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Guoqing Jiang
10c92fca63
Since we can enable write-behind mode by write backlog node, so create wb_info_pool if the mode is just enabled, also call call md_bitmap_update_sb to make user aware the write-behind mode is enabled. Conversely, wb_info_pool should be destroyed when write-behind mode is disabled. Beside above, it is better to update bitmap sb if we change the number of max_write_behind. Reviewed-by: NeilBrown <neilb@suse.com> Signed-off-by: Guoqing Jiang <gqjiang@suse.com> Signed-off-by: Song Liu <songliubraving@fb.com>
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.