diff options
| author | Olav Haugan <ohaugan@codeaurora.org> | 2014-07-22 15:45:14 -0700 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 19:59:57 -0700 |
| commit | 75166225073f9bfaefdc740c5c4fe2064cb33c77 (patch) | |
| tree | fc90d27a527d209a1ae5a6a58889418777364a83 /kernel | |
| parent | b32244628fe20dde5b5175dc4dbc6c562d09df77 (diff) | |
sched/fair: Check whether any CPUs are available
There is a possibility that there are no allowed CPUs online when we try
to select the best cpu for a small task. Add a check to ensure we don't
continue if there are no CPUs available.
CRs-fixed: 692505
Change-Id: Iff955fb0d0b07e758a893539f7bc8ea8aa09d9c4
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/fair.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 14904696fc63..36c996bfb844 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -2947,6 +2947,9 @@ static int best_small_task_cpu(struct task_struct *p) cpumask_and(&search_cpus, tsk_cpus_allowed(p), cpu_online_mask); + if (cpumask_empty(&search_cpus)) + return task_cpu(p); + /* Take a first pass to find the lowest power cost CPU. This will avoid a potential O(n^2) search */ for_each_cpu(i, &search_cpus) { |