mm: bdi: allow setting a minimum for the bdi dirty limit

[linux-2.6-omap-h63xx.git] / Documentation / ABI / testing / sysfs-class-bdi

diff --git a/Documentation/ABI/testing/sysfs-class-bdi b/Documentation/ABI/testing/sysfs-class-bdi
index b800cdda40bb7b66434cf09abd766942cad28835..b9e8a9368dc6b40a0ee3c97851bbfdd13134ea89 100644 (file)
--- a/Documentation/ABI/testing/sysfs-class-bdi
+++ b/Documentation/ABI/testing/sysfs-class-bdi
@@ -44,3 +44,9 @@ bdi_dirty_kb (read-only)
        Current threshold on this BDI for reclaimable + writeback
        memory
 
+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