linux-ext4 - Re: [PATCH V2 2/4] ext4: cleanup pagecache before swap i

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Message-ID: <20190211051217.GK23000@mit.edu>
Date:   Mon, 11 Feb 2019 00:12:17 -0500
From:   "Theodore Y. Ts'o" <tytso@....edu>
To:     yangerkun <yangerkun@...wei.com>
CC:     <jack@...e.com>, <miaoxie@...wei.com>, <yi.zhang@...wei.com>,
        <houtao1@...wei.com>, <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH V2 2/4] ext4: cleanup pagecache before swap i_data

On Tue, Jan 22, 2019 at 02:58:21PM +0800, yangerkun wrote:
> While do swap, we should make sure there has no new dirty page since we
> should swap i_data between two inode:
> 1.We should locki i_mmap_sem with write to avoid new pagecache from mmap
> read/write;
> 2.Change filemap_flush to filemap_write_and_wait and move them to the
> space protected by inode lock to avoid new pagecache from buffer read/write.
> 
> Signed-off-by: yangerkun <yangerkun@...wei.com>

Thanks, applied.

					- Ted