I will drop in this post to put some final remarks...
Wolfgang Denk wrote:
In message 444F74B1.8060909@imagemap.com you wrote:
Just my uninformed opinion...It seems to me that calling saveenv twice is misleading. What I mean is that I assume that I have a "golden" copy of my environment in the redundant area. I should be able to call
No. That "golden" copy is what we call "default environment" - you get this when you lose your environment (with redundand environment it means that you lose both copies).
Yet, the default environment normally does not contain such important stuff like ethaddr which is assigned per board.
saveenv as many times as I wish without touching the contents of the "golden" copy and that there should be another mechanism to update the "golden" copy. I had no idea that calling saveenv twice will overwrite
That's not how redundance is defined. You are looking for a backup copy, which is provided by the default environment.
Indeed redundancy of environment in U-Boot is rather different than I am accustomed to.
Anyway, at least I understand how this stuff works much better now and I hope this discussion will probably help other developers understand that what they might be getting with redundant environment right now might not be exactly what they think they are getting.
I really hoped you would allow to introduce the choice of functionality. It would break no existing boards. I have to think about maintaining an out-of-three patch for this case :(
Best regards, Tolunay