diff options
| author | David S. Miller <davem@davemloft.net> | 2009-08-10 08:29:47 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-08-10 08:29:47 +0400 |
| commit | f222e8b40f2177b1c4cac015b117744c1d3fa3e9 (patch) | |
| tree | 7c5fc22c08da900e21b0e7ab2376e8e8e44a63c0 /kernel/sched_cpupri.c | |
| parent | 819ae6a389d4acfab9a7bb874fa1977aa464d14b (diff) | |
| parent | f4b9a988685da6386d7f9a72df3098bcc3270526 (diff) | |
| download | linux-f222e8b40f2177b1c4cac015b117744c1d3fa3e9.tar.xz | |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Diffstat (limited to 'kernel/sched_cpupri.c')
| -rw-r--r-- | kernel/sched_cpupri.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/kernel/sched_cpupri.c b/kernel/sched_cpupri.c index e6c251790dde..d014efbf947a 100644 --- a/kernel/sched_cpupri.c +++ b/kernel/sched_cpupri.c @@ -81,8 +81,21 @@ int cpupri_find(struct cpupri *cp, struct task_struct *p, if (cpumask_any_and(&p->cpus_allowed, vec->mask) >= nr_cpu_ids) continue; - if (lowest_mask) + if (lowest_mask) { cpumask_and(lowest_mask, &p->cpus_allowed, vec->mask); + + /* + * We have to ensure that we have at least one bit + * still set in the array, since the map could have + * been concurrently emptied between the first and + * second reads of vec->mask. If we hit this + * condition, simply act as though we never hit this + * priority level and continue on. + */ + if (cpumask_any(lowest_mask) >= nr_cpu_ids) + continue; + } + return 1; } |