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185f203a69
When fewer pages are read, nr_pages may be smaller than nr_cpages. Due to the nr_vecs limit, the compressed pages will be split into multiple bios and then merged at the block level. In this case, nr_cpages should be used to pre-allocate bvecs. To handle this case, align max_nr_pages to cluster_size, which should be enough for all compressed pages. Signed-off-by: Jianan Huang <huangjianan@xiaomi.com> Signed-off-by: Sheng Yong <shengyong1@xiaomi.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@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 reStructuredText 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.