be62c51988
When large folios supported, one folio can be split into several slices, each of which may be mapped to META/UNMAPPED/MAPPED, and the folio can be unlocked as a whole only when all slices have completed. Thus always allocate erofs_fscache_request for each .read_folio() or .readahead(), in which case the allocated request is responsible for unlocking folios when all slices have completed. As described above, each folio or folio range can be mapped into several slices, while these slices may be mapped to different cookies, and thus each slice needs its own netfs_cache_resources. Here we introduce chained requests to support this, where each .read_folio() or .readahead() calling can correspond to multiple requests. Each request has its own netfs_cache_resources and thus is used to access one cookie. Among these requests, there's a primary request, with the others pointing to the primary request. Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com> Reviewed-by: Jia Zhu <zhujia.zj@bytedance.com> Link: https://lore.kernel.org/r/20221201074256.16639-2-jefflexu@linux.alibaba.com Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com> |
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|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.