jimharris bab4c585f3 nvd: add hw.nvd.delete_max tunable ... The NVMe specification does not define a maximum or optimal delete size, so technically max delete size is min(full size of namespace, 2^32 - 1 LBAs). A single delete operation for a multi-TB NVMe namespace though may take much longer to complete than the nvme(4) I/O timeout period. So choose a sensible default here that is still suitably large to minimize the number of overall delete operations. This also fixes possible uint32_t overflow on initial TRIM operation for zpool create operations for NVMe namespaces with >4G LBAs. MFC after: 3 days Sponsored by: Intel		2016-01-28 23:15:14 +00:00
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nvd.c	nvd: add hw.nvd.delete_max tunable	2016-01-28 23:15:14 +00:00