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ec26c225f0
io_do_iopoll() and io_submit_flush_completions() are pretty similar, both filling CQEs and then free a list of requests. Don't duplicate it and make iopoll use __io_submit_flush_completions(), which also helps with inlining and other optimisations. For that, we need to first find all completed iopoll requests and splice them from the iopoll list and then pass it down. This adds one extra list traversal, which should be fine as requests will stay hot in cache. CQ locking is already conditional, introduce ->lockless_cq and skip locking for IOPOLL as it's protected by ->uring_lock. We also add a wakeup optimisation for IOPOLL to __io_cq_unlock_post(), so it works just like io_cqring_ev_posted_iopoll(). Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/3840473f5e8a960de35b77292026691880f6bdbc.1692916914.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.