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3687fcb075
The current auto-reclaim algorithm starts reclaiming all block groups with a zone_unusable value above a configured threshold. This is causing a lot of reclaim IO even if there would be enough free zones on the device. Instead of only accounting a block groups zone_unusable value, also take the ratio of free and not usable (written as well as zone_unusable) bytes a device has into account. Tested-by: Pankaj Raghav <p.raghav@samsung.com> Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> 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 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.