ca460b3c96
This patch introduces the bitmap metadata blocks and adds the skeleton of the code that will be used to maintain these blocks. Each chunk's bitmap is made up of full metadata blocks. These blocks maintain basic metadata to help prevent scanning unnecssarily to update hints. Full scanning methods are used for the skeleton and will be replaced in the coming patches. A number of helper functions are added as well to do conversion of pages to blocks and manage offsets. Comments will be updated as the final version of each function is added. There exists a relationship between PAGE_SIZE, PCPU_BITMAP_BLOCK_SIZE, the region size, and unit_size. Every chunk's region (including offsets) is page aligned at the beginning to preserve alignment. The end is aligned to LCM(PAGE_SIZE, PCPU_BITMAP_BLOCK_SIZE) to ensure that the end can fit with the populated page map which is by page and every metadata block is fully accounted for. The unit_size is already page aligned, but must also be aligned with PCPU_BITMAP_BLOCK_SIZE to ensure full metadata blocks. 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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| Documentation | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
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.