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DateThu, 26 Apr 2007 02:46:08 -0400 (EDT)
FromDaniel Barkalow <>
SubjectRe: Linux 2.6.21
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On Thu, 26 Apr 2007, Adrian Bunk wrote:

Number of different known regressions compared to 2.6.20 at the time of the 2.6.21 release:
14

I count 13. (v2) had 15 items, of which 2 were subsequently fixed or found to be inapplicable.

Number of different known regressions compared to 2.6.20 at the time of the 2.6.21 release with patches available at the time of the 2.6.21 release [1]:
3

The -stable team can presumably take care of these in 2.6.21.1, right? That leaves 10 that need developer attention.

John Stultz seems to be taking care of 3 of them.

Oliver Neukum has 1.

2 are particular drivers (ali_pata and rtl8139, according to the reports).

2 seem to be ACPI-related; at least one has a candidate patch now.
1 seems to be an ALSA problem.

1 is STD and being debugged.

It looks like all of the known regressions are being worked on, and getting fixes in for them is -stable material at this point. Furthermore, it doesn't look to me like anyone who is needed for dealing with these regressions is trying to get stuff into the 2.6.22 merge window.
I think it's clear that this is the right point for Linus to start the 2.6.22 cycle and leave the rest of the 2.6.21 work to the -stable team, who are the experts of taking care of this sort of stuff. Furthermore, it seems like -rc testers at this point have found everything in 2.6.21-rc they're going to, so, again, it's time for new regressions. Personally, I'd vote for having Linus leave off at 2.6.X-final, and have 2.6.X be the first -stable release of the series, where the remaining known regressions get fixed, but that's an issue of nomenclature, not development process.
I think you've allowed for a well-tested 2.6.21, and a good chance of a 2.6.21.1 or .2 with no known regressions against 2.6.20, which seems to me like you succeeded as far as everything except making Linus a release engineer.

-Daniel
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