Hi, On 09/19/2014 11:22 AM, Juri Lelli wrote: > When a task is using SCHED_DEADLINE and the user setschedules it to a > different > class its sched_dl_entity static parameters are not cleaned up. This causes a > bug if the user sets it back to SCHED_DEADLINE with the same parameters again. > The problem resides in the check we perform at the very beginning of > dl_overflow(): > > if (new_bw == p->dl.dl_bw) > return 0; > > This condition is met in the case depicted above, so the function returns and > dl_b->total_bw is not updated (the p->dl.dl_bw is not added to it). After > this, > admission control is broken. > > This patch fixes the thing, properly clearing static parameters for a task > that ceases to use SCHED_DEADLINE. > > Reported-by: Daniele Alessandrelli <daniele.alessandre...@gmail.com> > Reported-by: Daniel Wagner <daniel.wag...@bmw-carit.de>
Tested-by: Daniel Wagner <daniel.wag...@bmw-carit.de> Fixes my problem. Thanks, Daniel -- 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/
