Re: [PATCH] f2fs: annotate lockless NAT counter reads

[Chao Yu]

On 5/5/26 20:55, Cen Zhang wrote:
> nat_cnt[] is updated while callers hold nat_tree_lock, but F2FS samples
> the counters locklessly in f2fs_available_free_memory(),
> excess_dirty_nats(), and excess_cached_nats(). Those helpers only steer
> cache reclaim and background sync heuristics; they do not control NAT
> entry lifetime or checkpoint correctness.
>
> Document the intent with data_race(READ_ONCE()) and a short comment
> instead of adding locking to the balance path.
>
> Signed-off-by: Cen Zhang <zzzccc427@xxxxxxxxx>

Reviewed-by: Chao Yu <chao@xxxxxxxxxx>

Thanks,