linux-kernel - Re: [PATCH 2/6] UBI: Fastmap: Don't allocate new ubi_wl

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Message-ID: <548571CA.90803@nod.at>
Date:	Mon, 08 Dec 2014 10:39:22 +0100
From:	Richard Weinberger <richard@....at>
To:	Tanya Brokhman <tlinder@...eaurora.org>, dedekind1@...il.com
CC:	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/6] UBI: Fastmap: Don't allocate new ubi_wl_entry objects

Am 08.12.2014 um 10:37 schrieb Tanya Brokhman:
> On 12/8/2014 11:14 AM, Richard Weinberger wrote:
>> Am 08.12.2014 um 09:36 schrieb Tanya Brokhman:
>>> On 11/30/2014 1:35 PM, Richard Weinberger wrote:
>>>> There is no need to allocate new ones every time, we can reuse
>>>> the existing ones.
>>>> This makes the code cleaner and more easy to follow.
>>>>
>>>> Signed-off-by: Richard Weinberger <richard@....at>
>>>> ---
>>>>    drivers/mtd/ubi/fastmap.c | 31 +++++--------------------------
>>>>    drivers/mtd/ubi/wl.c      | 11 +++++++----
>>>>    2 files changed, 12 insertions(+), 30 deletions(-)
>>>>
>>>> diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c
>>>> index db3defd..9507702 100644
>>>> --- a/drivers/mtd/ubi/fastmap.c
>>>> +++ b/drivers/mtd/ubi/fastmap.c
>>>> @@ -1446,19 +1446,6 @@ int ubi_update_fastmap(struct ubi_device *ubi)
>>>>        }
>>>>
>>>>        new_fm->used_blocks = ubi->fm_size / ubi->leb_size;
>>>
>>> Not related to this patch, but looking at this function it got me thinking: why do we need to re-calculate new_fm->used_blocks (and check calculated value) each time? fm_size
>>> doesn't changed at runtime. leb_size sure does not, so fm->used_blocks can be ubi device parameter and calculated & tested only once, and not each time we write fastmap. Correct?
>>
>> If you dig deeper into the patch set you'll notice that the fastmap size can change. :-)
>>
> 
> oh, ok. sorry, still in the middle of the review.

This is perfectly fine.
I really a appreciate your reviews!

Thanks,
//richard
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