16:03 ` Markus Trippelsdorf
2011-04-14 16:14 ` Eric Sandeen
[not found] ` <20110414160343.GA12787-tLCgZGx+iJ+kxVt8IV0GqQ@public.gmane.org>
2011-04-14 16:21 ` Yongqiang Yang
[not found] ` <BANLkTimRxvBMp9M7zwiUY_UmmFOY5N58+A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-04-14 16:28 ` Markus Trippelsdorf
2011-04-14 16:31 ` Eric Sandeen
2011-04-14 16:48 ` Markus Trippelsdorf
2011-04-14 16:49 ` Eric Sandeen
2011-04-14 16:04 ` Yongqiang Yang
2011-04-14 16:10 ` Yongqiang Yang
[not found] ` <BANLkTimoLeWMJgNFGW+zdeUeJyZ-_+8fMQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-05-05 11:29 ` Pádraig Brady
2011-05-05 11:47 ` Yongqiang Yang
[not found] ` <4DA7182B.8050409-V8g9lnOeT5ydJdNcDFJN0w@public.gmane.org>
2011-04-14 17:27 ` Jim Meyering
2011-04-14 19:13 ` Pádraig Brady
[not found] ` <878vvcspz0.fsf-CybKA8TIZ99x3y/oJEDuiw@public.gmane.org>
2011-04-14 19:39 ` Jim Meyering
2011-04-14 22:59 ` Dave Chinner
2011-04-14 23:29 ` Pádraig Brady
2011-04-15 0:09 ` Dave Chinner
2011-04-15 5:01 ` Andreas Dilger
2011-04-16 0:50 ` Dave Chinner
2011-04-16 5:11 ` Andreas Dilger
2011-04-16 12:21 ` Theodore Tso
2011-04-18 0:40 ` Dave Chinner
2011-04-18 2:45 ` Andreas Dilger
2011-04-19 1:58 ` Yongqiang Yang
[not found] ` <BANLkTin=WEpSf6ddiOMNMOpCPP-wiEttSw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-04-19 2:59 ` Ted Ts'o
[not found] ` <20110419025949.GA3030-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2011-04-19 3:05 ` Eric Sandeen
[not found] ` <4DACFBEB.9040909-+82itfer+wXR7s880joybQ@public.gmane.org>
2011-04-21 20:12 ` Jim Meyering
2011-04-19 3:30 ` Yongqiang Yang
2011-04-19 4:14 ` Dave Chinner
2011-04-19 5:27 ` Christoph Hellwig
2011-04-19 3:44 ` Dave Chinner
2011-04-19 6:53 ` Yongqiang Yang
2011-04-19 7:45 ` Dave Chinner
2011-04-19 8:11 ` Yongqiang Yang
2011-04-19 14:05 ` Eric Sandeen
2011-04-19 14:09 ` Ted Ts'o
2011-04-19 14:13 ` Eric Sandeen
2011-04-19 16:01 ` Ted Ts'o
2011-04-20 1:53 ` Yongqiang Yang
2011-04-20 15:21 ` Christoph Hellwig
2011-04-20 17:21 ` Ted Ts'o
[not found] ` <20110419140909.GD3030-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2011-04-19 21:08 ` Dave Chinner
2011-04-20 15:29 ` Christoph Hellwig
2011-04-16 6:05 ` Yongqiang Yang
2011-04-18 0:35 ` Dave Chinner
2011-04-15 8:53 ` Jim Meyering
2011-04-15 17:16 ` Christoph Hellwig [this message]
[not found] ` <20110415171629.GA9088-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2011-04-15 17:24 ` Eric Blake
2011-04-15 17:26 ` Christoph Hellwig
[not found] ` <20110415172603.GA20086-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2011-04-15 22:28 ` Andreas Dilger
2011-04-16 0:25 ` Dave Chinner
[not found] ` <20110414102608.GA1678-tLCgZGx+iJ+kxVt8IV0GqQ@public.gmane.org>
2011-04-20 14:39 ` Jim Meyering
[not found] ` <87d3khugv1.fsf-CybKA8TIZ99x3y/oJEDuiw@public.gmane.org>
2011-04-21 20:01 ` Jim Meyering
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