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The update on recovery is not correct. msk->tx_pending_data += msk->snd_nxt - rtx_head->data_seq; will update tx_pending_data multiple times when a subflow is declared stale while earlier recovery is still in progress. This means that tx_pending_data will still be positive even after all data as has been transmitted. Rather than fix it, remove this field: there are no consumers. The outstanding data byte count can be computed either via "msk->write_seq - rtx_head->data_seq" or "msk->write_seq - msk->snd_una". The latter is more recent/accurate estimate as rtx_head adjustment is deferred until mptcp lock can be acquired. Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.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.
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.