On 2/19/07, Mark Mitchell <[EMAIL PROTECTED]> wrote:
Daniel Berlin wrote:
>> 2. What is the effort required to backport the necessary infrastructure
>> from 4.3? I'm not looking for "a lot" or "is hard", but rather, "two
>> weeks" or "six months". What needs to be backported, and what are the
>> challenges?
>
> Including bug fixes, i'd guess 2 months to be conservative.
OK, thanks. That seems like a lot of effort; certainly more than I
could try to browbeat you into doing. :-)
A lot of this is also that we are still shaking out performance
regressions that are a combination of fixes and changes for mem-ssa.
We'd still have to do that if we backported the 4.3 changes.
There are less of them, for sure, than there are in 4.2, but they are
still there.
> There are no real challenges other than applying the patches and doing
> a lot of testing, since most of these patches were written pretty
> early on during the 4.3 cycle.
Is there anyone brave enough to volunteer to try?
If this were to turn
out to be substantially easier than Danny thinks, then it sounds like it
might be a good solution. However, there's no reason to expect that,
and I think two person-months is rather much.
If things go perfect, it would take probably 2 weeks.
We could start by reverting the patch and applying the fixes until you
are happy, if that would be better?
If you stopped before the end you will end up with the freefem3d
memory regression, but nothing more.
Therefore, it sounds like the practical choices are revert the patch and
accept the bugs, or vice versa. Is there any reason to expect the bugs
to be particularly more prevalent in 4.2 than they were in 4.1?
Nope.
