Added RDMA device resource tracking object per task.
Added comments to capture usage of task lock by device cgroup
for rdma.
Signed-off-by: Parav Pandit <pandit.parav@xxxxxxxxx>
---
include/linux/sched.h | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index ae21f15..a5f79b6 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1334,6 +1334,8 @@ union rcu_special {
};
struct rcu_node;
+struct task_rdma_res_counter;
+
enum perf_event_task_context {
perf_invalid_context = -1,
perf_hw_context = 0,
@@ -1637,6 +1639,14 @@ struct task_struct {
struct css_set __rcu *cgroups;
/* cg_list protected by css_set_lock and tsk->alloc_lock */
struct list_head cg_list;
+
+#ifdef CONFIG_CGROUP_RDMA_RESOURCE
+ /* RDMA resource accounting counters, allocated only
+ * when RDMA resources are created by a task.
+ */
+ struct task_rdma_res_counter *rdma_res_counter;
+#endif
+
#endif
#ifdef CONFIG_FUTEX
struct robust_list_head __user *robust_list;
@@ -2676,7 +2686,7 @@ static inline int thread_group_empty(struct task_struct *p)
* Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring
* subscriptions and synchronises with wait4(). Also used in procfs. Also
* pins the final release of task.io_context. Also protects ->cpuset and
- * ->cgroup.subsys[]. And ->vfork_done.
+ * ->cgroup.subsys[]. Also projtects ->vfork_done and ->rdma_res_counter.
*
* Nests both inside and outside of read_lock(&tasklist_lock).
* It must not be nested with write_lock_irq(&tasklist_lock),
--
1.8.3.1
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