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The populated bitmap represents the state of the pages the chunk serves. Prior, the bitmap was marked completely used as the first chunk was allocated and immutable. This is misleading because the first chunk may not be completely filled. Additionally, with moving the base_addr up in the previous patch, the population check no longer corresponds to what was being checked. This patch modifies the population map to be only the number of pages the region serves and to make what it was checking correspond correctly again. The change is to remove any misunderstanding between the size of the populated bitmap and the actual size of it. The work function page iterators now use nr_pages for the check rather than pcpu_unit_pages because nr_populated is now chunk specific. Without this, the work function would try to populate the remainder of these chunks despite it not serving any more than nr_pages when nr_pages is set less than pcpu_unit_pages. Signed-off-by: Dennis Zhou <dennisszhou@gmail.com> Reviewed-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Tejun Heo <tj@kernel.org> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.