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Date:   Tue, 20 Aug 2019 20:51:04 -0400
From:   "Theodore Y. Ts'o" <tytso@mit.edu>
To:     Gao Xiang <hsiangkao@aol.com>
Cc:     Chao Yu <yuchao0@huawei.com>, Qu Wenruo <quwenruo.btrfs@gmx.com>,
        "Darrick J. Wong" <darrick.wong@oracle.com>,
        Christoph Hellwig <hch@infradead.org>,
        Eric Biggers <ebiggers@kernel.org>,
        Richard Weinberger <richard@nod.at>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jan Kara <jack@suse.cz>, Dave Chinner <david@fromorbit.com>,
        David Sterba <dsterba@suse.cz>, Miao Xie <miaoxie@huawei.com>,
        devel <devel@driverdev.osuosl.org>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        Amir Goldstein <amir73il@gmail.com>,
        linux-erofs <linux-erofs@lists.ozlabs.org>,
        Al Viro <viro@zeniv.linux.org.uk>,
        Jaegeuk Kim <jaegeuk@kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Li Guifu <bluce.liguifu@huawei.com>,
        Fang Wei <fangwei1@huawei.com>, Pavel Machek <pavel@denx.de>,
        linux-fsdevel <linux-fsdevel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH] erofs: move erofs out of staging
Message-ID: <20190821005104.GF10232@mit.edu>
Mail-Followup-To: "Theodore Y. Ts'o" <tytso@mit.edu>,
        Gao Xiang <hsiangkao@aol.com>, Chao Yu <yuchao0@huawei.com>,
        Qu Wenruo <quwenruo.btrfs@gmx.com>,
        "Darrick J. Wong" <darrick.wong@oracle.com>,
        Christoph Hellwig <hch@infradead.org>,
        Eric Biggers <ebiggers@kernel.org>,
        Richard Weinberger <richard@nod.at>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jan Kara <jack@suse.cz>, Dave Chinner <david@fromorbit.com>,
        David Sterba <dsterba@suse.cz>, Miao Xie <miaoxie@huawei.com>,
        devel <devel@driverdev.osuosl.org>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        Amir Goldstein <amir73il@gmail.com>,
        linux-erofs <linux-erofs@lists.ozlabs.org>,
        Al Viro <viro@zeniv.linux.org.uk>, Jaegeuk Kim <jaegeuk@kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Li Guifu <bluce.liguifu@huawei.com>, Fang Wei <fangwei1@huawei.com>,
        Pavel Machek <pavel@denx.de>,
        linux-fsdevel <linux-fsdevel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        torvalds <torvalds@linux-foundation.org>
References: <20190818172938.GA14413@sol.localdomain>
 <20190818174702.GA17633@infradead.org>
 <20190818181654.GA1617@hsiangkao-HP-ZHAN-66-Pro-G1>
 <20190818201405.GA27398@hsiangkao-HP-ZHAN-66-Pro-G1>
 <20190819160923.GG15198@magnolia>
 <20190819203051.GA10075@hsiangkao-HP-ZHAN-66-Pro-G1>
 <bdb91cbf-985b-5a2c-6019-560b79739431@gmx.com>
 <ad62636f-ef1b-739f-42cc-28d9d7ed86da@huawei.com>
 <20190820155623.GA10232@mit.edu>
 <20190820163504.GA7780@hsiangkao-HP-ZHAN-66-Pro-G1>
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On Wed, Aug 21, 2019 at 12:35:08AM +0800, Gao Xiang wrote:
> 
> For EROFS, it's a special case since it is a RO fs, and erofs mkfs
> will generate reproducable images (which means, for one dir trees,
> it only generates exact one result except for build time).

Agreed, and given that, doing the fuzzing in your mkfs tool makes
perfect sense.  I wasn't surprised at all that you chose that path.

Cheers,

						- Ted