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author | Mike Snitzer <snitzer@redhat.com> | 2020-09-22 05:32:49 +0300 |
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committer | Jens Axboe <axboe@kernel.dk> | 2020-09-23 19:38:14 +0300 |
commit | 07d098e6bbad04030dab5b3e64149601fcb063ce (patch) | |
tree | 43d4d82eda0a5ea4e466a5ac0fd2125865e65b11 /block/genhd.c | |
parent | 22ada802ede89829dd010a317d9b812b7df7111a (diff) | |
download | linux-07d098e6bbad04030dab5b3e64149601fcb063ce.tar.xz |
block: allow 'chunk_sectors' to be non-power-of-2
It is possible, albeit more unlikely, for a block device to have a non
power-of-2 for chunk_sectors (e.g. 10+2 RAID6 with 128K chunk_sectors,
which results in a full-stripe size of 1280K. This causes the RAID6's
io_opt to be advertised as 1280K, and a stacked device _could_ then be
made to use a blocksize, aka chunk_sectors, that matches non power-of-2
io_opt of underlying RAID6 -- resulting in stacked device's
chunk_sectors being a non power-of-2).
Update blk_queue_chunk_sectors() and blk_max_size_offset() to
accommodate drivers that need a non power-of-2 chunk_sectors.
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/genhd.c')
0 files changed, 0 insertions, 0 deletions