18c2ecf20Sopenharmony_ci# SPDX-License-Identifier: GPL-2.0 28c2ecf20Sopenharmony_ciif BLOCK 38c2ecf20Sopenharmony_ci 48c2ecf20Sopenharmony_cimenu "IO Schedulers" 58c2ecf20Sopenharmony_ci 68c2ecf20Sopenharmony_ciconfig MQ_IOSCHED_DEADLINE 78c2ecf20Sopenharmony_ci tristate "MQ deadline I/O scheduler" 88c2ecf20Sopenharmony_ci default y 98c2ecf20Sopenharmony_ci help 108c2ecf20Sopenharmony_ci MQ version of the deadline IO scheduler. 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_ciconfig MQ_IOSCHED_KYBER 138c2ecf20Sopenharmony_ci tristate "Kyber I/O scheduler" 148c2ecf20Sopenharmony_ci default y 158c2ecf20Sopenharmony_ci help 168c2ecf20Sopenharmony_ci The Kyber I/O scheduler is a low-overhead scheduler suitable for 178c2ecf20Sopenharmony_ci multiqueue and other fast devices. Given target latencies for reads and 188c2ecf20Sopenharmony_ci synchronous writes, it will self-tune queue depths to achieve that 198c2ecf20Sopenharmony_ci goal. 208c2ecf20Sopenharmony_ci 218c2ecf20Sopenharmony_ciconfig IOSCHED_BFQ 228c2ecf20Sopenharmony_ci tristate "BFQ I/O scheduler" 238c2ecf20Sopenharmony_ci help 248c2ecf20Sopenharmony_ci BFQ I/O scheduler for BLK-MQ. BFQ distributes the bandwidth of 258c2ecf20Sopenharmony_ci of the device among all processes according to their weights, 268c2ecf20Sopenharmony_ci regardless of the device parameters and with any workload. It 278c2ecf20Sopenharmony_ci also guarantees a low latency to interactive and soft 288c2ecf20Sopenharmony_ci real-time applications. Details in 298c2ecf20Sopenharmony_ci Documentation/block/bfq-iosched.rst 308c2ecf20Sopenharmony_ci 318c2ecf20Sopenharmony_ciconfig BFQ_GROUP_IOSCHED 328c2ecf20Sopenharmony_ci bool "BFQ hierarchical scheduling support" 338c2ecf20Sopenharmony_ci depends on IOSCHED_BFQ && BLK_CGROUP 348c2ecf20Sopenharmony_ci select BLK_CGROUP_RWSTAT 358c2ecf20Sopenharmony_ci help 368c2ecf20Sopenharmony_ci 378c2ecf20Sopenharmony_ci Enable hierarchical scheduling in BFQ, using the blkio 388c2ecf20Sopenharmony_ci (cgroups-v1) or io (cgroups-v2) controller. 398c2ecf20Sopenharmony_ci 408c2ecf20Sopenharmony_ciconfig BFQ_CGROUP_DEBUG 418c2ecf20Sopenharmony_ci bool "BFQ IO controller debugging" 428c2ecf20Sopenharmony_ci depends on BFQ_GROUP_IOSCHED 438c2ecf20Sopenharmony_ci help 448c2ecf20Sopenharmony_ci Enable some debugging help. Currently it exports additional stat 458c2ecf20Sopenharmony_ci files in a cgroup which can be useful for debugging. 468c2ecf20Sopenharmony_ci 478c2ecf20Sopenharmony_ciendmenu 488c2ecf20Sopenharmony_ci 498c2ecf20Sopenharmony_ciendif 50