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By moving one field around in 'struct urb' we reduce the size of the structure by 8 bytes. Before the patch on x86_64 the overall size of the structure as reported by pahole was: /* size: 192, cachelines: 3, members: 30 */ /* sum members: 184, holes: 2, sum holes: 8 */ After the patch we now have: /* size: 184, cachelines: 3, members: 30 */ /* last cacheline: 56 bytes */ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.
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