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16eaab839a
Introduce an in-core counter to track the sum of all allocbt blocks used by the filesystem. This value is currently tracked per-ag via the ->agf_btreeblks field in the AGF, which also happens to include rmapbt blocks. A global, in-core count of allocbt blocks is required to identify the subset of global ->m_fdblocks that consists of unavailable blocks currently used for allocation btrees. To support this calculation at block reservation time, construct a similar global counter for allocbt blocks, populate it on first read of each AGF and update it as allocbt blocks are used and released. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com> Reviewed-by: Allison Henderson <allison.henderson@oracle.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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.