Messages in this thread | | | Subject | Re: Fwd: ubi: fastmap: Fix a series of wear leveling problems | From | Zhihao Cheng <> | Date | Wed, 16 Aug 2023 19:08:04 +0800 |
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在 2023/8/16 17:56, Bagas Sanjaya 写道: Hi, > 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? >
Sorry for the delayed response. Yes, I have sent the fix patches in https://patchwork.ozlabs.org/project/linux-mtd/list/?series=368534. Any suggestions are welcomed.
> Thanks. > > [1]: https://bugzilla.kernel.org/show_bug.cgi?id=217787 >
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