afr: make flush non-transactional

Flush is historically a transaction to ensure all previous writes
were complete. This is no longer required as write-behind has
learned to make flush a barrier operation (re: conversation w/
Avati).

Flush taking a full file lock causes VMs running on afr volumes
to stall when a migration occurs and self-heal is in progress.
Make afr_flush() a non-transactional operation.

BUG: 874045
Change-Id: Ie287b79e7f300df88aca6030e2d80311772746bf
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-on: https://code.engineering.redhat.com/gerrit/1912
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Tested-by: Vijay Bellur <vbellur@redhat.com>

0 files changed, 0 insertions, 0 deletions