+ sector_t io_opt_sectors = limits->io_opt >> SECTOR_SHIFT;
+
+ /*
+ * Adjust max_sectors_kb to highest possible power-of-2
+ * factor of pool->sectors_per_block.
+ */
+ if (limits->max_hw_sectors & (limits->max_hw_sectors - 1))
+ limits->max_sectors = rounddown_pow_of_two(limits->max_hw_sectors);
+ else
+ limits->max_sectors = limits->max_hw_sectors;
+
+ if (limits->max_sectors < pool->sectors_per_block) {
+ while (!is_factor(pool->sectors_per_block, limits->max_sectors)) {
+ if ((limits->max_sectors & (limits->max_sectors - 1)) == 0)
+ limits->max_sectors--;
+ limits->max_sectors = rounddown_pow_of_two(limits->max_sectors);
+ }
+ } else if (block_size_is_power_of_two(pool)) {
+ /* max_sectors_kb is >= power-of-2 thinp blocksize */
+ while (!is_factor(limits->max_sectors, pool->sectors_per_block)) {
+ if ((limits->max_sectors & (limits->max_sectors - 1)) == 0)
+ limits->max_sectors--;
+ limits->max_sectors = rounddown_pow_of_two(limits->max_sectors);
+ }
+ }