6787927475
Default socket receive buffer size for a listener socket is 2Mb. For each arriving empty SYN, the linux kernel allocates a 768 bytes buffer. This means that a listener socket can serve maximum 2700 simultaneous empty connection setup requests before it hits a receive buffer overflow, and much fewer if the SYN is carrying any significant amount of data. When this happens the setup request is rejected, and the client receives an ECONNREFUSED error. This commit mitigates this problem by letting the client socket try to retransmit the SYN message multiple times when it sees it rejected with the code TIPC_ERR_OVERLOAD. Retransmission is done at random intervals in the range of [100 ms, setup_timeout / 4], as many times as there is room for within the setup timeout limit. Signed-off-by: Tung Nguyen <tung.q.nguyen@dektech.com.au> Acked-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.