linux-kernel - Re: [PATCH v2 1/2] md/raid5: freeze reshape when encountering a bad read

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Message-ID: <9d878dea7b1afa2472f8f583fd116e31@dougvj.net>
Date: Tue, 18 Feb 2025 07:20:01 +0000
From: Doug V Johnson <dougvj@...gvj.net>
To: Yu Kuai <yukuai1@...weicloud.com>
Cc: Doug Johnson <dougvj@...il.com>, Song Liu <song@...nel.org>, "open
 list:SOFTWARE RAID (Multiple Disks) SUPPORT" <linux-raid@...r.kernel.org>,
 open list <linux-kernel@...r.kernel.org>, "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH v2 1/2] md/raid5: freeze reshape when encountering a bad
 read

> Perhaps, check badblocks before starting reshape in the first place can
> solve most problems in this case? We can keep this patch just in case
> new badblocks are set while performing reshape.
> 
> Thanks,
> Kuai
> 
This is a really good idea and should mitigate the risk of getting into 
these weird states. I started work on a patch that seems to work, I will 
submit it after I have done some testing.

Thanks for your feedback,
Doug