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Date: Wed, 7 Mar 2018 00:08:46 -0500
From: "Theodore Y. Ts'o" <tytso@mit.edu>
To: rong zhao <zhaorbox@gmail.com>
Cc: linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: resize2fs hang at read function
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On Wed, Mar 07, 2018 at 11:01:40AM +0800, rong zhao wrote:
> 
> I downloaded the latest e2fsprogs source code from kernel.org, it works.

I'm not sure what the difference is, but I'm *shocked* that RHEL 7.4
is still using e2fsprogs 1.42.x.  There are a very large number of
resize2fs bugs, especially with very large file systems, with
e2fsprogs 1.42.x.  Especially in the case of off-line resizes with a
lage ext4 file system, with a resize2fs from e2fsprogs 1.42.x, data
corruption is almost a certainty.

If you have used resize2fs 1.42.x on that file system, I would suggest
running e2fsck on your large ext4 file system unmounted when you have
a chance, to make sure it's in a good and healthy state.

Regards,

					- Ted