commit 99816f4bcf382915d503fb0553a3c2d987a76e67
Author: Yiannis Pericleous <[EMAIL PROTECTED]>
Date: Tue Apr 10 13:51:17 2007 -0400
added the 2 lower thresholds in usage doc
diff --git a/Documentation/filesystems/unionfs/usage.txt
b/Documentation/filesystems/unionfs/usage.txt
index 3cec86f..1a2420f 100644
--- a/Documentation/filesystems/unionfs/usage.txt
+++ b/Documentation/filesystems/unionfs/usage.txt
@@ -114,7 +114,7 @@ possibly stale ODF:
We use configfs to define three global variables for all mounted unions, to
control cache cleaning. The following assumes that you mount configfs in
-/config. We have 3 variables
+/config. We have 5 variables
1. timeout: defaults to 30 seconds. Controls the interval when the ODF
cleanup thread will wake up. You can use configfs to view the value:
@@ -126,14 +126,19 @@ control cache cleaning. The following assumes that you
mount configfs in
# echo 15 > /config/unionfs/timeout
-2. block_thresh: defaults to 80%. The threshold of consumed disk blocks in
+2. block_high_thresh: defaults to 80%. The threshold of consumed disk blocks
in
/odf, above which we begin cleaning, to bring the system below this
- threshold. (Note: we may add a hysteresis functionality to prevent
- ping-pong effects.)
+ threshold.
-3. inode_thresh: defaults to 80%. The threshold of consumed inodes in /odf,
+3. block_low_thresh: defaults to 70%. The threshold of consumed disk blocks in
+ /odf we try to bring the system to after we begin cleaning.
+
+4. inode_high_thresh: defaults to 80%. The threshold of consumed inodes in
/odf,
above which we begin cleaning, to bring the system below this threshold.
+5. inode_low_thresh: defaults to 70%. The threshold of consumed inodes in
/odf,
+ we try to bring the system to after we begin cleaning.
+
You can view or modify the latter two variables similarly to the 'timeout'
variable.
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