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Zach Brown
c1bd7bcce5
Refilling a client's data_avail is the only alloc_move call that doesn't try and limit the number of blocks that it dirties. If it doesn't find sufficiently large extents it can exhaust the server's alloc budget without hitting the target. It'll try to dirty blocks and return a hard error. This changes that behaviour to allow returning 0 if it moved any extents. Other callers can deal with partial progress as they already limit the blocks they dirty. This will also return ENOSPC if it hadn't moved anything just as the current code would. The result is that data fill can not necessarily hit the target. It might take multiple commits to fill the data_avail btree. Signed-off-by: Zach Brown <zab@versity.com>