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8322a9376e
This helps with lock contention in the journalling code: instead of updating our journal pin on every write, only get a journal pin if we don't have one. This means we can avoid hammering on journal locks nearly so much, at the cost of carrying around a journal pin for an older entry than the one we actually need. To handle that, if needed we update our journal pin to the correct one when flushed by journal reclaim. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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.