Re: [f2fs-dev] [PATCH 1/2 v2] f2fs: don't get FREEZE lock in f2fs_evict_inode in frozen fs

[Chao Yu]

On 2022/3/11 13:22, Jaegeuk Kim wrote:
> Let's purge inode cache in order to avoid the below deadlock.
>
> [freeze test]                         shrinkder
> freeze_super
>   - pwercpu_down_write(SB_FREEZE_FS)
>                                         - super_cache_scan
>                                           - down_read(&sb->s_umount)
>                                             - prune_icache_sb
>                                              - dispose_list
>                                               - evict
>                                                - f2fs_evict_inode
> thaw_super
>   - down_write(&sb->s_umount);
>                                                - __percpu_down_read(SB_FREEZE_FS)
>
> Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>

Reviewed-by: Chao Yu <chao@xxxxxxxxxx>

Thanks,