Re: [PATCH] generic/563: allow read tolerance for f2fs in scenario 3

On 5/15/2026 4:26 PM, Jan Prusakowski wrote:
> F2FS is a log-structured file system that allocates new blocks even for
> overwrites. To perform allocation, it may need to read metadata blocks
> (such as the Node Address Table (NAT) or Segment Info Table (SIT)) if
> they are not already in memory.
> 
> In scenario 3 (read -> read/write), unlike scenario 2, there is no prior
> write in the same mount session to load these metadata blocks into memory.
> Therefore, the write operation in the second cgroup triggers metadata
> reads, which are charged to that cgroup.
> 
> Relax the read tolerance for f2fs in scenario 3 to accommodate these
> expected metadata reads, matching the tolerance already used in scenario 2.
> 
> Signed-off-by: Jan Prusakowski <[email protected]>

Reviewed-by: Chao Yu <[email protected]>

Thanks,