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Diffstat (limited to 'block/Kconfig.iosched')
-rw-r--r-- | block/Kconfig.iosched | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/block/Kconfig.iosched b/block/Kconfig.iosched new file mode 100644 index 000000000..a4a8914bf --- /dev/null +++ b/block/Kconfig.iosched @@ -0,0 +1,105 @@ +# SPDX-License-Identifier: GPL-2.0 +if BLOCK + +menu "IO Schedulers" + +config IOSCHED_NOOP + bool + default y + ---help--- + The no-op I/O scheduler is a minimal scheduler that does basic merging + and sorting. Its main uses include non-disk based block devices like + memory devices, and specialised software or hardware environments + that do their own scheduling and require only minimal assistance from + the kernel. + +config IOSCHED_DEADLINE + tristate "Deadline I/O scheduler" + default y + ---help--- + The deadline I/O scheduler is simple and compact. It will provide + CSCAN service with FIFO expiration of requests, switching to + a new point in the service tree and doing a batch of IO from there + in case of expiry. + +config IOSCHED_CFQ + tristate "CFQ I/O scheduler" + default y + ---help--- + The CFQ I/O scheduler tries to distribute bandwidth equally + among all processes in the system. It should provide a fair + and low latency working environment, suitable for both desktop + and server systems. + + This is the default I/O scheduler. + +config CFQ_GROUP_IOSCHED + bool "CFQ Group Scheduling support" + depends on IOSCHED_CFQ && BLK_CGROUP + default n + ---help--- + Enable group IO scheduling in CFQ. + +choice + + prompt "Default I/O scheduler" + default DEFAULT_CFQ + help + Select the I/O scheduler which will be used by default for all + block devices. + + config DEFAULT_DEADLINE + bool "Deadline" if IOSCHED_DEADLINE=y + + config DEFAULT_CFQ + bool "CFQ" if IOSCHED_CFQ=y + + config DEFAULT_NOOP + bool "No-op" + +endchoice + +config DEFAULT_IOSCHED + string + default "deadline" if DEFAULT_DEADLINE + default "cfq" if DEFAULT_CFQ + default "noop" if DEFAULT_NOOP + +config MQ_IOSCHED_DEADLINE + tristate "MQ deadline I/O scheduler" + default y + ---help--- + MQ version of the deadline IO scheduler. + +config MQ_IOSCHED_KYBER + tristate "Kyber I/O scheduler" + default y + ---help--- + The Kyber I/O scheduler is a low-overhead scheduler suitable for + multiqueue and other fast devices. Given target latencies for reads and + synchronous writes, it will self-tune queue depths to achieve that + goal. + +config IOSCHED_BFQ + tristate "BFQ I/O scheduler" + default n + ---help--- + BFQ I/O scheduler for BLK-MQ. BFQ distributes the bandwidth of + of the device among all processes according to their weights, + regardless of the device parameters and with any workload. It + also guarantees a low latency to interactive and soft + real-time applications. Details in + Documentation/block/bfq-iosched.txt + +config BFQ_GROUP_IOSCHED + bool "BFQ hierarchical scheduling support" + depends on IOSCHED_BFQ && BLK_CGROUP + default n + ---help--- + + Enable hierarchical scheduling in BFQ, using the blkio + (cgroups-v1) or io (cgroups-v2) controller. + +endmenu + +endif |