lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-Id: <1445709662-17232-1-git-send-email-ohaugan@codeaurora.org> Date: Sat, 24 Oct 2015 11:01:02 -0700 From: Olav Haugan <ohaugan@...eaurora.org> To: mingo@...hat.com, peterz@...radead.org Cc: linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org, Olav Haugan <ohaugan@...eaurora.org> Subject: [PATCH] sched: Update task->on_rq when tasks are moving between runqueues Task->on_rq has three states: 0 - Task is not on runqueue (rq) 1 (TASK_ON_RQ_QUEUED) - Task is on rq 2 (TASK_ON_RQ_MIGRATING) - Task is on rq but in the process of being migrated to another rq When a task is moving between rqs task->on_rq state should be TASK_ON_RQ_MIGRATING Signed-off-by: Olav Haugan <ohaugan@...eaurora.org> --- kernel/sched/core.c | 2 ++ kernel/sched/deadline.c | 4 ++++ kernel/sched/rt.c | 4 ++++ 3 files changed, 10 insertions(+) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 10a8faa..5c7b614 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -1309,7 +1309,9 @@ static void __migrate_swap_task(struct task_struct *p, int cpu) dst_rq = cpu_rq(cpu); deactivate_task(src_rq, p, 0); + p->on_rq = TASK_ON_RQ_MIGRATING; set_task_cpu(p, cpu); + p->on_rq = TASK_ON_RQ_QUEUED; activate_task(dst_rq, p, 0); check_preempt_curr(dst_rq, p, 0); } else { diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index fc8f010..21297d7 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -1547,7 +1547,9 @@ retry: } deactivate_task(rq, next_task, 0); + next_task->on_rq = TASK_ON_RQ_MIGRATING; set_task_cpu(next_task, later_rq->cpu); + next_task->on_rq = TASK_ON_RQ_QUEUED; activate_task(later_rq, next_task, 0); ret = 1; @@ -1635,7 +1637,9 @@ static void pull_dl_task(struct rq *this_rq) resched = true; deactivate_task(src_rq, p, 0); + p->on_rq = TASK_ON_RQ_MIGRATING; set_task_cpu(p, this_cpu); + p->on_rq = TASK_ON_RQ_QUEUED; activate_task(this_rq, p, 0); dmin = p->dl.deadline; diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index d2ea593..0735040 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -1790,7 +1790,9 @@ retry: } deactivate_task(rq, next_task, 0); + next_task->on_rq = TASK_ON_RQ_MIGRATING; set_task_cpu(next_task, lowest_rq->cpu); + next_task->on_rq = TASK_ON_RQ_QUEUED; activate_task(lowest_rq, next_task, 0); ret = 1; @@ -2044,7 +2046,9 @@ static void pull_rt_task(struct rq *this_rq) resched = true; deactivate_task(src_rq, p, 0); + p->on_rq = TASK_ON_RQ_MIGRATING; set_task_cpu(p, this_cpu); + p->on_rq = TASK_ON_RQ_QUEUED; activate_task(this_rq, p, 0); /* * We continue with the search, just in -- 2.6.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists