linux-kernel - Re: [RFC NO MERGE] f2fs: extent cache: support unaligned extent

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Date:   Tue, 3 Aug 2021 09:07:22 +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: [RFC NO MERGE] f2fs: extent cache: support unaligned extent

On 2021/8/3 2:03, Jaegeuk Kim wrote:
> On 08/01, Chao Yu wrote:
>> On 2021/7/31 3:20, Jaegeuk Kim wrote:
>>> On 07/07, Chao Yu wrote:
>>>> Currently, it only works in readonly format f2fs image.
>>
>> There wouldn't be any race condition because unaligned extent only works
>> for ro feature now?
> 
> Isn't your patch proposing on writable partition?

Please check description in patch message, now it was designed only for
compression case w/ ro feature, let's check and support rw partition later.

Thanks,

> 
>>
>>> Is there any race condition between the address in extent_cache and the one in
>>> dnode? I feel that we could synchronize it by locking its dnode block.
>>
>> Thanks,