linux-kernel - Re: [PATCH 0/2] block: avoid to drop & re-add partitions if partitions aren't changed

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Message-ID: <20210217071629.GA15362@lst.de>
Date:   Wed, 17 Feb 2021 08:16:29 +0100
From:   Christoph Hellwig <hch@....de>
To:     Ming Lei <ming.lei@...hat.com>
Cc:     Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Ewan D . Milne" <emilne@...hat.com>
Subject: Re: [PATCH 0/2] block: avoid to drop & re-add partitions if
 partitions aren't changed

On Wed, Feb 17, 2021 at 11:07:14AM +0800, Ming Lei wrote:
> Do you think it is correct for ioctl(BLKRRPART) to always drop/re-add
> partition device node?

Yes, that is what it is designed to do.  The only reason to call this
ioctl is when userspace software has written new partition table
information to the disk.