000fe940e5
Ideally the size would depend on the link speed, but the recycle ring is created when the interface is brought up before the driver knows the link speed. So size it for the maximum speed of a given NIC. PowerPC is only supported on SFN7xxx and SFN8xxx NICs. With this patch on a 40G NIC the number of calls to alloc_pages and friends went down from about 18% to under 2%. On a 10G NIC the number of calls to alloc_pages and friends went down from about 15% to 0 (perf did not capture any calls during the 60 second test). On a 100G NIC the number of calls to alloc_pages and friends went down from about 23% to 4%. Reported-by: Íñigo Huguet <ihuguet@redhat.com> Signed-off-by: Martin Habets <habetsm.xilinx@gmail.com> Link: https://lore.kernel.org/r/20220131111054.cp4f6foyinaarwbn@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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.