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| author |   Peter Zijlstra <peterz@infradead.org> | 2021-03-29 15:18:35 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-05-12 11:43:31 +0200 |
| commit | 85dd3f61203c5cfa72b308ff327b5fbf3fc1ce5e (patch) | |
| tree | ace8780b1ed4212015463c4566c075d08259d46c /kernel/fork.c | |
| parent | sched: Trivial core scheduling cookie management (diff) | |
| download | linux-dev-85dd3f61203c5cfa72b308ff327b5fbf3fc1ce5e.tar.xz linux-dev-85dd3f61203c5cfa72b308ff327b5fbf3fc1ce5e.zip | |
sched: Inherit task cookie on fork()
Note that sched_core_fork() is called from under tasklist_lock, and
not from sched_fork() earlier. This avoids a few races later.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Don Hiatt <dhiatt@digitalocean.com>
Tested-by: Hongyu Ning <hongyu.ning@linux.intel.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lkml.kernel.org/r/20210422123308.980003687@infradead.org
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index d16c60c9daca..e7fd928fcafe 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -2251,6 +2251,8 @@ static __latent_entropy struct task_struct *copy_process( klp_copy_process(p); + sched_core_fork(p); + spin_lock(¤t->sighand->siglock); /* @@ -2338,6 +2340,7 @@ static __latent_entropy struct task_struct *copy_process( return p; bad_fork_cancel_cgroup: + sched_core_free(p); spin_unlock(¤t->sighand->siglock); write_unlock_irq(&tasklist_lock); cgroup_cancel_fork(p, args); |