md/raid5: make chunk_aligned_read() split bios more cleanly.

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chunk_aligned_read() currently uses fs_bio_set - which is meant for
filesystems to use - and loops if multiple splits are needed, which is
not best practice.
As this is only used for READ requests, not writes, it is unlikely
to cause a problem.  However it is best to be consistent in how
we split bios, and to follow the pattern used in raid1/raid10.

So create a private bioset, bio_split, and use it to perform a single
split, submitting the remainder to generic_make_request() for later
processing.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>

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NeilBrown 2017-04-05 14:05:51 +10:00 • committed by Shaohua Li

parent 545250f248

commit dd7a8f5dee

2 changed files with 18 additions and 16 deletions

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drivers/md/raid5.c

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drivers/md/raid5.h

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