(2014/04/16 18:36), Peter Zijlstra wrote: > On Wed, Apr 16, 2014 at 03:33:06PM +0900, Hidetoshi Seto wrote: >> So we need 2 operations: >> a) remove regression > > What regression; there's never been talk about a regression, just a bug > found. AFAICT this 'regression' is ever since we introduced NOHZ or > somesuch, which is very long ago indeed. > > And since its basically been broken forever, there's no rush what so > ever.
Well, from a customer's view, when he upgrade his foobar enterprise linux from version 5 to 6 (for example), he will say "it's a regression" if something worked well in previous version have broken in new version without any documents and/or technical notes etc. That's why I used the word "regression" for this bug. >> b) implement new iowait accounting mechanism >> >> What Frederic mentioned is that we don't need a) once if we invent >> the solution for b). But I doubt it because a) is still required >> for stable environment including some distributor's kernel. >> It is clear that patches for b) will not be backportable. >> >> Still the b) is disease that has no known cure. There is no reason >> to wait works on b) before starting works for a). > > As stated, there is no a). Its been forever broken. There is no urgency. I just wrote my patches for my customer like above and for my salary ;-) Thank you for your comments! I'll post my v4 patch set soon. Thanks, H.Seto -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
