diff --git a/lustre/kernel_patches/patches/i_filter_data.patch b/lustre/kernel_patches/patches/i_filter_data.patch
index 8a21a9e6c5692443bdd0f11d78839484ed712127..663b5f8fd16be46232e270fe63aabd51cd41d639 100644
--- a/lustre/kernel_patches/patches/i_filter_data.patch
+++ b/lustre/kernel_patches/patches/i_filter_data.patch
@@ -1,3 +1,7 @@
+The i_filterdata is currently only used by the size-on-mds to store the
+epoch number for the inode.  This could be moved to another field in
+ldiskfs or elsewhere in the inode that isn't used by Lustre callers.
+
 Index: linux-2.6.18.8/include/linux/fs.h
 ===================================================================
 --- linux-2.6.18.8.orig/include/linux/fs.h	2007-06-05 12:55:19.000000000 +0200
diff --git a/lustre/kernel_patches/patches/sd_iostats-2.6.22-vanilla.patch b/lustre/kernel_patches/patches/sd_iostats-2.6.22-vanilla.patch
index 9e822d27ca9e0f2849dfa53c651ae99e15602972..48f392a52ed831d09dc7135809b7d1a8c7694612 100644
--- a/lustre/kernel_patches/patches/sd_iostats-2.6.22-vanilla.patch
+++ b/lustre/kernel_patches/patches/sd_iostats-2.6.22-vanilla.patch
@@ -1,3 +1,7 @@
+Export more statistics from the SCSI layer.
+
+A nice to have patch, but not required for Lustre to work.
+
 Index: linux-2.6.22.19/drivers/scsi/Kconfig
 ===================================================================
 --- linux-2.6.22.19.orig/drivers/scsi/Kconfig