linux-kernel - Re: [PATCH 2/2] f2fs: don't skip recovering inode depend on i

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Date:   Fri, 4 Nov 2016 15:53:52 -0700
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     Chao Yu <yuchao0@...wei.com>
Cc:     Chao Yu <chao@...nel.org>, linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, liushuoran@...wei.com
Subject: Re: [PATCH 2/2] f2fs: don't skip recovering inode depend on i_times

On Fri, Nov 04, 2016 at 04:30:09PM +0800, Chao Yu wrote:
> On 2016/11/4 2:02, Jaegeuk Kim wrote:
> > On Fri, Nov 04, 2016 at 12:26:56AM +0800, Chao Yu wrote:
> >> From: Chao Yu <yuchao0@...wei.com>
> >>
> >> i_times of inode will be set with current system time which can be
> >> configured through 'date', so it's not safe to judge dnode block as
> >> garbage data depend on i_times.
> > 
> > This is not to detect garbage data, but to skip redundant unchanged inode.
> 
> Oops, seems 807b1e1c8e08 ("f2fs: do not recover from previous remained wrong
> dnodes") did't describe like that. But after reading the codes, it looks like
> the purpose of this change is to skip unchanged inode. So, commit log in
> original is incorrect, right?

Oh, right. This indicats both of purposes: stale data and detecting same inodes.
Let me just revert the original patch.

Thanks,

> 
> Thanks,