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| author | Bart Van Assche <bvanassche@acm.org> | 2021-06-18 02:44:44 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-06-21 23:03:40 +0200 |
| commit | 556910e39249d55e23deaec479f49e7d85bc0d24 (patch) | |
| tree | a62be8dec496a444ab8e691e406ee33609939246 /block/Kconfig | |
| parent | block/blk-rq-qos: Move a function from a header file into a C file (diff) | |
| download | linux-556910e39249d55e23deaec479f49e7d85bc0d24.tar.xz linux-556910e39249d55e23deaec479f49e7d85bc0d24.zip | |
block: Introduce the ioprio rq-qos policy
Introduce an rq-qos policy that assigns an I/O priority to requests based
on blk-cgroup configuration settings. This policy has the following
advantages over the ioprio_set() system call:
- This policy is cgroup based so it has all the advantages of cgroups.
- While ioprio_set() does not affect page cache writeback I/O, this rq-qos
controller affects page cache writeback I/O for filesystems that support
assiociating a cgroup with writeback I/O. See also
Documentation/admin-guide/cgroup-v2.rst.
Cc: Damien Le Moal <damien.lemoal@wdc.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20210618004456.7280-5-bvanassche@acm.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/Kconfig')
| -rw-r--r-- | block/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/block/Kconfig b/block/Kconfig index 6685578b2a20..e71c63eaaf52 100644 --- a/block/Kconfig +++ b/block/Kconfig @@ -162,6 +162,15 @@ config BLK_CGROUP_IOCOST distributes IO capacity between different groups based on their share of the overall weight distribution. +config BLK_CGROUP_IOPRIO + bool "Cgroup I/O controller for assigning an I/O priority class" + depends on BLK_CGROUP + help + Enable the .prio interface for assigning an I/O priority class to + requests. The I/O priority class affects the order in which an I/O + scheduler and block devices process requests. Only some I/O schedulers + and some block devices support I/O priorities. + config BLK_DEBUG_FS bool "Block layer debugging information in debugfs" default y |