iov_iter: import single vector iovecs as ITER_UBUF

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Add a special case to __import_iovec(), which imports a single segment
iovec as an ITER_UBUF rather than an ITER_IOVEC. ITER_UBUF is cheaper
to iterate than ITER_IOVEC, and for a single segment iovec, there's no
point in using a segmented iterator.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Jens Axboe 2023-03-24 14:37:19 -06:00

parent e03ad4ee27

commit 3b2deb0e46

1 changed files with 27 additions and 0 deletions

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lib/iov_iter.c

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