--------
In message <canczdfp5udch-sldvvvhkb0dtnhup0tz8yt0tujkf8egazg...@mail.gmail.com>
, Warner Losh writes:

>On a raw device it would be translated into a BIO_DELETE command directly,
>correct?

We already have ioctl(DIOCGDELETE) for that.  newfs(8) uses it.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
p...@freebsd.org         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
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