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Date:   Thu, 31 Jan 2019 16:07:04 +0800
From:   Xiaoguang Wang <xiaoguang.wang@...ux.alibaba.com>
To:     linux-ext4@...r.kernel.org
Subject: question about ext4 backup block group descriptors

hi,

Anyone can help answer when ext4's backup block group descriptors are updated?
I had used blktrace to track the corresponding backup block group descriptor
block, but didn't find that any backup blocks were written.
Thanks in advance.

Regards,
Xiaoguang Wang

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