diff options
| author | Joonwoo Park <joonwoop@codeaurora.org> | 2016-11-28 13:41:18 -0800 |
|---|---|---|
| committer | Joonwoo Park <joonwoop@codeaurora.org> | 2016-12-01 11:28:01 -0800 |
| commit | 7437cd7c4bb7a463ec2cac7c37283f9eec5c01c2 (patch) | |
| tree | 78de070f02650f605f49d8884a9c4a73753644a0 /include | |
| parent | 9aa1df0cf5ffb58b52b55b4fe2ea6531f795e186 (diff) | |
sched: pre-allocate colocation groups
At present, sched_set_group_id() dynamically allocates structure for
colocation group to assign the given task to the group. However
this can cause deadlock as memory allocator can wakeup a task which
also tries to acquire related_thread_group_lock.
Avoid such deadlock by pre-allocating colocation structures. This
limits maximum colocation groups to static number but it's fine as it's
never expected to be a lot.
Change-Id: Ifc32ab4ead63c382ae390358ed86f7cc5b6eb2dc
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sched.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 4f6711f31939..9c3be2d56ac5 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2401,6 +2401,8 @@ struct cpu_cycle_counter_cb { u64 (*get_cpu_cycle_counter)(int cpu); }; +#define MAX_NUM_CGROUP_COLOC_ID 20 + #ifdef CONFIG_SCHED_HMP extern void free_task_load_ptrs(struct task_struct *p); extern int sched_set_window(u64 window_start, unsigned int window_size); |