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977c7114eb
On receving an incomplete message, the existing code stores the remaining length of the cloned skb in the early_eaten field instead of incrementing the value returned by __strp_recv. This defers invocation of sock_rfree for the current skb until the next invocation of __strp_recv, which returns early_eaten if early_eaten is non-zero. This behavior causes a stall when the current message occupies the very tail end of a massive skb, and strp_peek/need_bytes indicates that the remainder of the current message has yet to arrive on the socket. The TCP receive buffer is totally full, causing the TCP window to go to zero, so the remainder of the message will never arrive. Incrementing the value returned by __strp_recv by the amount otherwise stored in early_eaten prevents stalls of this nature. Signed-off-by: Doron Roberts-Kedes <doronrk@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.