2e52213c79
We can't lock_sock() the mptcp socket from the subflow data_ready callback, it would result in ABBA deadlock with the subflow socket lock. We can however grab the spinlock: if that succeeds and the mptcp socket is not owned at the moment, we can process the new skbs right away without deferring this to the work queue. This avoids the schedule_work and hence the small delay until the work item is processed. Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-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.