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UBI: improve Kconfig documentation

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Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Artem Bityutskiy 2008-03-27 17:18:45 +02:00
parent c4506092c1
commit 6e0c84e37e
1 changed files with 7 additions and 2 deletions
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9
drivers/mtd/ubi/Kconfig
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@ -24,8 +24,13 @@ config MTD_UBI_WL_THRESHOLD
erase counter value and the lowest erase counter value of eraseblocks
of UBI devices. When this threshold is exceeded, UBI starts performing
wear leveling by means of moving data from eraseblock with low erase
counter to eraseblocks with high erase counter. Leave the default
value if unsure.
counter to eraseblocks with high erase counter.
The default value should be OK for SLC NAND flashes, NOR flashes and
other flashes which have eraseblock life-cycle 100000 or more.
However, in case of MLC NAND flashes which typically have eraseblock
life-cycle less then 10000, the threshold should be lessened (e.g.,
to 128 or 256, although it does not have to be power of 2).
config MTD_UBI_BEB_RESERVE
int "Percentage of reserved eraseblocks for bad eraseblocks handling"