de57a25108
When using epoll-based busy poll, the prefer_busy_poll option is hardcoded to false. Users may want to enable prefer_busy_poll to be used in conjunction with gro_flush_timeout and defer_hard_irqs_count to keep device IRQs masked. Other busy poll methods allow enabling or disabling prefer busy poll via SO_PREFER_BUSY_POLL, but epoll-based busy polling uses a hardcoded value. Fix this edge case by adding support for a per-epoll context prefer_busy_poll option. The default is false, as it was hardcoded before this change. Signed-off-by: Joe Damato <jdamato@fastly.com> Acked-by: Stanislav Fomichev <sdf@google.com> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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.