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In do_md_run(), md threads should not wake up until the array is fully initialized in md_run(). However, in raid5_run(), raid5-cache may wake up mddev->thread to flush stripes that need to be written back. This design doesn't break badly right now. But it could lead to bad bug in the future. This patch tries to resolve this problem by splitting start up work into two personality functions, run() and start(). Tasks that do not require the md threads should go into run(), while task that require the md threads go into start(). r5l_load_log() is moved to raid5_start(), so it is not called until the md threads are started in do_md_run(). Signed-off-by: Song Liu <songliubraving@fb.com> Signed-off-by: Shaohua Li <shli@fb.com> |
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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.