| commit | 1bb6b81029456f4e2e6727c5167f43bdfc34bee5 | [log] [tgz] |
|---|---|---|
| author | Pavel Begunkov <asml.silence@gmail.com> | Wed Oct 27 13:21:07 2021 +0100 |
| committer | Jens Axboe <axboe@kernel.dk> | Wed Oct 27 06:54:58 2021 -0600 |
| tree | 02ea0da43b7ad152375b9fb59cd2c90ed0acb1cf | |
| parent | a2247f19ee1c5ad75ef095cdfb909a3244b88aa8 [diff] |
block: avoid extra iter advance with async iocb Nobody cares about iov iterators state if we return -EIOCBQUEUED, so as the we now have __blkdev_direct_IO_async(), which gets pages only once, we can skip expensive iov_iter_advance(). It's around 1-2% of all CPU spent. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/a6158edfbfa2ae3bc24aed29a72f035df18fad2f.1635337135.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>