linux-kernel - Re: [PATCH 5/6] udf: implement extent caching while reading-writing to a file

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Message-ID: <CAKYAXd-Mm72cGwAoYd1ZtMFXD8WF2E3u7S23zckhoFA=h+4XhA@mail.gmail.com>
Date:	Wed, 9 Jan 2013 15:26:43 +0900
From:	Namjae Jeon <linkinjeon@...il.com>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-kernel@...r.kernel.org,
	Namjae Jeon <namjae.jeon@...sung.com>,
	Ashish Sangwan <a.sangwan@...sung.com>
Subject: Re: [PATCH 5/6] udf: implement extent caching while reading-writing
 to a file

2012/12/13, Namjae Jeon <linkinjeon@...il.com>:
> 2012/10/19, Namjae Jeon <linkinjeon@...il.com>:
>> 2012/10/19, Jan Kara <jack@...e.cz>:
>>>   Hello,
>>>
>>> On Wed 10-10-12 00:10:01, Namjae Jeon wrote:
>>>> From: Namjae Jeon <namjae.jeon@...sung.com>
>>>>
>>>> This patch implements extent caching.
>>>> Instead of reading metadata everytime from file's starting position,
>>>> now we read from the cached extent.
>>>> This speeds up the transformation of file logical offsets to
>>>> corresponding on-disk blocks.
>>>   I have some mostly minor comments to the patch. But when reading the
>>> extent code it is just ugly and hard to follow. So I'm thinking how to
>>> improve that before making things even harder with the extent cache. So
>>> give me a few more days please.
>> Hi Jan.
>> Okay, I see. Thanks!
>>>
> Hi Jan.
> Sorry for interrupt. I am still waiting for your review.
> Would you check extent cache patches ?
> Thanks.
Hi Jan.

Maybe You think you didn't convince extent cache implementation of
write part in this patch.
So I suggest that once, we add extent cache of read part first in case
of read-only mount type.
because it is real issue on 3D BD-disk playing(BD Disk is used on
read-only mount type).
And I will check more write part again.

Thanks.

>
>>> 								Honza
>
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