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Date:      Mon, 31 May 2021 17:28:32 +0000
From:      bugzilla-noreply@freebsd.org
To:        fs@FreeBSD.org
Subject:   [Bug 256205] lseek() with SEEK_HOLE some times wrongly reports holes on ZFS
Message-ID:  <bug-256205-3630-nUyBxNU3C5@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-256205-3630@https.bugs.freebsd.org/bugzilla/>
References:  <bug-256205-3630@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D256205

--- Comment #17 from Robert Clausecker <fuz@fuz.su> ---
So yeah, the same approach also works on amd64.  To reproduce:

1. install archivers/star
2. make a zfs dataset and nullfs mount it somewhere.
3. in the nullfs mount, unpack the schilytools
4. build the schilytools by typing "make"
5. type

    star -c -v -f /dev/null -sparse . 2>&1 | grep sparse

   to find spurious sparse files.

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