linux-kernel - Re: [PATCH] erofs: move erofs out of staging

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Date:   Sun, 18 Aug 2019 06:07:07 +0800
From:   Gao Xiang <hsiangkao@....com>
To:     Richard Weinberger <richard@....at>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        devel@...verdev.osuosl.org, linux-erofs@...ts.ozlabs.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>, tytso <tytso@....edu>,
        Pavel Machek <pavel@...x.de>, David Sterba <dsterba@...e.cz>,
        Amir Goldstein <amir73il@...il.com>,
        Christoph Hellwig <hch@...radead.org>,
        "Darrick J . Wong" <darrick.wong@...cle.com>,
        Dave Chinner <david@...morbit.com>,
        Jaegeuk Kim <jaegeuk@...nel.org>, Jan Kara <jack@...e.cz>,
        torvalds <torvalds@...ux-foundation.org>,
        Chao Yu <yuchao0@...wei.com>, Miao Xie <miaoxie@...wei.com>,
        Li Guifu <bluce.liguifu@...wei.com>,
        Fang Wei <fangwei1@...wei.com>,
        Gao Xiang <gaoxiang25@...wei.com>
Subject: Re: [PATCH] erofs: move erofs out of staging

Hi Richard,

On Sat, Aug 17, 2019 at 11:19:50PM +0200, Richard Weinberger wrote:
> ----- Urspr?ngliche Mail -----
> > Von: "Gao Xiang" <hsiangkao@....com>
> > An: "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>, "Al Viro" <viro@...iv.linux.org.uk>, "linux-fsdevel"
> > <linux-fsdevel@...r.kernel.org>, devel@...verdev.osuosl.org, linux-erofs@...ts.ozlabs.org, "linux-kernel"
> > <linux-kernel@...r.kernel.org>
> > CC: "Andrew Morton" <akpm@...ux-foundation.org>, "Stephen Rothwell" <sfr@...b.auug.org.au>, "tytso" <tytso@....edu>,
> > "Pavel Machek" <pavel@...x.de>, "David Sterba" <dsterba@...e.cz>, "Amir Goldstein" <amir73il@...il.com>, "Christoph
> > Hellwig" <hch@...radead.org>, "Darrick J . Wong" <darrick.wong@...cle.com>, "Dave Chinner" <david@...morbit.com>,
> > "Jaegeuk Kim" <jaegeuk@...nel.org>, "Jan Kara" <jack@...e.cz>, "richard" <richard@....at>, "torvalds"
> > <torvalds@...ux-foundation.org>, "Chao Yu" <yuchao0@...wei.com>, "Miao Xie" <miaoxie@...wei.com>, "Li Guifu"
> > <bluce.liguifu@...wei.com>, "Fang Wei" <fangwei1@...wei.com>, "Gao Xiang" <gaoxiang25@...wei.com>
> > Gesendet: Samstag, 17. August 2019 10:23:13
> > Betreff: [PATCH] erofs: move erofs out of staging
> 
> > EROFS filesystem has been merged into linux-staging for a year.
> > 
> > EROFS is designed to be a better solution of saving extra storage
> > space with guaranteed end-to-end performance for read-only files
> > with the help of reduced metadata, fixed-sized output compression
> > and decompression inplace technologies.
>  
> How does erofs compare to squashfs?
> IIUC it is designed to be faster. Do you have numbers?
> Feel free to point me older mails if you already showed numbers,
> I have to admit I didn't follow the development very closely.

You can see the following related material which has microbenchmark
tested on my laptop:
https://static.sched.com/hosted_files/kccncosschn19eng/19/EROFS%20file%20system_OSS2019_Final.pdf

which was mentioned in the related topic as well:
https://lore.kernel.org/r/20190815044155.88483-1-gaoxiang25@huawei.com/

Thanks,
Gao Xiang

> 
> Thanks,
> //richard