Re: [PATCH v2] erofs: use dedicated meta inodes for file-backed mounts

[Chao Yu <chao@kernel.org>]

On 8/11/26 17:07, Gao Xiang wrote:
> Currently, metadata access for file-backed mounts reuses the page cache
> of backing inodes directly.
> 
> Switch to per-sb dedicated pseudo inodes ("managed cache") for metadata
> access on file-backed mounts (although I still don't think it is
> necessary due to the EROFS immutable model). As the result, metadata
> cache won't use the page cache of backing inodes anymore.
> 
> The "managed cache" was originally used to cache physical compressed
> data according to the current cache strategy and I/O patterns; since
> file-backed mounts also need to access physical data for metadata
> access, it's natural to reuse the managed cache for this too, providing
> a unique inode for all physical data access.
> 
> Signed-off-by: Gao Xiang <xiang@kernel.org>
Reviewed-by: Chao Yu <chao@kernel.org>

Thanks,