Messages in this thread | | | Date | Wed, 16 Aug 2023 16:56:44 +0700 | From | Bagas Sanjaya <> | Subject | Fwd: ubi: fastmap: Fix a series of wear leveling problems |
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Hi,
I notice a bug report with proposed fixes on Bugzilla [1]. Quoting from it (only the first problem that is quoted):
> Problem 1: large erase counter for single fastmap data PEB > > Config: > x86_64 qemu > flash: nandsim > CONFIG_MTD_UBI_WL_THRESHOLD=128 > CONFIG_MTD_UBI_FASTMAP=y > ubi->beb_rsvd_pebs=0 > > Running fsstress on ubifs for 3h(fastmap data PEB has large erase counter than others): > ========================================================= > from to count min avg max > --------------------------------------------------------- > 0 .. 9: 0 0 0 0 > 10 .. 99: 532 84 92 99 > 100 .. 999: 15787 100 147 229 > 1000 .. 9999: 64 4699 4765 4826 > 10000 .. 99999: 0 0 0 0 > 100000 .. inf: 1 272935 272935 272935 > --------------------------------------------------------- > Total : 16384 84 180 272935 > PEB 8031(ec=272935) is always taken for fastmap data. > > After fix, running fsstress on ubifs for 12h(no pool reservation), no individual peb has big erase counter: > ========================================================= > from to count min avg max > --------------------------------------------------------- > 0 .. 9: 0 0 0 0 > 10 .. 99: 0 0 0 0 > 100 .. 999: 16320 609 642 705 > 1000 .. 9999: 0 0 0 0 > 10000 .. 99999: 64 18176 18234 18303 > 100000 .. inf: 0 0 0 0 > --------------------------------------------------------- > Total : 16384 609 710 18303
See Bugzilla for the full thread (with other problems mentioned) and attached patch series that fixes them.
Zhihao: I asked you on BZ to send your patches to linux-mtd list, but you didn't respond there. Would you like to send them for review?
Thanks.
[1]: https://bugzilla.kernel.org/show_bug.cgi?id=217787
-- An old man doll... just what I always wanted! - Clara
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