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83a13a4181
When iopolling the userspace specifies the minimum number of "events" it expects. Previously, we had one CQE per request, so the definition of an "event" was unequivocal, but that's not more the case anymore with REQ_F_CQE_SKIP. Currently it counts the number of completed requests, replace it with the number of posted CQEs. This allows users of the "one CQE per link" scheme to wait for all N links in a single syscall, which is not possible without the patch and requires extra context switches. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/d5a965c4d2249827392037bbd0186f87fea49c55.1638714983.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
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.