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ec8cb4f617
This patch adds a test that has 300 VIPs listening on port 443. Each VIP:443 will have 80 listening socks by using SO_REUSEPORT. Thus, it will have 24000 listening socks. Before removing the port only listening_hash, all socks will be in the same port 443 bucket and inet_reuseport_add_sock() spends much time to walk through the bucket. After removing the port only listening_hash and move all usage to the port+addr lhash2, each bucket in the ideal case has 80 sk which is much smaller than before. Here is the test result from a qemu: Before: listen 24000 socks took 210.210485362 (~210s) After: listen 24000 socks took 0.207173 (~210ms) Signed-off-by: Martin KaFai Lau <kafai@fb.com> Reviewed-by: Eric Dumazet <edumazet@google.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
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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.