162306a36Sopenharmony_ci# SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_cimenu "IO Schedulers" 362306a36Sopenharmony_ci 462306a36Sopenharmony_ciconfig MQ_IOSCHED_DEADLINE 562306a36Sopenharmony_ci tristate "MQ deadline I/O scheduler" 662306a36Sopenharmony_ci default y 762306a36Sopenharmony_ci help 862306a36Sopenharmony_ci MQ version of the deadline IO scheduler. 962306a36Sopenharmony_ci 1062306a36Sopenharmony_ciconfig MQ_IOSCHED_KYBER 1162306a36Sopenharmony_ci tristate "Kyber I/O scheduler" 1262306a36Sopenharmony_ci default y 1362306a36Sopenharmony_ci help 1462306a36Sopenharmony_ci The Kyber I/O scheduler is a low-overhead scheduler suitable for 1562306a36Sopenharmony_ci multiqueue and other fast devices. Given target latencies for reads and 1662306a36Sopenharmony_ci synchronous writes, it will self-tune queue depths to achieve that 1762306a36Sopenharmony_ci goal. 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ciconfig IOSCHED_BFQ 2062306a36Sopenharmony_ci tristate "BFQ I/O scheduler" 2162306a36Sopenharmony_ci select BLK_ICQ 2262306a36Sopenharmony_ci help 2362306a36Sopenharmony_ci BFQ I/O scheduler for BLK-MQ. BFQ distributes the bandwidth of 2462306a36Sopenharmony_ci of the device among all processes according to their weights, 2562306a36Sopenharmony_ci regardless of the device parameters and with any workload. It 2662306a36Sopenharmony_ci also guarantees a low latency to interactive and soft 2762306a36Sopenharmony_ci real-time applications. Details in 2862306a36Sopenharmony_ci Documentation/block/bfq-iosched.rst 2962306a36Sopenharmony_ci 3062306a36Sopenharmony_ciconfig BFQ_GROUP_IOSCHED 3162306a36Sopenharmony_ci bool "BFQ hierarchical scheduling support" 3262306a36Sopenharmony_ci depends on IOSCHED_BFQ && BLK_CGROUP 3362306a36Sopenharmony_ci default y 3462306a36Sopenharmony_ci select BLK_CGROUP_RWSTAT 3562306a36Sopenharmony_ci help 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ci Enable hierarchical scheduling in BFQ, using the blkio 3862306a36Sopenharmony_ci (cgroups-v1) or io (cgroups-v2) controller. 3962306a36Sopenharmony_ci 4062306a36Sopenharmony_ciconfig BFQ_CGROUP_DEBUG 4162306a36Sopenharmony_ci bool "BFQ IO controller debugging" 4262306a36Sopenharmony_ci depends on BFQ_GROUP_IOSCHED 4362306a36Sopenharmony_ci help 4462306a36Sopenharmony_ci Enable some debugging help. Currently it exports additional stat 4562306a36Sopenharmony_ci files in a cgroup which can be useful for debugging. 4662306a36Sopenharmony_ci 4762306a36Sopenharmony_ciendmenu 48