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authorDaniel Jordan <daniel.m.jordan@oracle.com>2019-09-06 04:40:27 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2019-09-13 14:15:40 +0300
commit45d153c08bc73c8ced640dc20d8f2b749a6cb0d0 (patch)
tree52e892c2a0ed227a9da6a081fd7b842bc69fa5b4 /kernel/padata.c
parentcc491d8e6486c56e07e60d9992cd56f63dc9fd6c (diff)
downloadlinux-45d153c08bc73c8ced640dc20d8f2b749a6cb0d0.tar.xz
padata: use separate workqueues for parallel and serial work
padata currently uses one per-CPU workqueue per instance for all work. Prepare for running parallel jobs on an unbound workqueue by introducing dedicated workqueues for parallel and serial work. Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> Acked-by: Steffen Klassert <steffen.klassert@secunet.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Lai Jiangshan <jiangshanlai@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tejun Heo <tj@kernel.org> Cc: linux-crypto@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'kernel/padata.c')
-rw-r--r--kernel/padata.c28
1 files changed, 18 insertions, 10 deletions
diff --git a/kernel/padata.c b/kernel/padata.c
index 8a362923c488..669f5d53d357 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -152,7 +152,7 @@ int padata_do_parallel(struct padata_instance *pinst,
list_add_tail(&padata->list, &queue->parallel.list);
spin_unlock(&queue->parallel.lock);
- queue_work_on(target_cpu, pinst->wq, &queue->work);
+ queue_work_on(target_cpu, pinst->parallel_wq, &queue->work);
out:
rcu_read_unlock_bh();
@@ -261,7 +261,7 @@ static void padata_reorder(struct parallel_data *pd)
list_add_tail(&padata->list, &squeue->serial.list);
spin_unlock(&squeue->serial.lock);
- queue_work_on(cb_cpu, pinst->wq, &squeue->work);
+ queue_work_on(cb_cpu, pinst->serial_wq, &squeue->work);
}
spin_unlock_bh(&pd->lock);
@@ -278,7 +278,7 @@ static void padata_reorder(struct parallel_data *pd)
next_queue = per_cpu_ptr(pd->pqueue, pd->cpu);
if (!list_empty(&next_queue->reorder.list))
- queue_work(pinst->wq, &pd->reorder_work);
+ queue_work(pinst->serial_wq, &pd->reorder_work);
}
static void invoke_padata_reorder(struct work_struct *work)
@@ -818,7 +818,8 @@ static void __padata_free(struct padata_instance *pinst)
padata_free_pd(pinst->pd);
free_cpumask_var(pinst->cpumask.pcpu);
free_cpumask_var(pinst->cpumask.cbcpu);
- destroy_workqueue(pinst->wq);
+ destroy_workqueue(pinst->serial_wq);
+ destroy_workqueue(pinst->parallel_wq);
kfree(pinst);
}
@@ -967,18 +968,23 @@ static struct padata_instance *padata_alloc(const char *name,
if (!pinst)
goto err;
- pinst->wq = alloc_workqueue("%s", WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE,
- 1, name);
- if (!pinst->wq)
+ pinst->parallel_wq = alloc_workqueue("%s_parallel", WQ_MEM_RECLAIM |
+ WQ_CPU_INTENSIVE, 1, name);
+ if (!pinst->parallel_wq)
goto err_free_inst;
get_online_cpus();
- if (!alloc_cpumask_var(&pinst->cpumask.pcpu, GFP_KERNEL))
+ pinst->serial_wq = alloc_workqueue("%s_serial", WQ_MEM_RECLAIM |
+ WQ_CPU_INTENSIVE, 1, name);
+ if (!pinst->serial_wq)
goto err_put_cpus;
+
+ if (!alloc_cpumask_var(&pinst->cpumask.pcpu, GFP_KERNEL))
+ goto err_free_serial_wq;
if (!alloc_cpumask_var(&pinst->cpumask.cbcpu, GFP_KERNEL)) {
free_cpumask_var(pinst->cpumask.pcpu);
- goto err_put_cpus;
+ goto err_free_serial_wq;
}
if (!padata_validate_cpumask(pinst, pcpumask) ||
!padata_validate_cpumask(pinst, cbcpumask))
@@ -1010,9 +1016,11 @@ static struct padata_instance *padata_alloc(const char *name,
err_free_masks:
free_cpumask_var(pinst->cpumask.pcpu);
free_cpumask_var(pinst->cpumask.cbcpu);
+err_free_serial_wq:
+ destroy_workqueue(pinst->serial_wq);
err_put_cpus:
put_online_cpus();
- destroy_workqueue(pinst->wq);
+ destroy_workqueue(pinst->parallel_wq);
err_free_inst:
kfree(pinst);
err: