Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait

Linus Torvalds
2001-02-07T00:42:42Z

On Tue, 6 Feb 2001, Ingo Molnar wrote:
>
> On Wed, 7 Feb 2001, Stephen C. Tweedie wrote:
>
> > 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.
>
> then we should either fix this limitation, or the raw IO code should split
> the request up into several, variable-size bhs, so that the range is
> filled out optimally with aligned bhs.

As mentioned, no such limitation exists if you just use the right
interfaces.

Linus