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The user space Jitter RNG library uses the oversampling rate of 3 which implies that each time stamp is credited with 1/3 bit of entropy. To obtain 256 bits of entropy, 768 time stamps need to be sampled. The increase in OSR is applied based on a report where the Jitter RNG is used on a system exhibiting a challenging environment to collect entropy. This OSR default value is now applied to the Linux kernel version of the Jitter RNG as well. The increase in the OSR from 1 to 3 also implies that the Jitter RNG is now slower by default. Reported-by: Jeff Barnes <jeffbarnes@microsoft.com> Signed-off-by: Stephan Mueller <smueller@chronox.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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 reStructuredText 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.