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The BIOSET_NEED_RESCUER flag is only needed when a make_request_fn might do two allocations from the one bioset, and the second one could block until the first bio completes. dm_io() is called from make_request_fn() context. The closest it comes to multiple allocations is in chunk_io() in dm-snap-persistent. But there the code uses a separate thread to avoid problems. So BIOSET_NEED_RESCUER is not needed. Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
570 lines
14 KiB
570 lines
14 KiB