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Date:   Fri, 16 Sep 2022 12:37:57 -0600
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To:     Yu Kuai <yukuai1@huaweicloud.com>, song@kernel.org,
        guoqing.jiang@linux.dev, pmenzel@molgen.mpg.de
Cc:     linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org,
        yukuai3@huawei.com, yi.zhang@huawei.com
References: <20220916113428.774061-1-yukuai1@huaweicloud.com>
 <20220916113428.774061-6-yukuai1@huaweicloud.com>
From:   Logan Gunthorpe <logang@deltatee.com>
In-Reply-To: <20220916113428.774061-6-yukuai1@huaweicloud.com>
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Subject: Re: [PATCH v3 5/5] md/raid10: convert resync_lock to use seqlock
Precedence: bulk


On 2022-09-16 05:34, Yu Kuai wrote:
> From: Yu Kuai <yukuai3@huawei.com>
> 
> Currently, wait_barrier() will hold 'resync_lock' to read 'conf->barrier',
> and io can't be dispatched until 'barrier' is dropped.
> 
> Since holding the 'barrier' is not common, convert 'resync_lock' to use
> seqlock so that holding lock can be avoided in fast path.
> 
> Signed-off-by: Yu Kuai <yukuai3@huawei.com>

Reviewed-and-Tested-by: Logan Gunthorpe <logang@deltatee.com>

So far, I've run this series 3 times through the mdadm test suite and
haven't detected any issues.

Thanks,

Logan