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4aaa9bc4d5
Same problem as with zcrx in the previous patch, the user needs to know SQ/CQ header sizes to allocated memory before setup to use it for user provided rings, i.e. IORING_SETUP_NO_MMAP, however that information is only returned after registration, hence the user is guessing kernel implementation details. Return the header size and alignment, which is split with the same motivation, to allow the user to know the real structure size without alignment in case there will be more flexible placement schemes in the future. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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