Re: [PATCH] Add quick erase format option

[Richard Weinberger]

On Mon, Aug 9, 2010 at 10:52 AM, Stefani Seibold <stefani@xxxxxxxxxxx> wrote:
> Am Montag, den 09.08.2010, 09:37 +0100 schrieb David Woodhouse:
>> On Mon, 2010-08-09 at 09:25 +0100, stefani@xxxxxxxxxxx wrote:
>> > From: Stefani Seibold <stefani@xxxxxxxxxxx>
>> >
>> > This patch add a quick format option which skips erasing of already erased
>> > flash blocks. This is useful for first time production environments where
>> > the flash arrived erased.
>> >
>> > Signed-off-by: Stefani Seibold <stefani@xxxxxxxxxxx>
>>
>> This scares me, given the lengths we had to go to in JFFS2 to cope with
>> blocks which *look* like they're erased, but which actually start losing
>> data as soon as you start writing to them because the erase didn't
>> complete.
>>
>
> I know the drawback. This is why it is only an option which must be
> enabled. And in most use cases there is a subsequent ubimkvol, which
> will fail if the flash is not correct initialized.
>
> Flash are normally delivered erased. So this save in our production
> environment (Nokia Siemens Networks) about 5 minutes per device (256 MB
> NOR CFI Flash).
>
> The old JFFS2 was very fast to install the first time on a flash, it was
> only a simple mount of the MTD partition.
>
> Which the quick format option i have now only a slightly first time
> installation overhead compared to JFFS2. Without this option the
> overhead is more than 5 minutes.

This mail arrived now?!
David, was it delayed by mailman for 8 years?

-- 
Thanks,
//richard