diff options
| author | Shmulik Ladkani <shmulik.ladkani@gmail.com> | 2012-07-04 11:06:00 +0300 |
|---|---|---|
| committer | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2012-09-04 09:38:58 +0300 |
| commit | 8beeb3bb9df8caba36ad3e4f226255dff9c92556 (patch) | |
| tree | 4758809d39183d7aaccaa8178c5d5150c2bf1a9d /drivers/mtd/ubi/Kconfig | |
| parent | afe7d12b6d997ff8ceff02e405eae9ba54aa8350 (diff) | |
UBI: introduce new bad PEB limit
Introduce 'ubi->bad_peb_limit', which specifies an upper limit of PEBs
UBI expects to go bad. Currently, it is initialized to a fixed percentage
of total PEBs in the UBI device (configurable via CONFIG_MTD_UBI_BEB_LIMIT).
The 'bad_peb_limit' is intended to be used for calculating the amount of PEBs
UBI needs to reserve for bad eraseblock handling.
Artem: minor amendments.
Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
Diffstat (limited to 'drivers/mtd/ubi/Kconfig')
| -rw-r--r-- | drivers/mtd/ubi/Kconfig | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/drivers/mtd/ubi/Kconfig b/drivers/mtd/ubi/Kconfig index ea4b95b5451..76195ac90e5 100644 --- a/drivers/mtd/ubi/Kconfig +++ b/drivers/mtd/ubi/Kconfig @@ -34,13 +34,25 @@ config MTD_UBI_BEB_RESERVE help If the MTD device admits of bad eraseblocks (e.g. NAND flash), UBI reserves some amount of physical eraseblocks to handle new bad - eraseblocks. For example, if a flash physical eraseblock becomes bad, - UBI uses these reserved physical eraseblocks to relocate the bad one. - This option specifies how many physical eraseblocks will be reserved - for bad eraseblock handling (percents of total number of good flash - eraseblocks). If the underlying flash does not admit of bad - eraseblocks (e.g. NOR flash), this value is ignored and nothing is - reserved. Leave the default value if unsure. + eraseblocks. When a physical eraseblock becomes bad, UBI uses these + reserved physical eraseblocks to relocate the bad one. This + configuration option specifies how many physical eraseblocks will be + reserved for bad eraseblock handling (percents of total number of + good physical eraseblocks on this MTD partition). If the underlying + flash does not admit of bad eraseblocks (e.g. NOR flash), this value + is ignored and nothing is reserved. Leave the default value if + unsure. + +config MTD_UBI_BEB_LIMIT + int "Percentage of maximum expected bad eraseblocks" + default 2 + range 0 25 + help + This option specifies the maximum bad physical eraseblocks UBI + expects on the UBI device (percents of total number of physical + eraseblocks on this MTD partition). If the underlying flash does not + admit of bad eraseblocks (e.g. NOR flash), this value is ignored. + Leave the default value if unsure. config MTD_UBI_GLUEBI tristate "MTD devices emulation driver (gluebi)" |