37324e6bb1
Cache deferral injection stress-tests the cache deferral logic as well as upper layer protocol deferred request handlers. This facility is for developers and professional testers to ensure coverage of the rqst deferral code paths. To date, we haven't had an adequate way to ensure these code paths are covered during testing, short of temporary code changes to force their use. A file called /sys/kernel/debug/fail_sunrpc/ignore-cache-wait enables administrators to disable cache deferral injection while allowing other types of sunrpc errors to be injected. The default setting is that cache deferral injection is enabled (ignore=false). To enable support for cache deferral injection, CONFIG_FAULT_INJECTION, CONFIG_FAULT_INJECTION_DEBUG_FS, and CONFIG_SUNRPC_DEBUG must all be set to "Y". Signed-off-by: Chuck Lever <chuck.lever@oracle.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.