Question regarding detail in dropping support for kernels < 2.6.22 (related to Re: POLL: for/against dropping support for kernels < 2.6.22)

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Hello Hans,

Hans Verkuil schrieb:
We still need to support kernels from 2.6.22 onwards. Although I think the
minimum supported kernel is something that needs a regular sanity check,
right now there are no technical reasons that I am aware of to go to
something newer than 2.6.22.

Whether we keep our current system or not is a separate discussion:
whatever development system you choose there will be work involved in
keeping up the backwards compatibility.

Just out of deep interesst:

Could you, Hans (or anyone else) just explain, what is / are the reason to draw the line between kernels 2.6.21 and 2.6.22?

What was the fundamental change there and do these changes as such apply to every supported device / driver?

As I understand you, although you drop backport efforts for kernels below 2.6.22, you are going to adopt an policy to - in a sense - waste development efforts / time on seven instead of 12 kernels?

Wouldn't it then not be more logical to support only the recent kernel and the kernel before, becaus in some month time 2.6.30 might include a major change which would force you to drop support for < 2.6.29 altogether?

Thanks for your patience and reply,

best regards, Tobias

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