linux-kernel - Re: [f2fs-dev] [RFC v3] f2fs: extent cache: support unaligned extent

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Message-ID: <8f8a2aad-a201-01d2-eb31-06289421d6ec@kernel.org>
Date:   Thu, 5 Aug 2021 11:14:56 +0800
From:   Chao Yu <chao@...nel.org>
To:     Jaegeuk Kim <jaegeuk@...nel.org>
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Chao Yu <chao.yu@...ux.dev>
Subject: Re: [f2fs-dev] [RFC v3] f2fs: extent cache: support unaligned extent

On 2021/8/5 11:04, Chao Yu wrote:
> On 2021/8/5 10:53, Jaegeuk Kim wrote:
>> On 08/05, Chao Yu wrote:
>>> Jaegeuk,
>>>
>>> On 2021/8/5 7:45, Jaegeuk Kim wrote:
>>>> Chao,
>>>>
>>>> How about this?
>>>> https://github.com/jaegeuk/f2fs/commit/d6bbe121bc24dfabfedc07ba7cb6e921fb70ece0
>>>
>>> Looks more clean, thanks,
>>>
>>>>
>>>> I'm digging one bug in __insert_extent_tree w/ the patch tho.
>>>
>>> Shouldn't we initialize @ei in f2fs_update_extent_tree_range(), otherwise,
>>> __try_merge_extent_node(&ei) -> __is_extent_mergeable() will do the check
>>> w/ uninitialized c_len of @ei.
>>
>> Fixed some bugs, but still getting another data corruption.

You mean data readed indexed by extent cache is inconsistent with the on-disk one,
right?

Thanks,

>>
>> https://github.com/jaegeuk/f2fs/commit/c5d97919c55b467392407b60c1a7b1e3e81721ff
> 
> Let me rebase to your code, and do some tests.
> 
> Thanks
> 
>>
>>>
>>>>> On 08/04, Chao Yu wrote:
>>>>>> +	if (from_dnode)
>>>>>> +		goto skip_reading_dnode;
>>>
>>> Wrong condition here, thanks for fixing.
>>>
>>> Thanks,
> 
> 
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