tree 750ac9c551a1791792c7a15b104c0684aa393c04
parent 6224590d242fc8c6b26941328e02a40b4384949b
author Pavel Begunkov <asml.silence@gmail.com> 1633374166 +0100
committer Jens Axboe <axboe@kernel.dk> 1634644194 -0600

io_uring: optimise kiocb layout

We want ->comp_list in the second cacheline, which is hotter comparing
to the 3rd. Swap the field with ->link, which is not as hot and
controlled by flags and so not accessed unless there is a link.

By the way add a couple of comments for io_kiocb fields.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/9d9dde31f8f62279a5f48c575bbc27b8290edc0c.1633373302.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>