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raid10 splits requests in two different ways for two different reasons. First, bio_split() is used to ensure the bio fits with a chunk. Second, multiple r10bio structures are allocated to represent the different sections that need to go to different devices, to avoid known bad blocks. This can be simplified to just use bio_split() once, and not to use multiple r10bios. We delay the split until we know a maximum bio size that can be handled with a single r10bio, and then split the bio and queue the remainder for later handling. As with raid1, we allocate a new bio_set to help with the splitting. It is not correct to use fs_bio_set in a device driver. Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Shaohua Li <shli@fb.com>
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.