diff --git a/drivers/infiniband/sw/rxe/rxe_param.h b/drivers/infiniband/sw/rxe/rxe_param.h index f9fb56ec6dfd..dca86422b0a2 100644 --- a/drivers/infiniband/sw/rxe/rxe_param.h +++ b/drivers/infiniband/sw/rxe/rxe_param.h @@ -98,6 +98,12 @@ enum rxe_device_param { RXE_INFLIGHT_SKBS_PER_QP_HIGH = 64, RXE_INFLIGHT_SKBS_PER_QP_LOW = 16, + /* Max number of interations of each tasklet + * before yielding the cpu to let other + * work make progress + */ + RXE_MAX_ITERATIONS = 1024, + /* Delay before calling arbiter timer */ RXE_NSEC_ARB_TIMER_DELAY = 200, diff --git a/drivers/infiniband/sw/rxe/rxe_task.c b/drivers/infiniband/sw/rxe/rxe_task.c index 6951fdcb31bf..568cf56c236b 100644 --- a/drivers/infiniband/sw/rxe/rxe_task.c +++ b/drivers/infiniband/sw/rxe/rxe_task.c @@ -8,7 +8,7 @@ #include #include -#include "rxe_task.h" +#include "rxe.h" int __rxe_do_task(struct rxe_task *task) @@ -34,6 +34,7 @@ void rxe_do_task(struct tasklet_struct *t) int ret; unsigned long flags; struct rxe_task *task = from_tasklet(task, t, tasklet); + unsigned int iterations = RXE_MAX_ITERATIONS; spin_lock_irqsave(&task->state_lock, flags); switch (task->state) { @@ -62,13 +63,20 @@ void rxe_do_task(struct tasklet_struct *t) spin_lock_irqsave(&task->state_lock, flags); switch (task->state) { case TASK_STATE_BUSY: - if (ret) + if (ret) { task->state = TASK_STATE_START; - else + } else if (iterations--) { cont = 1; + } else { + /* reschedule the tasklet and exit + * the loop to give up the cpu + */ + tasklet_schedule(&task->tasklet); + task->state = TASK_STATE_START; + } break; - /* soneone tried to run the task since the last time we called + /* someone tried to run the task since the last time we called * func, so we will call one more time regardless of the * return value */