Re: performance of O_DIRECT on md/lvm

Benjamin LaHaise (bcrl@redhat.com)
Mon, 21 Jan 2002 00:35:52 -0500

On Mon, Jan 21, 2002 at 02:12:24AM +0100, Andrea Arcangeli wrote:
> yes, in short the API to allow the userspace to keep the I/O pipeline
> full with a ring of user buffers is not available at the moment.

See http://www.kvack.org/~blah/aio/ . Seems to work pretty nicely
for raw io.

-ben
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