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Date: Wed, 9 Sep 2026 08:30:29 +0200
From: Christoph Hellwig <hch@lst.de>
To: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: Jack Wang <jinpu.wang@ionos.com>, Nilay Shroff <nilay@linux.ibm.com>,
	abd.masalkhi@gmail.com, linux-raid <linux-raid@vger.kernel.org>,
	linux-block <linux-block@vger.kernel.org>,
	Song Liu <song@kernel.org>, Jens Axboe <axboe@kernel.dk>,
	Christoph Hellwig <hch@lst.de>, Damien Le Moal <dlemoal@kernel.org>,
	Yu Kuai <yukuai@fygo.io>, tom.leiming@gmail.com,
	Jack Wang <jinpu.wang@cloud.ionos.com>
Subject: Re: [PATCH 0/6] md: don't wait for q->limits_lock while md holds
 back I/O
Message-ID: <20260909063029.GC29874@lst.de>
References: <20260907133929.1081540-1-jinpu.wang@ionos.com> <f95804a4-c5ed-498f-b24d-107b2f00d858@wdc.com>
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On Tue, Sep 08, 2026 at 07:00:55PM +0200, Johannes Thumshirn wrote:
>>    for i in $(seq 20); do
>>        mdadm /dev/md111 --fail /dev/ram0
>>        mdadm /dev/md111 --remove /dev/ram0
>>        mdadm /dev/md111 --add /dev/ram0
>>        mdadm --wait /dev/md111
>>    done
>
> This sounds like something that is worth a blktest, isn't it?

Yes.  Or the mdadm testsuite, although that one drіves me crazy.
Migrating those tests to blktests might be a nice little side
project.