Re: [PATCH 2/2] mkfs.f2fs: make the default extensions list much more sensical

[Chao Yu <yuchao0@huawei.com>]

On 2019/4/16 14:43, Park Ju Hyung wrote:
> Following extensions are removed:
>  - divx: deprecated video format and it's usually wrapped with avi
>  - asf: deprecated streaming format
>  - asx: redirecting file to asf(small)
>  - wmx: redirecting file to wma/wmv(small)
>  - rm: deprecated media container
>  - video: unused
>  - wv: unpopular audio format from 1998
> 
> The extensions list is limited to 64 and those don't deserve to be
> on this space-precious list.
> 
> Common prefixes are introduced and are checked with
> https://en.wikipedia.org/wiki/List_of_filename_extensions
> to avoid treating possible hot files as cold:
>  - mp: covers mp3, mp4, mpeg, mpg
>  - wm: covers wma, wmb, wmv
>  - og: covers oga, ogg, ogm, ogv
>  - jp: covers jpg, jpeg, jp2
> 
> Following extensions are added:
>  - webm: extremely popular free media container format from Google
>          VP8/VP9/AV1 and Vorbis/Opus is often wrapped with this container
>  - wav: uncompressed audio format, commonly used with voice recorders
>  - svg: vector image format commonly used in web
>  - webp: free lossy image format commonly used in web
>  - jar: Java archive file
>  - deb: Debian software package
>  - iso: disk image file
>  - gz: gzip compressed file, unable to randomly update
>  - xz: xz compressed file, unable to randomly update
>  - zst: zstd compressed file, unable to randomly update
>  - pdf: PDF document
>  - pyc: Python bytecode automatically generated when
>         executing python to run .py files
>  - ttc, ttf: font files
>  - cnt: image alias files commonly used in Android apps
>  - exo: EXO player's cache files, commonly used in Android's YouTube app
>  - odex, vdex: Android RunTime files found in /data/app/*/oat
> 
> Total entries on the list changed from 34 to 36.
> 
> Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>

Reviewed-by: Chao Yu <yuchao0@huawei.com>

Thanks,