Document the amount of memory used by the stripe cache and the fact that
it's tied down and unavailable for other purposes (right?). thanks to Dan
Williams for the formula.
-dean
Signed-off-by: dean gaudet <dean@xxxxxxxxxx>
Index: linux/Documentation/md.txt
===================================================================
--- linux.orig/Documentation/md.txt 2007-12-29 13:01:25.000000000 -0800
+++ linux/Documentation/md.txt 2007-12-29 13:04:17.000000000 -0800
@@ -438,5 +438,11 @@
stripe_cache_size (currently raid5 only)
number of entries in the stripe cache. This is writable, but
there are upper and lower limits (32768, 16). Default is 128.
+
+ The stripe cache memory is locked down and not available for other uses.
+ The total size of the stripe cache is determined by this formula:
+
+ PAGE_SIZE * raid_disks * stripe_cache_size
+
strip_cache_active (currently raid5 only)
number of active entries in the stripe cache
-
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