0e962e755b
Periodic reclaim attempts to avoid block_groups seeing active use with a sweep mark that gets cleared on allocation and set on a sweep. In urgent conditions where we have very little unallocated space (less than one chunk used by the threshold calculation for the unallocated target), we want to be able to override this mechanism. Introduce a second pass that only happens if we fail to find a reclaim candidate and reclaim is urgent. In that case, do a second pass where all block groups are eligible. Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Boris Burkov <boris@bur.io> Signed-off-by: David Sterba <dsterba@suse.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 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.