[RFC] slight UBI scan time improvement

[Hamish Moffatt]

On Tue, Apr 22, 2008 at 07:42:32PM +0300, Artem Bityutskiy wrote:
> Hi,
> 
> I've prepared 2 UBI patches which may slightly improve the scan time. I
> am not sure though. Would you guys please try them and tell if UBI scan
> time changed? Thanks in advance.

Hi Artem,

Thanks for your patch.. unfortunately I don't see a significant
difference, although it is slightly faster.

Before:

[    0.950000] NAND device: Manufacturer ID: 0xec, Chip ID: 0xdc (Samsung NAND 512MiB 3,3V 8-bit)
[    0.960000] Scanning device for bad blocks
[    1.000000] Bad eraseblock 494 at 0x03dc0000
[    1.050000] Bad eraseblock 1300 at 0x0a280000
[    1.140000] Bad eraseblock 2554 at 0x13f40000
[    1.160000] Bad eraseblock 2923 at 0x16d60000
[    1.200000] Bad eraseblock 3349 at 0x1a2a0000
[    1.230000] Bad eraseblock 3790 at 0x1d9c0000
[    6.900000] UBI: attached mtd9 to ubi0

After:

[    0.950000] NAND device: Manufacturer ID: 0xec, Chip ID: 0xdc (Samsung NAND 512MiB 3,3V 8-bit)
[    0.960000] Scanning device for bad blocks
[    1.000000] Bad eraseblock 494 at 0x03dc0000
[    1.050000] Bad eraseblock 1300 at 0x0a280000
[    1.140000] Bad eraseblock 2554 at 0x13f40000
[    1.160000] Bad eraseblock 2923 at 0x16d60000
[    1.200000] Bad eraseblock 3349 at 0x1a2a0000
[    1.230000] Bad eraseblock 3790 at 0x1d9c0000
[    6.890000] UBI: attached mtd9 to ubi0



Hamish
-- 
Hamish Moffatt VK3SB <hamish at debian.org> <hamish at cloud.net.au>