13f1555c1b
Davide Caratti says: ==================== MPTCP: improve fallback to TCP there are situations where MPTCP sockets should fall-back to regular TCP: this series reworks the fallback code to pursue the following goals: 1) cleanup the non fallback code, removing most of 'if (<fallback>)' in the data path 2) improve performance for non-fallback sockets, avoiding locks in poll() further work will also leverage on this changes to achieve: a) more consistent behavior of gestockopt()/setsockopt() on passive sockets after fallback b) support for "infinite maps" as per RFC8684, section 3.7 the series is made of the following items: - patch 1 lets sendmsg() / recvmsg() / poll() use the main socket also after fallback - patch 2 fixes 'simultaneous connect' scenario after fallback. The problem was present also before the rework, but the fix is much easier to implement after patch 1 - patch 3, 4, 5 are clean-ups for code that is no more needed after the fallback rework - patch 6 fixes a race condition between close() and poll(). The problem was theoretically present before the rework, but it became almost systematic after patch 1 ==================== 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
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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.