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| author | Vivek Goyal <vgoyal@redhat.com> | 2010-09-15 17:06:35 -0400 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2010-09-16 08:42:52 +0200 |
| commit | e43473b7f223ec866f7db273697e76c337c390f9 (patch) | |
| tree | e90b52dbe4ec4ae37263a00e2bd9eaf5367cf72f /init/Kconfig | |
| parent | 4c9eefa16c6f124ffcc736cb719b24ea27f85017 (diff) | |
| download | lwn-e43473b7f223ec866f7db273697e76c337c390f9.tar.gz lwn-e43473b7f223ec866f7db273697e76c337c390f9.zip | |
blkio: Core implementation of throttle policy
o Actual implementation of throttling policy in block layer. Currently it
implements READ and WRITE bytes per second throttling logic. IOPS throttling
comes in later patches.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'init/Kconfig')
| -rw-r--r-- | init/Kconfig | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/init/Kconfig b/init/Kconfig index 2de5b1cbadd9..950ba26f7233 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -634,11 +634,14 @@ config BLK_CGROUP Currently, CFQ IO scheduler uses it to recognize task groups and control disk bandwidth allocation (proportional time slice allocation) - to such task groups. + to such task groups. It is also used by bio throttling logic in + block layer to implement upper limit in IO rates on a device. This option only enables generic Block IO controller infrastructure. - One needs to also enable actual IO controlling logic in CFQ for it - to take effect. (CONFIG_CFQ_GROUP_IOSCHED=y). + One needs to also enable actual IO controlling logic/policy. For + enabling proportional weight division of disk bandwidth in CFQ seti + CONFIG_CFQ_GROUP_IOSCHED=y and for enabling throttling policy set + CONFIG_BLK_THROTTLE=y. See Documentation/cgroups/blkio-controller.txt for more information. |