@@ -57,12 +57,9 @@ config MTD_UBI_BEB_LIMIT
Leave the default value if unsure.
- bool "UBI Fastmap (Experimental feature)"
+ bool "UBI Fastmap"
- Important: this feature is experimental so far and the on-flash
- format for fastmap may change in the next kernel versions
Fastmap is a mechanism which allows attaching an UBI device
in nearly constant time. Instead of scanning the whole MTD device it
only has to locate a checkpoint (called fastmap) on the device.
@@ -74,6 +71,10 @@ config MTD_UBI_FASTMAP
images are still usable with UBI implementations without
fastmap support. On typical flash devices the whole fastmap fits
into one PEB. UBI will reserve PEBs to hold two fastmaps.
+ Note that this feature makes UBI less robust, since Fastmap does not scan
+ the full flash, which might lead to problems on misbehaving NAND chips.
+ Only enable this if speedup of the attach time is really important
+ and you can be sure that the NAND works as expected.
If in doubt, say "N".