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Date:   Sun, 18 Aug 2019 06:07:07 +0800
From:   Gao Xiang <hsiangkao@aol.com>
To:     Richard Weinberger <richard@nod.at>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Al Viro <viro@zeniv.linux.org.uk>,
        linux-fsdevel <linux-fsdevel@vger.kernel.org>,
        devel@driverdev.osuosl.org, linux-erofs@lists.ozlabs.org,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Stephen Rothwell <sfr@canb.auug.org.au>, tytso <tytso@mit.edu>,
        Pavel Machek <pavel@denx.de>, David Sterba <dsterba@suse.cz>,
        Amir Goldstein <amir73il@gmail.com>,
        Christoph Hellwig <hch@infradead.org>,
        "Darrick J . Wong" <darrick.wong@oracle.com>,
        Dave Chinner <david@fromorbit.com>,
        Jaegeuk Kim <jaegeuk@kernel.org>, Jan Kara <jack@suse.cz>,
        torvalds <torvalds@linux-foundation.org>,
        Chao Yu <yuchao0@huawei.com>, Miao Xie <miaoxie@huawei.com>,
        Li Guifu <bluce.liguifu@huawei.com>,
        Fang Wei <fangwei1@huawei.com>,
        Gao Xiang <gaoxiang25@huawei.com>
Subject: Re: [PATCH] erofs: move erofs out of staging
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Hi Richard,

On Sat, Aug 17, 2019 at 11:19:50PM +0200, Richard Weinberger wrote:
> ----- Urspr?ngliche Mail -----
> > Von: "Gao Xiang" <hsiangkao@aol.com>
> > An: "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>, "Al Viro" <viro@zeniv.linux.org.uk>, "linux-fsdevel"
> > <linux-fsdevel@vger.kernel.org>, devel@driverdev.osuosl.org, linux-erofs@lists.ozlabs.org, "linux-kernel"
> > <linux-kernel@vger.kernel.org>
> > CC: "Andrew Morton" <akpm@linux-foundation.org>, "Stephen Rothwell" <sfr@canb.auug.org.au>, "tytso" <tytso@mit.edu>,
> > "Pavel Machek" <pavel@denx.de>, "David Sterba" <dsterba@suse.cz>, "Amir Goldstein" <amir73il@gmail.com>, "Christoph
> > Hellwig" <hch@infradead.org>, "Darrick J . Wong" <darrick.wong@oracle.com>, "Dave Chinner" <david@fromorbit.com>,
> > "Jaegeuk Kim" <jaegeuk@kernel.org>, "Jan Kara" <jack@suse.cz>, "richard" <richard@nod.at>, "torvalds"
> > <torvalds@linux-foundation.org>, "Chao Yu" <yuchao0@huawei.com>, "Miao Xie" <miaoxie@huawei.com>, "Li Guifu"
> > <bluce.liguifu@huawei.com>, "Fang Wei" <fangwei1@huawei.com>, "Gao Xiang" <gaoxiang25@huawei.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