IOS_RQ_HISTO
#define IOS_RQ_HISTO_M (1ULL << IOS_RQ_HISTO)
[IOS_RQ_HISTO] = {
[IOS_RQ_HISTO] = {{"sync_read", 2}, {"sync_write", 2},
[IOS_RQ_HISTO] = {{"ind"}, {"agg"}, {"ind"}, {"agg"}, {"ind"}, {"agg"},
[IOS_RQ_HISTO] = "req_size",
[IOS_RQ_HISTO] = 6, /* 1M queue entries */
[IOS_L_HISTO] = 'w', [IOS_RQ_HISTO] = 'r'};