On Friday 11 June 2010 13:10:57 Andre Renaud wrote:
> >> Has anyone ever looked at using LZO or similar compression within YAFFS
> >> to reduce the amount of data written?
> >
> > This is something we talked about in very early YAFFS days. There are
> > some pros and cons.
> >
> > Pros: Less writes, more stored.
> > Cons: Really bad for any form of overwrite (one of the main reasons
> > JFFS2 does not support memory mapped writing).
> >
> > You can get some of the Pros by storing compressed files (eg. vai loop
> > mounting).
>
> Hi Charles,
> Do you know if this means that UBIFS doesn't support mmap'd IO?

Last time I checked it did not. Whether that is still the case I do not know.

-- Charles