linux-kernel - Re: [PATCH v5 2/2] tmpfs: Support 64-bit inums per-sb

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Message-ID: <4E9DF932-C46C-4331-B88D-6928D63B8267@fb.com>
Date:   Tue, 7 Jan 2020 21:37:25 +0000
From:   Chris Mason <clm@...com>
To:     Dave Chinner <david@...morbit.com>
CC:     Amir Goldstein <amir73il@...il.com>,
        Hugh Dickins <hughd@...gle.com>,
        Chris Down <chris@...isdown.name>,
        Linux MM <linux-mm@...ck.org>,
        "Andrew Morton" <akpm@...ux-foundation.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Matthew Wilcox <willy@...radead.org>,
        Jeff Layton <jlayton@...nel.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Tejun Heo <tj@...nel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Kernel Team <Kernel-team@...com>
Subject: Re: [PATCH v5 2/2] tmpfs: Support 64-bit inums per-sb

On 7 Jan 2020, at 16:07, Dave Chinner wrote:

> IOWs, there are *lots* of 64bit inode numbers out there on XFS
> filesystems....

It's less likely in btrfs but +1 to all of Dave's comments.  I'm happy 
to run a scan on machines in the fleet and see how many have 64 bit 
inodes (either buttery or x-y), but it's going to be a lot.

-chris