[Bug 256205] lseek() with SEEK_HOLE some times wrongly reports holes on ZFS

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 31 May 2021 13:43:43 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256205

Alan Somers <asomers@FreeBSD.org> changed:

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                 CC|                            |asomers@FreeBSD.org

--- Comment #5 from Alan Somers <asomers@FreeBSD.org> ---
Let's take a look at the layout of the good vs bad files.  First, do "ls -li"
to get the inode number of the bad file (ved) and the good file (ved.copy). 
Then do "sudo zdb -ddddd <pool>/<dataset> <inode>".  That will show exactly
where ZFS thinks there are holes.

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