On Wed, Mar 07 2001, Rik van Riel wrote:
> > > how would you feel about having the block device layer 64-bit
> > > capable, so Linux can have block devices of more than 2GB in
> > > size ?
> >
> > I already did this here, or something similar at least. Using
> > a sector_t type that is 64-bit, regardless of platform. Is it
> > really worth it to differentiate and use 32-bit types for old
> > machines?
>
> Wonderful !
>
> I'm not sure how expensive 64-bit arithmetic would be on
> eg. 386, 486 or 68k machines, or how much impact the extra
> memory taken would have.
>
> OTOH, I'm not sure what problems it could give to make this
> a compile-time option...
Plus compile time options are nasty :-). It would probably make
bigger sense to completely skip all the merging etc for low end
machines. I think they already do this for embedded kernels (ie
removing ll_rw_blk.c and elevator.c). That avoids most of the
64-bit arithmetic anyway.
-- Jens Axboe- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Wed Mar 07 2001 - 21:00:23 EST