From: Marco Crivellari Date: Fri, 7 Nov 2025 11:23:54 +0000 (+0100) Subject: crypto: qat - add WQ_PERCPU to alloc_workqueue users X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=06c489ce5b5053d6f9eddac7ccc0d80839e11198;p=thirdparty%2Flinux.git crypto: qat - add WQ_PERCPU to alloc_workqueue users Currently if a user enqueues a work item using schedule_delayed_work() the used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to schedule_work() that is using system_wq and queue_work(), that makes use again of WORK_CPU_UNBOUND. This lack of consistency cannot be addressed without refactoring the API. alloc_workqueue() treats all queues as per-CPU by default, while unbound workqueues must opt-in via WQ_UNBOUND. This default is suboptimal: most workloads benefit from unbound queues, allowing the scheduler to place worker threads where they’re needed and reducing noise when CPUs are isolated. This continues the effort to refactor workqueue APIs, which began with the introduction of new workqueues and a new alloc_workqueue flag in: commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq") commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag") This change adds a new WQ_PERCPU flag to explicitly request alloc_workqueue() to be per-cpu when WQ_UNBOUND has not been specified. With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND), any alloc_workqueue() caller that doesn’t explicitly specify WQ_UNBOUND must now use WQ_PERCPU. Once migration is complete, WQ_UNBOUND can be removed and unbound will become the implicit default. Suggested-by: Tejun Heo Signed-off-by: Marco Crivellari Acked-by: Giovanni Cabiddu Signed-off-by: Herbert Xu --- diff --git a/drivers/crypto/intel/qat/qat_common/adf_aer.c b/drivers/crypto/intel/qat/qat_common/adf_aer.c index 35679b21ff63b..667d5e320f509 100644 --- a/drivers/crypto/intel/qat/qat_common/adf_aer.c +++ b/drivers/crypto/intel/qat/qat_common/adf_aer.c @@ -276,11 +276,11 @@ int adf_notify_fatal_error(struct adf_accel_dev *accel_dev) int adf_init_aer(void) { device_reset_wq = alloc_workqueue("qat_device_reset_wq", - WQ_MEM_RECLAIM, 0); + WQ_MEM_RECLAIM | WQ_PERCPU, 0); if (!device_reset_wq) return -EFAULT; - device_sriov_wq = alloc_workqueue("qat_device_sriov_wq", 0, 0); + device_sriov_wq = alloc_workqueue("qat_device_sriov_wq", WQ_PERCPU, 0); if (!device_sriov_wq) { destroy_workqueue(device_reset_wq); device_reset_wq = NULL; diff --git a/drivers/crypto/intel/qat/qat_common/adf_isr.c b/drivers/crypto/intel/qat/qat_common/adf_isr.c index 12e5656136610..4639d7fd93e6e 100644 --- a/drivers/crypto/intel/qat/qat_common/adf_isr.c +++ b/drivers/crypto/intel/qat/qat_common/adf_isr.c @@ -384,7 +384,8 @@ EXPORT_SYMBOL_GPL(adf_isr_resource_alloc); */ int __init adf_init_misc_wq(void) { - adf_misc_wq = alloc_workqueue("qat_misc_wq", WQ_MEM_RECLAIM, 0); + adf_misc_wq = alloc_workqueue("qat_misc_wq", + WQ_MEM_RECLAIM | WQ_PERCPU, 0); return !adf_misc_wq ? -ENOMEM : 0; } diff --git a/drivers/crypto/intel/qat/qat_common/adf_sriov.c b/drivers/crypto/intel/qat/qat_common/adf_sriov.c index 31d1ef0cb1f52..bb904ba4bf840 100644 --- a/drivers/crypto/intel/qat/qat_common/adf_sriov.c +++ b/drivers/crypto/intel/qat/qat_common/adf_sriov.c @@ -299,7 +299,8 @@ EXPORT_SYMBOL_GPL(adf_sriov_configure); int __init adf_init_pf_wq(void) { /* Workqueue for PF2VF responses */ - pf2vf_resp_wq = alloc_workqueue("qat_pf2vf_resp_wq", WQ_MEM_RECLAIM, 0); + pf2vf_resp_wq = alloc_workqueue("qat_pf2vf_resp_wq", + WQ_MEM_RECLAIM | WQ_PERCPU, 0); return !pf2vf_resp_wq ? -ENOMEM : 0; } diff --git a/drivers/crypto/intel/qat/qat_common/adf_vf_isr.c b/drivers/crypto/intel/qat/qat_common/adf_vf_isr.c index a4636ec9f9cac..d0fef20a3df4a 100644 --- a/drivers/crypto/intel/qat/qat_common/adf_vf_isr.c +++ b/drivers/crypto/intel/qat/qat_common/adf_vf_isr.c @@ -299,7 +299,8 @@ EXPORT_SYMBOL_GPL(adf_flush_vf_wq); */ int __init adf_init_vf_wq(void) { - adf_vf_stop_wq = alloc_workqueue("adf_vf_stop_wq", WQ_MEM_RECLAIM, 0); + adf_vf_stop_wq = alloc_workqueue("adf_vf_stop_wq", + WQ_MEM_RECLAIM | WQ_PERCPU, 0); return !adf_vf_stop_wq ? -EFAULT : 0; }