linux-kernel - Re: [PATCH] f2fs: fix fdatasync

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Date:   Thu, 17 Nov 2016 09:13:03 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     Christoph Hellwig <hch@...radead.org>
CC:     <jaegeuk@...nel.org>, <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>, <chao@...nel.org>
Subject: Re: [PATCH] f2fs: fix fdatasync

On 2016/11/16 20:15, Christoph Hellwig wrote:
> On Wed, Nov 16, 2016 at 08:12:11PM +0800, Chao Yu wrote:
>> For below two cases, we can't guarantee data consistence:
>>
>> a)
>> 1. xfs_io "pwrite 0 4195328" "fsync"
>> 2. xfs_io "pwrite 4195328 1024" "fdatasync"
>> 3. godown
>> 4. umount & mount
>> --> isize we updated before fdatasync won't be recovered
>>
>> b)
>> 1. xfs_io "pwrite -S 0xcc 0 4202496" "fsync"
>> 2. xfs_io "fpunch 4194304 4096" "fdatasync"
>> 3. godown
>> 4. umount & mount
>> --> dnode we punched before fdatasync won't be recovered
> 
> Can you please add testcases for these to xfstests?

It's OK, will do.

> 
> .
>