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

Ingo Molnar
2001-02-07T00:28:40Z

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.

Ingo