linux-kernel - Re: [f2fs-dev] [PATCH 01/10] f2fs: reassign new segment for mode=lfs

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Date:   Thu, 12 Jan 2017 19:03:05 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     Jaegeuk Kim <jaegeuk@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>,
        <linux-f2fs-devel@...ts.sourceforge.net>
Subject: Re: [f2fs-dev] [PATCH 01/10] f2fs: reassign new segment for mode=lfs

On 2017/1/5 6:48, Jaegeuk Kim wrote:
> On 01/04, Chao Yu wrote:
>> Hi Jaegeuk,
>>
>> On 2016/12/31 2:51, Jaegeuk Kim wrote:
>>> Otherwise we can remain wrong curseg->next_blkoff, resulting in fsck failure.
>>
>> Could you explain more about this case?
> 
> I remember that I hit an fsck failure when I was testing f2fs with an smr drive.
> I didn't dig into the error, but the fact is that our roll-forward recovery
> doesn't update current segment information at every time, but allocate a new
> section at the end of the work like below.
> I just enabled it for the LFS mode in order to avoid that failure.

Alright, thanks for the explanation.

Thanks,

> 
> Thanks,
> 
>>
>> Thanks,
>>
>>>
>>> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
>>> ---
>>>  fs/f2fs/segment.c | 3 ---
>>>  1 file changed, 3 deletions(-)
>>>
>>> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
>>> index be9e4d244d75..4e5ffe1d97e4 100644
>>> --- a/fs/f2fs/segment.c
>>> +++ b/fs/f2fs/segment.c
>>> @@ -1428,9 +1428,6 @@ void allocate_new_segments(struct f2fs_sb_info *sbi)
>>>  	unsigned int old_segno;
>>>  	int i;
>>>  
>>> -	if (test_opt(sbi, LFS))
>>> -		return;
>>> -
>>>  	for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
>>>  		curseg = CURSEG_I(sbi, i);
>>>  		old_segno = curseg->segno;
>>>
> 
> .
>