On Wed, 2007-03-21 at 22:37 -0400, Douglas Gilbert wrote:
In my experience mmap-ed IO using sg's reserve buffer mapped
into the user space is faster than direct IO schemes. However
one shortcoming is that if you try to copy between two devices
using this technique then you end up with two
I mentioned this idea a few weeks ago on this list: namely
to allow a sg pass-through request to use the mmap-ed
reserve buffer associated with another sg file descriptor.
In my experience mmap-ed IO using sg's reserve buffer mapped
into the user space is faster than direct IO schemes. However
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