Re: Great jffs2 speedup

["hinko.kocevar@cetrtapot.si" <hinko.kocevar@cetrtapot.si>]

Ferenc Havasi wrote:
>>We found sumtool utility in tools dir and if my understanding is
>>correct it is used to convert jffs2 image with no EBS to jffs2 image
>>with EBS.
>>
>>Is this the only way to upgrade 'old' jffs2 partitions already in
>>place (on the nand flash) to use EBS? Thing is, we have several system
>>up and running in the wild and would like to upgrade jffs2 partitions
>>as-painless-as-possible, preferably without complete reflash of the
>>systems.
> 
> 
> At this moment: yes, that is the only way. 

Ok, just to be on the right track. I guess we will have to come up with 
the solution using sumtool.

> 
> Or you may try our other technique: CS (Centralized Summary). That
> technique does not requie user space tool, and cause very fast mount
> after any clean umount.

All of our umounts are unclean - or said better application is not 
taking care of umount at all. System may be powered off anytime. Which 
raises another question: Will this impact mount time in long run? Eg. 
after more and more unclean (u)mounts should we expect significant 
performance degradation?

regards,
hinko