| To: | Jim Meyering <jim@xxxxxxxxxxxx> |
|---|---|
| Subject: | Re: Files full of zeros with coreutils-8.11 and xfs (FIEMAP related?) |
| From: | Christoph Hellwig <hch@xxxxxxxxxxxxx> |
| Date: | Fri, 15 Apr 2011 13:16:29 -0400 |
| Cc: | Dave Chinner <david@xxxxxxxxxxxxx>, P?draig Brady <P@xxxxxxxxxxxxxx>, linux-ext4@xxxxxxxxxxxxxxx, Eric Sandeen <sandeen@xxxxxxxxxxx>, coreutils@xxxxxxx, Markus Trippelsdorf <markus@xxxxxxxxxxxxxxx>, xfs-oss <xfs@xxxxxxxxxxx> |
| In-reply-to: | <87sjtjq4ir.fsf@xxxxxxxxxxxxxxxx> |
| References: | <20110414102608.GA1678@xxxxxxxxxxxxxx> <20110414120635.GB1678@xxxxxxxxxxxxxx> <20110414140222.GB1679@xxxxxxxxxxxxxx> <4DA70BD3.1070409@xxxxxxxxxxxxxx> <4DA717B2.3020305@xxxxxxxxxxx> <20110414225904.GK21395@dastard> <4DA7836A.5040604@xxxxxxxxxxxxxx> <20110415000940.GL21395@dastard> <87sjtjq4ir.fsf@xxxxxxxxxxxxxxxx> |
| User-agent: | Mutt/1.5.21 (2010-09-15) |
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. |
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