8042b5b715
When snapshots arrive, we won't necessarily be able to arbitrarily split existis - when we need to split an existing extent, we'll have to check if the extent was overwritten in child snapshots and if so emit a whiteout for the split in the child snapshot. Because extents couldn't span btree nodes previously, journal replay would sometimes have to split existing extents. That's no good anymore, but fortunately since extent handling has already been lifted above most of the btree code there's no real need for that rule anymore. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> 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.