mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-10 13:59:45 -04:00
97b2409f28
We used to do twice copy_from_iter() to copy virtio-net and packet separately. This introduce overheads for userspace access hardening as well as SMAP (for x86 it's stac/clac). So this patch tries to use one copy_from_iter() to copy them once and move the virtio-net header afterwards to reduce overheads. Testpmd + vhost_net shows 10% improvement from 5.45Mpps to 6.0Mpps. Signed-off-by: Jason Wang <jasowang@redhat.com> Link: https://patch.msgid.link/20250701010352.74515-2-jasowang@redhat.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 reStructuredText 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.