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yaml
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r: 254654
b: refs/heads/master
c: 9b61fc4
h: refs/heads/master
v: v3
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Andrea Righi authored and Linus Torvalds committed Jul 6, 2011
1 parent 88e0c85 commit 09f986c
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Showing 2 changed files with 7 additions and 7 deletions.
2 changes: 1 addition & 1 deletion [refs]
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@@ -1,2 +1,2 @@
---
refs/heads/master: 316b3799880c55bb20f6d2db904245eccc30e25f
refs/heads/master: 9b61fc4cf3a7232ecc39f573a1e68148ef40ea49
12 changes: 6 additions & 6 deletions trunk/Documentation/cgroups/blkio-controller.txt
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Expand Up @@ -77,7 +77,7 @@ Throttling/Upper Limit policy
- Specify a bandwidth rate on particular device for root group. The format
for policy is "<major>:<minor> <byes_per_second>".

echo "8:16 1048576" > /sys/fs/cgroup/blkio/blkio.read_bps_device
echo "8:16 1048576" > /sys/fs/cgroup/blkio/blkio.throttle.read_bps_device

Above will put a limit of 1MB/second on reads happening for root group
on device having major/minor number 8:16.
Expand All @@ -90,7 +90,7 @@ Throttling/Upper Limit policy
1024+0 records out
4194304 bytes (4.2 MB) copied, 4.0001 s, 1.0 MB/s

Limits for writes can be put using blkio.write_bps_device file.
Limits for writes can be put using blkio.throttle.write_bps_device file.

Hierarchical Cgroups
====================
Expand Down Expand Up @@ -286,28 +286,28 @@ Throttling/Upper limit policy files
specified in bytes per second. Rules are per deivce. Following is
the format.

echo "<major>:<minor> <rate_bytes_per_second>" > /cgrp/blkio.read_bps_device
echo "<major>:<minor> <rate_bytes_per_second>" > /cgrp/blkio.throttle.read_bps_device

- blkio.throttle.write_bps_device
- Specifies upper limit on WRITE rate to the device. IO rate is
specified in bytes per second. Rules are per deivce. Following is
the format.

echo "<major>:<minor> <rate_bytes_per_second>" > /cgrp/blkio.write_bps_device
echo "<major>:<minor> <rate_bytes_per_second>" > /cgrp/blkio.throttle.write_bps_device

- blkio.throttle.read_iops_device
- Specifies upper limit on READ rate from the device. IO rate is
specified in IO per second. Rules are per deivce. Following is
the format.

echo "<major>:<minor> <rate_io_per_second>" > /cgrp/blkio.read_iops_device
echo "<major>:<minor> <rate_io_per_second>" > /cgrp/blkio.throttle.read_iops_device

- blkio.throttle.write_iops_device
- Specifies upper limit on WRITE rate to the device. IO rate is
specified in io per second. Rules are per deivce. Following is
the format.

echo "<major>:<minor> <rate_io_per_second>" > /cgrp/blkio.write_iops_device
echo "<major>:<minor> <rate_io_per_second>" > /cgrp/blkio.throttle.write_iops_device

Note: If both BW and IOPS rules are specified for a device, then IO is
subjectd to both the constraints.
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