On Wed, May 24, 2006 at 10:01:35PM +0800, Limin Wang wrote:
>
> If the loopback files is bigger than the memory size, it may cause miss again and
> may better to turn on the read ahead?
>
The readahead is always on, it's only disabling lookahead :-)
> > Disable look-ahead for loop file.
> >
> > Loopback files normally contain filesystems, in which case there are already
> > proper look-aheads in the upper layer, more look-aheads on the loopback file
> > only ruins the read-ahead hit rate.
-
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