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| author | Will Deacon <will@kernel.org> | 2021-07-30 13:24:33 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-08-20 12:33:00 +0200 |
| commit | b90ca8badbd11488e5f762346b028666808164e7 (patch) | |
| tree | 38cf3f80ceb6e2ae051c85fbb7b4696fecc90ed6 /init/init_task.c | |
| parent | sched: Reject CPU affinity changes based on task_cpu_possible_mask() (diff) | |
| download | linux-b90ca8badbd11488e5f762346b028666808164e7.tar.xz linux-b90ca8badbd11488e5f762346b028666808164e7.zip | |
sched: Introduce task_struct::user_cpus_ptr to track requested affinity
In preparation for saving and restoring the user-requested CPU affinity
mask of a task, add a new cpumask_t pointer to 'struct task_struct'.
If the pointer is non-NULL, then the mask is copied across fork() and
freed on task exit.
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <Valentin.Schneider@arm.com>
Link: https://lore.kernel.org/r/20210730112443.23245-7-will@kernel.org
Diffstat (limited to 'init/init_task.c')
| -rw-r--r-- | init/init_task.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/init/init_task.c b/init/init_task.c index 562f2ef8d157..2d024066e27b 100644 --- a/init/init_task.c +++ b/init/init_task.c @@ -80,6 +80,7 @@ struct task_struct init_task .normal_prio = MAX_PRIO - 20, .policy = SCHED_NORMAL, .cpus_ptr = &init_task.cpus_mask, + .user_cpus_ptr = NULL, .cpus_mask = CPU_MASK_ALL, .nr_cpus_allowed= NR_CPUS, .mm = NULL, |