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Date:   Wed, 9 Dec 2020 17:51:21 +0000
From:   Christoph Hellwig <hch@infradead.org>
To:     Tom Yan <tom.ty89@gmail.com>
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Subject: Re: [PATCH 1/3] block: try one write zeroes request before going
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On Tue, Dec 08, 2020 at 08:48:15PM +0800, Tom Yan wrote:
> You mean like submit_bio_wait() is a blocking operation?

Yes, it blocks to wait for the I/O to complete.