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

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Message-ID: <62eb8902-90fa-4b1a-55ce-a178643baf90@kernel.org>
Date:   Thu, 5 Aug 2021 11:04:21 +0800
From:   Chao Yu <chao@...nel.org>
To:     Jaegeuk Kim <jaegeuk@...nel.org>
Cc:     Chao Yu <chao.yu@...ux.dev>, linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [RFC v3] f2fs: extent cache: support unaligned extent

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.
> 
> 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,