linux-kernel - Re: [PATCH] FAT: use blkdev_issue_flush() instead of congestion

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Date:   Wed, 17 Nov 2021 02:52:21 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     NeilBrown <neilb@...e.de>
Cc:     OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
        linux-kernel@...r.kernel.org, linux-block@...r.kernel.org
Subject: Re: [PATCH] FAT: use blkdev_issue_flush() instead of
 congestion_wait()

On Wed, Nov 17, 2021 at 03:31:34PM +1100, NeilBrown wrote:
> 
> congestion_wait() in this context is just a sleep - block devices do not
> in general support congestion signalling any more.
> 
> The goal here is to wait for any recently written data to get to
> storage.  This can be achieved using blkdev_issue_flush().

This goes back to commit ae78bf9c4f5fde3c67e2829505f195d7347ce3e4
and looking at that this seems to be correct.  It might be worth to
reference that commit, though.

Otherwise looks good:

Reviewed-by: Christoph Hellwig <hch@....de>