linux-kernel - Re: [PATCH] ext4: Fix incorrect group count in ext4_fill

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Message-ID: <20200329164454.GN53396@mit.edu>
Date:   Sun, 29 Mar 2020 12:44:54 -0400
From:   "Theodore Y. Ts'o" <tytso@....edu>
To:     Andreas Dilger <adilger@...ger.ca>
Cc:     Josh Triplett <josh@...htriplett.org>, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Andreas Dilger <adilger.kernel@...ger.ca>
Subject: Re: [PATCH] ext4: Fix incorrect group count in ext4_fill_super error
 message

On Sat, Mar 28, 2020 at 10:36:07PM -0600, Andreas Dilger wrote:
> You missed the v2 patch, which was better IMHO.

I saw the V2 patch, but the it will print the 32-bit truncated block
count, and it's possible if things are really insane, the number of
block groups calculated will be > 2**32.  In which case the V1 patch
with the format string adjusted will print a less confusing message.
e.g.:

groups count too large: 8589934634 ....

as opposed to: 

groups count too large: 42 ....

					- Ted