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

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Message-ID: <0dad9863-4aa2-3ea3-fd97-457aa635ed66@kernel.org>
Date:   Thu, 5 Aug 2021 08:29:46 +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

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.

>> On 08/04, Chao Yu wrote:
>>> +	if (from_dnode)
>>> +		goto skip_reading_dnode;

Wrong condition here, thanks for fixing.

Thanks,