linux-kernel - Re: [f2fs-dev] [PATCH 5/5] f2fs: avoid out-of-order execution of atomic writes

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Message-ID: <a3d6d263-1b37-0d67-b8da-603f9f50548c@huawei.com>
Date:   Thu, 23 Feb 2017 17:22:46 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     Jaegeuk Kim <jaegeuk@...nel.org>, <linux-kernel@...r.kernel.org>,
        <linux-fsdevel@...r.kernel.org>,
        <linux-f2fs-devel@...ts.sourceforge.net>
Subject: Re: [f2fs-dev] [PATCH 5/5] f2fs: avoid out-of-order execution of
 atomic writes

On 2017/2/4 7:48, Jaegeuk Kim wrote:
> We need to flush data writes before flushing last node block writes by using
> FUA with PREFLUSH. We don't need to guarantee precedent node writes since if
> those are not written, we can't reach to the last node block when scanning
> node block chain during roll-forward recovery.
> Afterwards f2fs_wait_on_page_writeback guarantees all the IO submission to
> disk, which builds a valid node block chain.
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>

Reviewed-by: Chao Yu <yuchao0@...wei.com>