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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2008-04-30 00:54:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:50 -0700 |
| commit | a42dde04152750426cc620fd277e80fffae2f65a (patch) | |
| tree | 98cdf246280c59e0bf044ae6d2c229fc27b73203 /Documentation/ABI | |
| parent | 189d3c4a94ef19fca2a71a6a336e9fda900e25e7 (diff) | |
| download | lwn-a42dde04152750426cc620fd277e80fffae2f65a.tar.gz lwn-a42dde04152750426cc620fd277e80fffae2f65a.zip | |
mm: bdi: allow setting a maximum for the bdi dirty limit
Add "max_ratio" to /sys/class/bdi. This indicates the maximum percentage of
the global dirty threshold allocated to this bdi.
[mszeredi@suse.cz]
- fix parsing in max_ratio_store().
- export bdi_set_max_ratio() to modules
- limit bdi_dirty with bdi->max_ratio
- document new sysfs attribute
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-bdi | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-bdi b/Documentation/ABI/testing/sysfs-class-bdi index b9e8a9368dc6..c55e811ca180 100644 --- a/Documentation/ABI/testing/sysfs-class-bdi +++ b/Documentation/ABI/testing/sysfs-class-bdi @@ -49,4 +49,11 @@ min_ratio (read-write) Minimal percentage of global dirty threshold allocated to this bdi. If the value written to this file would make the the sum of all min_ratio values exceed 100, then EINVAL is returned. - The default is zero + If min_ratio would become larger than the current max_ratio, + then also EINVAL is returned. The default is zero + +max_ratio (read-write) + + Maximal percentage of global dirty threshold allocated to this + bdi. If max_ratio would become smaller than the current + min_ratio, then EINVAL is returned. The default is 100 |