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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/commit
raid5: Don't set read-ahead when there is no queue
dm-raid456 does not provide a 'queue' for raid5 to use,
so we must make raid5 stop depending on the queue.
First: read_ahead
dm handles read-ahead adjustment fully in userspace, so
simply don't do any readahead adjustments if there is
no queue.
Also re-arrange code slightly so all the accesses to ->queue are
together.
Finally, move the blk_queue_merge_bvec function into the 'if' as
the ->split_io setting in dm-raid456 has the same effect.
Signed-off-by: NeilBrown <neilb@suse.de>