make /dev/kmem a config option

[linux-2.6-omap-h63xx.git] / Documentation / md.txt

diff --git a/Documentation/md.txt b/Documentation/md.txt
index 396cdd982c26505ee39a577a64a7fb2c7472985e..a8b430627473aa243995ab6f6e173b9cf1ff819e 100644 (file)
--- a/Documentation/md.txt
+++ b/Documentation/md.txt
@@ -450,3 +450,9 @@ These currently include
       there are upper and lower limits (32768, 16).  Default is 128.
   strip_cache_active (currently raid5 only)
       number of active entries in the stripe cache
+  preread_bypass_threshold (currently raid5 only)
+      number of times a stripe requiring preread will be bypassed by
+      a stripe that does not require preread.  For fairness defaults
+      to 1.  Setting this to 0 disables bypass accounting and
+      requires preread stripes to wait until all full-width stripe-
+      writes are complete.  Valid values are 0 to stripe_cache_size.