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Because we clear XPRT_SOCK_DATA_READY before reading, we can end up with a situation where new data arrives, causing xs_data_ready() to queue up a second receive worker job for the same socket, which then immediately gets stuck waiting on the transport receive mutex. The fix is to only clear XPRT_SOCK_DATA_READY once we're done reading, and then to use poll() to check if we might need to queue up a new job in order to deal with any new data. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
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.