1. 02 Mar, 2017 1 commit
  2. 08 May, 2015 1 commit
  3. 22 Feb, 2014 1 commit
  4. 09 Feb, 2014 1 commit
  5. 13 Jan, 2014 1 commit
    • Dario Faggioli's avatar
      sched/deadline: Add SCHED_DEADLINE inheritance logic · 2d3d891d
      Dario Faggioli authored
      Some method to deal with rt-mutexes and make sched_dl interact with
      the current PI-coded is needed, raising all but trivial issues, that
      needs (according to us) to be solved with some restructuring of
      the pi-code (i.e., going toward a proxy execution-ish implementation).
      This is under development, in the meanwhile, as a temporary solution,
      what this commits does is:
       - ensure a pi-lock owner with waiters is never throttled down. Instead,
         when it runs out of runtime, it immediately gets replenished and it's
         deadline is postponed;
       - the scheduling parameters (relative deadline and default runtime)
         used for that replenishments --during the whole period it holds the
         pi-lock-- are the ones of the waiting task with earliest deadline.
      Acting this way, we provide some kind of boosting to the lock-owner,
      still by using the existing (actually, slightly modified by the previous
      commit) pi-architecture.
      We would stress the fact that this is only a surely needed, all but
      clean solution to the problem. In the end it's only a way to re-start
      discussion within the community. So, as always, comments, ideas, rants,
      etc.. are welcome! :-)
      Signed-off-by: default avatarDario Faggioli <raistlin@linux.it>
      Signed-off-by: default avatarJuri Lelli <juri.lelli@gmail.com>
      [ Added !RT_MUTEXES build fix. ]
      Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
      Link: http://lkml.kernel.org/r/1383831828-15501-11-git-send-email-juri.lelli@gmail.com
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
  6. 22 Feb, 2013 2 commits
  7. 07 Feb, 2013 1 commit