qtmoko v35

Ed Kapitein ed at kapitein.org
Tue Apr 12 11:10:47 CEST 2011


On Tuesday 12 April 2011 10:34:38 giacomo 'giotti' mariani wrote:
> Hello everyone,
> 
> > [...]
> > 
> >> >  We had problems with ubifs too. Gennady talked to ubifs devs and they
> >> >  would like to see the kernel message and nandump so they could try
> >> >  too look into it.
> >> >  
> >> >  It seems that ubifs is not as stable as jffs2 which was 100% perfect.
> >> >  Only problem is that jffs2 cant do mmap and apt-get does not work
> >> >  without mmap.
> >> >  
> >> >  Jffs2 will never do mmap (according to the main devel it's a lot of
> >> >  complex work because of compression) so we have these options now:
> >> >  
> >> >  * live with bugged ubifs
> >> >  * patch apt-get so that it works without mmap
> >> >  * use the old trick with /var/cache/apt on tmpfs, but this has
> >> >  problems with limited memory and bigger upates/upgrades might not
> >> >  work * use some other flash filesystem - yaffs seems but does not
> >> >  support compression, i havent looked at logfs yet
> >> >  
> >> >  So any suggestions?
> > 
> > We could use jffs2 if we link /var/cache/apt to a tiny partition on SD.
> > Then while SD is in huge updates will work, if SD is removed ->  no apt,
> > but still a runing system.
> 
> In my opinion ubifs is a great improvement: it looks faster than jffs2
> and less memory consumer than jffs2.
> It should be used, if possible. So I suggest to use it and to send
> kernel messages and nandump to ubifs guys in order to help them.
> 
> And that's what I'm doing ;-)
> 
> Cheers
>      Giacomo

Perhaps just a crazy idea: make a loopback file with a ext2/3 fs and mount that 
on  /var/cache/apt ?

Kind regards,
Ed



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