cvs commit: src/sys/sys mdioctl.h src/sys/dev/md md.c src/sbin/mdconfig mdconfig.8 mdconfig.c

[Colin Percival]

At 06:35 11/03/2004, Poul-Henning Kamp wrote:
>In message <6.0.1.1.1.20040311062306.03f9ade0 at imap.sfu.ca>, Colin Percival 
>writ
>es:
> ><kernelnewbie>
> >   Is it really necessary for vnode-backed memory disks to be
> >accessed through the filesystem?  Why can't md(4) hijack the
> >disk blocks which constitute the file (telling the filesystem
> >not to touch them, of course) and translate I/O operations
> >directly into I/O on the underlying device?
> ></kernelnewbie>
>
>That would be a really complex solution to a problem which should not
>exist in the first place :-)

   Well... yes, but it *would* make sure that data didn't get passed
back up to the filesystem layer.  And it would probably be faster,
which is why I thought of it.

Colin Percival