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[V7,03/18] blk-throttle: add configure option for new .low interface

Message ID e3d3888887f9c89e32314961a0e06434b4c79944.1490634565.git.shli@fb.com (mailing list archive)
State New, archived
Headers show

Commit Message

Shaohua Li March 27, 2017, 5:51 p.m. UTC 
As discussed in LSF, add configure option for the interface and mark it
as experimental, so people can try/test.

Signed-off-by: Shaohua Li <shli@fb.com>
---
 block/Kconfig | 12 ++++++++++++
 1 file changed, 12 insertions(+)
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Patch

diff --git a/block/Kconfig b/block/Kconfig
index e9f780f..89cd28f 100644
--- a/block/Kconfig
+++ b/block/Kconfig
@@ -115,6 +115,18 @@  config BLK_DEV_THROTTLING
 
 	See Documentation/cgroups/blkio-controller.txt for more information.
 
+config BLK_DEV_THROTTLING_LOW
+	bool "Block throttling .low limit interface support (EXPERIMENTAL)"
+	depends on BLK_DEV_THROTTLING
+	default n
+	---help---
+	Add .low limit interface for block throttling. The low limit is a best
+	effort limit to prioritize cgroups. Depending on the setting, the limit
+	can be used to protect cgroups in terms of bandwidth/iops and better
+	utilize disk resource.
+
+	Note, this is an experimental interface and could be changed someday.
+
 config BLK_CMDLINE_PARSER
 	bool "Block device command line partition parser"
 	default n