On Wed, Feb 07 2001, Stephen C. Tweedie wrote:
> > [overhead of 512-byte bhs in the raw IO code is an artificial problem of
> > the raw IO code.]
>
> No, it is a problem of the ll_rw_block interface: buffer_heads need to
> be aligned on disk at a multiple of their buffer size. Under the Unix
> raw IO interface it is perfectly legal to begin a 128kB IO at offset
> 512 bytes into a device.
Submitting buffers to lower layers that are not hw sector aligned
can't be supported below ll_rw_blk anyway (they can, but look at the
problems this has always created), and I would much rather see stuff
like this handled outside of there.
-- Jens Axboe- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Wed Feb 07 2001 - 21:00:25 EST