Overview
This option allows zoned block device users to configure GC reserved and
overprovision area manually according to their demands on performance of
sustained write latency and WAF.
Problem
===
The overprovision segments that mkfs generates are mostly occupied by GC
reserved.
>On 03/14, Yonggil Song wrote:
>> When f2fs tries to checkpoint during foreground gc in LFS mode, system
>> crash occurs due to lack of free space if the amount of dirty node and
>> dentry pages generated by data migration exceeds free space.
>> The reproduction sequence is as follows.
>>
>> - 20
On 03/14, Yonggil Song wrote:
> When f2fs tries to checkpoint during foreground gc in LFS mode, system
> crash occurs due to lack of free space if the amount of dirty node and
> dentry pages generated by data migration exceeds free space.
> The reproduction sequence is as follows.
>
> - 20GiB cap
BUG_ON() will be triggered when writing files concurrently,
because the same page is writtenback multiple times.
1597 void folio_end_writeback(struct folio *folio)
1598 {
..
1618 if (!__folio_end_writeback(folio))
1619 BUG();
..
1625 }
kernel BU
From: liyangtao <11127...@bbktel.com>
BUG_ON() will be triggered when writing files concurrently,
because the same page is writtenback multiple times.
1597 void folio_end_writeback(struct folio *folio)
1598 {
..
1618 if (!__folio_end_writeback(folio))
1619 BUG();
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