On Tue, 2014-11-25 at 00:35 +0100, Thomas Gleixner wrote: > Aside of the general issues I have with this (see the inline replies > to your changelog) the overall impression of this patch is that it is > a half baken and carelessly cobbled together extract of some data base > specific kernel hackery, which I prefer not to see at all. It culminates in a lumbering pseudo RT class of task disguised as a fair class task. I'd expect more gain by twiddling knobs to let last buddy do its job than the 3% mentioned. You could perhaps create a SUPER_BATCH class that is not wakeup preempted by any fair class task of <= priority, not only BATCH and IDLE, but that's as nasty as this patch, though loads prettier. The tick time thing doesn't feel right at all... if you're hurt badly by the tick, you're likely holding the lock too long methinks. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
