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When using Deep learning framework such as tensorflow or pytorch, there are tens of thousands of host memory mappings. When the user frees all those mappings at the same time, the process of unmapping and unpinning them can take a long time, which may cause a soft lockup bug. To prevent this, we need to free the core to do other things during the unmapping process. For now, we chose to do it every 32K unmappings (each unmap is a single 4K page). Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
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.