MTD Flash Partition: change possible?

[Arno Steffen]

2010/8/23 Artem Bityutskiy <dedekind1 at gmail.com>:
> On Mon, 2010-08-23 at 14:11 +0200, Arno Steffen wrote:
>> 2010/8/23 Artem Bityutskiy <dedekind1 at gmail.com>:
>> > On Mon, 2010-08-23 at 12:23 +0200, Arno Steffen wrote:
>> >> In my embedded system the Flash-partition table is compiled into kernel.
>> >> Is there a way to change partition table without booting a new kernel? How?
>> >>
>> >> Background: I want to update an embedded system and change the size of
>> >> partitions. But tools as flash_eraseall and nandwrite use partitions
>> >> of the current kernel. If I want to change the size of the partitions,
>> >> this is impossible.
>> >> If I first flash a new kernel with new partition table, I have to
>> >> reboot and the system will not start, as the old partitioning scheme
>> >> is still active.
>> >
>> > There were at least 2 patches. One from Nokia - it was ok, but a small
>> > change was requested and the author disappeared. One was from Samsung -
>> > I did not look at it so far. The patches were sent to the MTD mailing
>> > list a month or 2 ago.
>> >
>> > --
>> > Best Regards,
>> > Artem Bityutskiy (Артём Битюцкий)
>> >
>> >
>>
>> Spasibo, Artem.
>>
>> I found the Nokia Patch
>> http://lists.infradead.org/pipermail/linux-mtd/2010-June/030645.html
>> This seems to be done for OneNand, while I am using Nand.
>
> No, it is not OneNAND-specific!
>
>> Regarding the pathes: That are requests to change, so it is not for
>> sure that this is implemented in a new kernel?
>>
>> I found this as an update to mtdutils.
>> http://lists.infradead.org/pipermail/linux-mtd/2010-July/031200.html
>>  Does this needs a new kernel to support this functions? I am using a 2.6.33.
>
> Dunno, did not look at this.
>
>> Reading this, I think there is no solution for my current system.
>> Is there a way to show the startaddress of a partition? /proc/mtd
>> shows just size, not start address.
>
> I do not think we can change /proc/mtd, but isn't it easy to calculate
> the start address using partition sizes?
>
> --
> Best Regards,
> Artem Bityutskiy (Артём Битюцкий)
>
>

If I check the git for mtd-utils, this pathes seems not to be
inserted. Do I have to patch manually?
http://git.infradead.org/mtd-utils.git

Calculating the address might work, but hasn't to be. It is not
forbidden to have "holes" in the partition table.