Messages in this thread Patch in this message | | | Date | Fri, 6 Sep 2019 10:36:16 +0100 | From | Juri Lelli <> | Subject | Re: [RFC][PATCH 12/13] sched/deadline: Introduce deadline servers |
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Hi,
On 30/08/19 13:24, Peter Zijlstra wrote: > On Thu, Aug 08, 2019 at 11:45:46AM +0200, Juri Lelli wrote: > > I'd like to take this last sentence back, I was able to run a few boot + > > hackbench + shutdown cycles with the following applied (guess too much > > debug printks around before). > > I've changed that slightly; the merged delta looks like:
It looks like I had to further apply what follows on top of your latest wip-deadline branch (d3138279c7f3) to make kvm boot.
--->8--- kernel/fork.c | 2 ++ kernel/sched/core.c | 3 +-- 2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/kernel/fork.c b/kernel/fork.c index 2852d0e76ea3..4f404fe1d9ab 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1983,6 +1983,8 @@ static __latent_entropy struct task_struct *copy_process( p->sequential_io_avg = 0; #endif + p->server = NULL; + /* Perform scheduler related setup. Assign this task to a CPU. */ retval = sched_fork(clone_flags, p); if (retval) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 1fd2a8c68daf..d72579b93a9f 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3917,8 +3917,7 @@ pick_next_task(struct rq *rq, struct task_struct *prev, struct rq_flags *rf) * This is the fast path; it cannot be a DL server pick; * therefore even if @p == @prev, ->server must be NULL. */ - if (prev->server) - p->server = NULL; + p->server = NULL; return p; }
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