lkml.org 
[lkml]   [2023]   [Aug]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: Fwd: ubi: fastmap: Fix a series of wear leveling problems
From
Date
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
>

\
 
 \ /
  Last update: 2023-08-16 13:09    [W:0.028 / U:1.456 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site