mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-11 03:52:39 -04:00
206aefde4f
With the recent flurry of additions and changes to io_uring, the layout of io_ring_ctx has become a bit stale. We're right now at 704 bytes in size on my x86-64 build, or 11 cachelines. This patch does two things: - We have to completion structs embedded, that we only use for quiesce of the ctx (or shutdown) and for sqthread init cases. That 2x32 bytes right there, let's dynamically allocate them. - Reorder the struct a bit with an eye on cachelines, use cases, and holes. With this patch, we're down to 512 bytes, or 8 cachelines. Reviewed-by: Jackie Liu <liuyun01@kylinos.cn> 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.