Messages in this thread | | | Date | Mon, 05 Feb 2001 13:00:51 +0100 | From | Manfred Spraul <> | Subject | Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait /notify + callback chains |
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"Stephen C. Tweedie" wrote: > > You simply cannot do physical disk IO on > non-sector-aligned memory or in chunks which aren't a multiple of > sector size.
Why not?
Obviously the disk access itself must be sector aligned and the total length must be a multiple of the sector length, but there shouldn't be any restrictions on the data buffers.
I remember that even Windoze 95 has scatter-gather support for physical disk IO with arbitraty buffer chunks. (If the hardware supports it, otherwise the io subsystem will copy the data into a contiguous temporary buffer)
-- Manfred - 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/
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