ubi: fastmap: Use free pebs reserved for bad block handling

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If new bad PEBs occur, UBI firstly consumes ubi->beb_rsvd_pebs, and then
ubi->avail_pebs, finally UBI becomes read-only if above two items are 0,
which means that the amount of PEBs for user volumes is not effected.
Besides, UBI reserves count of free PBEs is ubi->beb_rsvd_pebs while
filling wl pool or getting free PEBs, but ubi->avail_pebs is not reserved.
So ubi->beb_rsvd_pebs and ubi->avail_pebs have nothing to do with the
usage of free PEBs, UBI can use all free PEBs.

Commit 78d6d497a6 ("UBI: Move fastmap specific functions out of wl.c")
has removed beb_rsvd_pebs checking while filling pool. Now, don't reserve
ubi->beb_rsvd_pebs while filling wl_pool. This will fill more PEBs in pool
and also reduce fastmap updating frequency.

Also remove beb_rsvd_pebs checking in ubi_wl_get_fm_peb.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=217787
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

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This commit is contained in:

Zhihao Cheng 2023-08-28 14:38:38 +08:00 • committed by Richard Weinberger

parent c19286d70a

commit 8ff4e620ac

1 changed files with 5 additions and 11 deletions

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16

drivers/mtd/ubi/fastmap-wl.c

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