Re: UBI fastmap updates

Richard Weinberger
2012-08-17T13:43:37Z

Am Fri, 17 Aug 2012 16:41:24 +0300
schrieb Artem Bityutskiy <artem.bityutskiy@linux.intel.com>:

> On Fri, 2012-08-17 at 15:33 +0200, Richard Weinberger wrote:
> > Am Fri, 17 Aug 2012 16:11:55 +0300
> > schrieb Artem Bityutskiy <artem.bityutskiy@linux.intel.com>:
> > > We do not do anything like this in UBI because UBI does not need
> > > this, it does not have any complex data structures on the media.
> > >
> > > With fastmap - I am unsure. I think it is not a problem, because
> > > probably you never append more data, you just re-write everything,
> > > right?
> >
> > Yep, the on-flash fastmap is immutable.
>
> Here the question is - if you have PEB containing fastmap data,
> half-filled. Will you ever add more data there to the empty space in
> the PEB or not?
>

No, data is never added to a half-filled PEB.
Fastmap does not share PEBs with other sub-systems by design.

Thanks,
//richard