linux-ext4 - Re: [PATCH 23/28] mbcache: make mbcache more generic

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Date:   Thu, 15 Jun 2017 11:25:02 -0700
From:   Tahsin Erdogan <tahsin@...gle.com>
To:     Jan Kara <jack@...e.cz>
Cc:     Jan Kara <jack@...e.com>, "Theodore Ts'o" <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Dave Kleikamp <shaggy@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Mark Fasheh <mfasheh@...sity.com>,
        Joel Becker <jlbec@...lplan.org>, Jens Axboe <axboe@...com>,
        Deepa Dinamani <deepa.kernel@...il.com>,
        Mike Christie <mchristi@...hat.com>,
        Fabian Frederick <fabf@...net.be>, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org, jfs-discussion@...ts.sourceforge.net,
        linux-fsdevel@...r.kernel.org, ocfs2-devel@....oracle.com,
        reiserfs-devel@...r.kernel.org
Subject: Re: [PATCH 23/28] mbcache: make mbcache more generic

On Thu, Jun 15, 2017 at 12:41 AM, Jan Kara <jack@...e.cz> wrote:
> Can you explain a bit more what do you mean by "make it more generic" as it
> seems you just rename a couple of things here...

The change is really just that, having names that are more generic
which do not limit use cases to block sharing. In a subsequent patch
in the series ("[PATCH v4 27/28] ext4: xattr inode deduplication"), we
start using the mbcache code to share xattr inodes. With that patch,
old mb_cache_entry.e_block field could be holding either a block
number or an inode number, so I renamed things to make them more
generic.