From 54de1f1c44c3522dbdc2201be1f65e733526de51 Mon Sep 17 00:00:00 2001 From: Richard Genoud Date: Fri, 29 Jun 2012 08:57:41 +0200 Subject: UBI: Change the default percentage of reserved PEB The actual value (1%) is too low for actual NAND devices, a huge majority of device has 2% maximum bad blocks (SLC or MLC). (Actually it's 20 blocks on a 1024 blocks device, 40/2048...) Signed-off-by: Richard Genoud --- drivers/mtd/ubi/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/mtd') diff --git a/drivers/mtd/ubi/Kconfig b/drivers/mtd/ubi/Kconfig index 738ee8dc16cd..ea4b95b5451c 100644 --- a/drivers/mtd/ubi/Kconfig +++ b/drivers/mtd/ubi/Kconfig @@ -29,7 +29,7 @@ config MTD_UBI_WL_THRESHOLD config MTD_UBI_BEB_RESERVE int "Percentage of reserved eraseblocks for bad eraseblocks handling" - default 1 + default 2 range 0 25 help If the MTD device admits of bad eraseblocks (e.g. NAND flash), UBI -- cgit v1.2.3 From 2ce7be1b777d4f06c5b28a397cf85d9beb1bca0e Mon Sep 17 00:00:00 2001 From: Peter Meerwald Date: Mon, 2 Jul 2012 23:38:17 +0200 Subject: UBI: fix spelling of detach in debug output Signed-off-by: Peter Meerwald Signed-off-by: Artem Bityutskiy --- drivers/mtd/ubi/cdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/mtd') diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c index acec85deb6af..fb5567878181 100644 --- a/drivers/mtd/ubi/cdev.c +++ b/drivers/mtd/ubi/cdev.c @@ -1026,7 +1026,7 @@ static long ctrl_cdev_ioctl(struct file *file, unsigned int cmd, { int ubi_num; - dbg_gen("dettach MTD device"); + dbg_gen("detach MTD device"); err = get_user(ubi_num, (__user int32_t *)argp); if (err) { err = -EFAULT; -- cgit v1.2.3 From 5c669a5bd8c0f0567127128990d01f9ae320a9ef Mon Sep 17 00:00:00 2001 From: Shmulik Ladkani Date: Wed, 4 Jul 2012 11:06:03 +0300 Subject: UBI: trivial: fix comment of ubi_calculate_reserved function The function name within the comment was not aligned with the actual function name. Signed-off-by: Shmulik Ladkani Signed-off-by: Artem Bityutskiy --- drivers/mtd/ubi/misc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/mtd') diff --git a/drivers/mtd/ubi/misc.c b/drivers/mtd/ubi/misc.c index f6a7d7ac4b98..b57134d1bdee 100644 --- a/drivers/mtd/ubi/misc.c +++ b/drivers/mtd/ubi/misc.c @@ -92,7 +92,7 @@ int ubi_check_volume(struct ubi_device *ubi, int vol_id) } /** - * ubi_calculate_rsvd_pool - calculate how many PEBs must be reserved for bad + * ubi_calculate_reserved - calculate how many PEBs must be reserved for bad * eraseblock handling. * @ubi: UBI device description object */ -- cgit v1.2.3 From 87e773c95eb0b363f2efcc7aff8a347dc18925d0 Mon Sep 17 00:00:00 2001 From: Shmulik Ladkani Date: Wed, 4 Jul 2012 11:06:04 +0300 Subject: UBI: harmonize the update of ubi->beb_rsvd_pebs Currently, there are several locations where an attempt to reserve more PEBs for bad PEB handling is made, with the same code being duplicated. Harmonize it by introducing 'ubi_update_reserved()'. Also, improve the debug message issued, making it more descriptive. Artem: amended the patch a little. Signed-off-by: Shmulik Ladkani Signed-off-by: Artem Bityutskiy --- drivers/mtd/ubi/misc.c | 23 +++++++++++++++++++++++ drivers/mtd/ubi/ubi.h | 1 + drivers/mtd/ubi/vmt.c | 20 ++------------------ 3 files changed, 26 insertions(+), 18 deletions(-) (limited to 'drivers/mtd') diff --git a/drivers/mtd/ubi/misc.c b/drivers/mtd/ubi/misc.c index b57134d1bdee..8bbfb444b895 100644 --- a/drivers/mtd/ubi/misc.c +++ b/drivers/mtd/ubi/misc.c @@ -91,6 +91,29 @@ int ubi_check_volume(struct ubi_device *ubi, int vol_id) return err; } +/** + * ubi_update_reserved - update bad eraseblock handling accounting data. + * @ubi: UBI device description object + * + * This function calculates the gap between current number of PEBs reserved for + * bad eraseblock handling and the required level of PEBs that must be + * reserved, and if necessary, reserves more PEBs to fill that gap, according + * to availability. Should be called with ubi->volumes_lock held. + */ +void ubi_update_reserved(struct ubi_device *ubi) +{ + int need = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs; + + if (need <= 0 || ubi->avail_pebs == 0) + return; + + need = min_t(int, need, ubi->avail_pebs); + ubi->avail_pebs -= need; + ubi->rsvd_pebs += need; + ubi->beb_rsvd_pebs += need; + ubi_msg("reserved more %d PEBs for bad PEB handling", need); +} + /** * ubi_calculate_reserved - calculate how many PEBs must be reserved for bad * eraseblock handling. diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h index a1a81c9ea8ce..84f66e3fa05d 100644 --- a/drivers/mtd/ubi/ubi.h +++ b/drivers/mtd/ubi/ubi.h @@ -647,6 +647,7 @@ int ubi_more_leb_change_data(struct ubi_device *ubi, struct ubi_volume *vol, int ubi_calc_data_len(const struct ubi_device *ubi, const void *buf, int length); int ubi_check_volume(struct ubi_device *ubi, int vol_id); +void ubi_update_reserved(struct ubi_device *ubi); void ubi_calculate_reserved(struct ubi_device *ubi); int ubi_check_pattern(const void *buf, uint8_t patt, int size); diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c index 0669cff8ac3c..9169e58c262e 100644 --- a/drivers/mtd/ubi/vmt.c +++ b/drivers/mtd/ubi/vmt.c @@ -443,15 +443,7 @@ int ubi_remove_volume(struct ubi_volume_desc *desc, int no_vtbl) spin_lock(&ubi->volumes_lock); ubi->rsvd_pebs -= reserved_pebs; ubi->avail_pebs += reserved_pebs; - i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs; - if (i > 0) { - i = ubi->avail_pebs >= i ? i : ubi->avail_pebs; - ubi->avail_pebs -= i; - ubi->rsvd_pebs += i; - ubi->beb_rsvd_pebs += i; - if (i > 0) - ubi_msg("reserve more %d PEBs", i); - } + ubi_update_reserved(ubi); ubi->vol_count -= 1; spin_unlock(&ubi->volumes_lock); @@ -558,15 +550,7 @@ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs) spin_lock(&ubi->volumes_lock); ubi->rsvd_pebs += pebs; ubi->avail_pebs -= pebs; - pebs = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs; - if (pebs > 0) { - pebs = ubi->avail_pebs >= pebs ? pebs : ubi->avail_pebs; - ubi->avail_pebs -= pebs; - ubi->rsvd_pebs += pebs; - ubi->beb_rsvd_pebs += pebs; - if (pebs > 0) - ubi_msg("reserve more %d PEBs", pebs); - } + ubi_update_reserved(ubi); for (i = 0; i < reserved_pebs; i++) new_mapping[i] = vol->eba_tbl[i]; kfree(vol->eba_tbl); -- cgit v1.2.3