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75c10e7327
Implement a simple round-robin I/O policy for multipathing. Path selection is done in two rounds, first iterating across all optimized paths, and if that doesn't return any valid paths, iterate over all optimized and non-optimized paths. If no paths are found, use the existing algorithm. Also add a sysfs attribute 'iopolicy' to switch between the current NUMA-aware I/O policy and the 'round-robin' I/O policy. Signed-off-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Christoph Hellwig <hch@lst.de> |
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