From: Jason Wang <jasowang@redhat.com> To: Xie Yongji <xieyongji@bytedance.com>, mst@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, parav@nvidia.com, bob.liu@oracle.com, hch@infradead.org, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net Cc: virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, kvm@vger.kernel.org, linux-aio@kvack.org, linux-fsdevel@vger.kernel.org Subject: Re: [RFC v4 10/11] vduse: Introduce a workqueue for irq injection Date: Thu, 4 Mar 2021 14:59:39 +0800 [thread overview] Message-ID: <d63e4cfd-4992-8493-32b0-18e0478f6e1a@redhat.com> (raw) In-Reply-To: <20210223115048.435-11-xieyongji@bytedance.com> On 2021/2/23 7:50 下午, Xie Yongji wrote: > This patch introduces a workqueue to support injecting > virtqueue's interrupt asynchronously. This is mainly > for performance considerations which makes sure the push() > and pop() for used vring can be asynchronous. Do you have pref numbers for this patch? Thanks > > Signed-off-by: Xie Yongji <xieyongji@bytedance.com> > --- > drivers/vdpa/vdpa_user/vduse_dev.c | 29 +++++++++++++++++++++++------ > 1 file changed, 23 insertions(+), 6 deletions(-) > > diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c > index 8042d3fa57f1..f5adeb9ee027 100644 > --- a/drivers/vdpa/vdpa_user/vduse_dev.c > +++ b/drivers/vdpa/vdpa_user/vduse_dev.c > @@ -42,6 +42,7 @@ struct vduse_virtqueue { > spinlock_t irq_lock; > struct eventfd_ctx *kickfd; > struct vdpa_callback cb; > + struct work_struct inject; > }; > > struct vduse_dev; > @@ -99,6 +100,7 @@ static DEFINE_IDA(vduse_ida); > > static dev_t vduse_major; > static struct class *vduse_class; > +static struct workqueue_struct *vduse_irq_wq; > > static inline struct vduse_dev *vdpa_to_vduse(struct vdpa_device *vdpa) > { > @@ -852,6 +854,17 @@ static int vduse_kickfd_setup(struct vduse_dev *dev, > return 0; > } > > +static void vduse_vq_irq_inject(struct work_struct *work) > +{ > + struct vduse_virtqueue *vq = container_of(work, > + struct vduse_virtqueue, inject); > + > + spin_lock_irq(&vq->irq_lock); > + if (vq->ready && vq->cb.callback) > + vq->cb.callback(vq->cb.private); > + spin_unlock_irq(&vq->irq_lock); > +} > + > static long vduse_dev_ioctl(struct file *file, unsigned int cmd, > unsigned long arg) > { > @@ -917,12 +930,7 @@ static long vduse_dev_ioctl(struct file *file, unsigned int cmd, > break; > > vq = &dev->vqs[arg]; > - spin_lock_irq(&vq->irq_lock); > - if (vq->ready && vq->cb.callback) { > - vq->cb.callback(vq->cb.private); > - ret = 0; > - } > - spin_unlock_irq(&vq->irq_lock); > + queue_work(vduse_irq_wq, &vq->inject); > break; > } > case VDUSE_INJECT_CONFIG_IRQ: > @@ -1109,6 +1117,7 @@ static int vduse_create_dev(struct vduse_dev_config *config) > > for (i = 0; i < dev->vq_num; i++) { > dev->vqs[i].index = i; > + INIT_WORK(&dev->vqs[i].inject, vduse_vq_irq_inject); > spin_lock_init(&dev->vqs[i].kick_lock); > spin_lock_init(&dev->vqs[i].irq_lock); > } > @@ -1333,6 +1342,11 @@ static int vduse_init(void) > if (ret) > goto err_chardev; > > + vduse_irq_wq = alloc_workqueue("vduse-irq", > + WQ_HIGHPRI | WQ_SYSFS | WQ_UNBOUND, 0); > + if (!vduse_irq_wq) > + goto err_wq; > + > ret = vduse_domain_init(); > if (ret) > goto err_domain; > @@ -1344,6 +1358,8 @@ static int vduse_init(void) > return 0; > err_mgmtdev: > vduse_domain_exit(); > +err_wq: > + destroy_workqueue(vduse_irq_wq); > err_domain: > unregister_chrdev_region(vduse_major, VDUSE_DEV_MAX); > err_chardev: > @@ -1359,6 +1375,7 @@ static void vduse_exit(void) > misc_deregister(&vduse_misc); > class_destroy(vduse_class); > unregister_chrdev_region(vduse_major, VDUSE_DEV_MAX); > + destroy_workqueue(vduse_irq_wq); > vduse_domain_exit(); > vduse_mgmtdev_exit(); > }
WARNING: multiple messages have this Message-ID (diff)
From: Jason Wang <jasowang@redhat.com> To: Xie Yongji <xieyongji@bytedance.com>, mst@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, parav@nvidia.com, bob.liu@oracle.com, hch@infradead.org, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net Cc: linux-aio@kvack.org, netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org Subject: Re: [RFC v4 10/11] vduse: Introduce a workqueue for irq injection Date: Thu, 4 Mar 2021 14:59:39 +0800 [thread overview] Message-ID: <d63e4cfd-4992-8493-32b0-18e0478f6e1a@redhat.com> (raw) In-Reply-To: <20210223115048.435-11-xieyongji@bytedance.com> On 2021/2/23 7:50 下午, Xie Yongji wrote: > This patch introduces a workqueue to support injecting > virtqueue's interrupt asynchronously. This is mainly > for performance considerations which makes sure the push() > and pop() for used vring can be asynchronous. Do you have pref numbers for this patch? Thanks > > Signed-off-by: Xie Yongji <xieyongji@bytedance.com> > --- > drivers/vdpa/vdpa_user/vduse_dev.c | 29 +++++++++++++++++++++++------ > 1 file changed, 23 insertions(+), 6 deletions(-) > > diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c > index 8042d3fa57f1..f5adeb9ee027 100644 > --- a/drivers/vdpa/vdpa_user/vduse_dev.c > +++ b/drivers/vdpa/vdpa_user/vduse_dev.c > @@ -42,6 +42,7 @@ struct vduse_virtqueue { > spinlock_t irq_lock; > struct eventfd_ctx *kickfd; > struct vdpa_callback cb; > + struct work_struct inject; > }; > > struct vduse_dev; > @@ -99,6 +100,7 @@ static DEFINE_IDA(vduse_ida); > > static dev_t vduse_major; > static struct class *vduse_class; > +static struct workqueue_struct *vduse_irq_wq; > > static inline struct vduse_dev *vdpa_to_vduse(struct vdpa_device *vdpa) > { > @@ -852,6 +854,17 @@ static int vduse_kickfd_setup(struct vduse_dev *dev, > return 0; > } > > +static void vduse_vq_irq_inject(struct work_struct *work) > +{ > + struct vduse_virtqueue *vq = container_of(work, > + struct vduse_virtqueue, inject); > + > + spin_lock_irq(&vq->irq_lock); > + if (vq->ready && vq->cb.callback) > + vq->cb.callback(vq->cb.private); > + spin_unlock_irq(&vq->irq_lock); > +} > + > static long vduse_dev_ioctl(struct file *file, unsigned int cmd, > unsigned long arg) > { > @@ -917,12 +930,7 @@ static long vduse_dev_ioctl(struct file *file, unsigned int cmd, > break; > > vq = &dev->vqs[arg]; > - spin_lock_irq(&vq->irq_lock); > - if (vq->ready && vq->cb.callback) { > - vq->cb.callback(vq->cb.private); > - ret = 0; > - } > - spin_unlock_irq(&vq->irq_lock); > + queue_work(vduse_irq_wq, &vq->inject); > break; > } > case VDUSE_INJECT_CONFIG_IRQ: > @@ -1109,6 +1117,7 @@ static int vduse_create_dev(struct vduse_dev_config *config) > > for (i = 0; i < dev->vq_num; i++) { > dev->vqs[i].index = i; > + INIT_WORK(&dev->vqs[i].inject, vduse_vq_irq_inject); > spin_lock_init(&dev->vqs[i].kick_lock); > spin_lock_init(&dev->vqs[i].irq_lock); > } > @@ -1333,6 +1342,11 @@ static int vduse_init(void) > if (ret) > goto err_chardev; > > + vduse_irq_wq = alloc_workqueue("vduse-irq", > + WQ_HIGHPRI | WQ_SYSFS | WQ_UNBOUND, 0); > + if (!vduse_irq_wq) > + goto err_wq; > + > ret = vduse_domain_init(); > if (ret) > goto err_domain; > @@ -1344,6 +1358,8 @@ static int vduse_init(void) > return 0; > err_mgmtdev: > vduse_domain_exit(); > +err_wq: > + destroy_workqueue(vduse_irq_wq); > err_domain: > unregister_chrdev_region(vduse_major, VDUSE_DEV_MAX); > err_chardev: > @@ -1359,6 +1375,7 @@ static void vduse_exit(void) > misc_deregister(&vduse_misc); > class_destroy(vduse_class); > unregister_chrdev_region(vduse_major, VDUSE_DEV_MAX); > + destroy_workqueue(vduse_irq_wq); > vduse_domain_exit(); > vduse_mgmtdev_exit(); > } _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
next prev parent reply other threads:[~2021-03-04 7:02 UTC|newest] Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-02-23 11:50 [RFC v4 00/11] Introduce VDUSE - vDPA Device in Userspace Xie Yongji 2021-02-23 11:50 ` [RFC v4 01/11] eventfd: Increase the recursion depth of eventfd_signal() Xie Yongji 2021-03-02 6:44 ` Jason Wang 2021-03-02 6:44 ` Jason Wang 2021-03-02 10:32 ` Yongji Xie 2021-02-23 11:50 ` [RFC v4 02/11] vhost-vdpa: protect concurrent access to vhost device iotlb Xie Yongji 2021-03-02 6:47 ` Jason Wang 2021-03-02 6:47 ` Jason Wang 2021-03-02 10:20 ` Yongji Xie 2021-02-23 11:50 ` [RFC v4 03/11] vhost-iotlb: Add an opaque pointer for vhost IOTLB Xie Yongji 2021-03-02 6:49 ` Jason Wang 2021-03-02 6:49 ` Jason Wang 2021-02-23 11:50 ` [RFC v4 04/11] vdpa: Add an opaque pointer for vdpa_config_ops.dma_map() Xie Yongji 2021-03-02 6:50 ` Jason Wang 2021-03-02 6:50 ` Jason Wang 2021-02-23 11:50 ` [RFC v4 05/11] vdpa: Support transferring virtual addressing during DMA mapping Xie Yongji 2021-02-24 7:37 ` Dan Carpenter 2021-02-24 7:37 ` Dan Carpenter 2021-03-03 10:52 ` Mika Penttilä 2021-03-03 12:45 ` Yongji Xie 2021-03-03 13:38 ` Mika Penttilä 2021-03-04 3:07 ` Jason Wang 2021-03-04 3:07 ` Jason Wang 2021-03-04 5:40 ` Yongji Xie 2021-02-23 11:50 ` [RFC v4 06/11] vduse: Implement an MMU-based IOMMU driver Xie Yongji 2021-03-04 4:20 ` Jason Wang 2021-03-04 4:20 ` Jason Wang 2021-03-04 5:12 ` Yongji Xie 2021-03-05 3:35 ` Jason Wang 2021-03-05 3:35 ` Jason Wang 2021-03-05 6:15 ` Yongji Xie 2021-03-05 6:51 ` Jason Wang 2021-03-05 7:13 ` Yongji Xie 2021-03-05 7:27 ` Jason Wang 2021-03-05 7:27 ` Jason Wang 2021-03-05 7:59 ` Yongji Xie 2021-03-08 3:17 ` Jason Wang 2021-03-08 3:17 ` Jason Wang 2021-03-08 3:45 ` Yongji Xie 2021-03-08 3:52 ` Jason Wang 2021-03-08 3:52 ` Jason Wang 2021-03-08 5:05 ` Yongji Xie 2021-03-08 7:04 ` Jason Wang 2021-03-08 7:04 ` Jason Wang 2021-03-08 7:08 ` Yongji Xie 2021-02-23 11:50 ` [RFC v4 07/11] vduse: Introduce VDUSE - vDPA Device in Userspace Xie Yongji 2021-02-23 15:44 ` kernel test robot 2021-02-23 20:24 ` kernel test robot 2021-03-04 6:27 ` Jason Wang 2021-03-04 6:27 ` Jason Wang 2021-03-04 8:05 ` Yongji Xie 2021-03-05 3:20 ` Jason Wang 2021-03-05 3:20 ` Jason Wang 2021-03-05 3:49 ` Yongji Xie 2021-03-10 12:58 ` Jason Wang 2021-03-10 12:58 ` Jason Wang 2021-03-11 2:28 ` Yongji Xie 2021-02-23 11:50 ` [RFC v4 08/11] vduse: Add config interrupt support Xie Yongji 2021-02-23 11:50 ` [RFC v4 09/11] Documentation: Add documentation for VDUSE Xie Yongji 2021-03-04 6:39 ` Jason Wang 2021-03-04 6:39 ` Jason Wang 2021-03-04 10:35 ` Yongji Xie 2021-02-23 11:50 ` [RFC v4 10/11] vduse: Introduce a workqueue for irq injection Xie Yongji 2021-03-04 6:59 ` Jason Wang [this message] 2021-03-04 6:59 ` Jason Wang 2021-03-04 8:58 ` Yongji Xie 2021-03-05 3:04 ` Jason Wang 2021-03-05 3:04 ` Jason Wang 2021-03-05 3:30 ` Yongji Xie 2021-03-05 3:42 ` Jason Wang 2021-03-05 3:42 ` Jason Wang 2021-03-05 6:36 ` Yongji Xie 2021-03-05 7:01 ` Jason Wang 2021-03-05 7:01 ` Jason Wang 2021-03-05 7:27 ` Yongji Xie 2021-03-05 7:36 ` Jason Wang 2021-03-05 7:36 ` Jason Wang 2021-03-05 8:12 ` Yongji Xie 2021-03-08 3:04 ` Jason Wang 2021-03-08 3:04 ` Jason Wang 2021-03-08 4:50 ` Yongji Xie 2021-03-08 7:01 ` Jason Wang 2021-03-08 7:01 ` Jason Wang 2021-03-08 7:16 ` Yongji Xie 2021-03-08 7:29 ` Jason Wang 2021-03-08 7:29 ` Jason Wang 2021-02-23 11:50 ` [RFC v4 11/11] vduse: Support binding irq to the specified cpu Xie Yongji 2021-03-04 7:30 ` Jason Wang 2021-03-04 7:30 ` Jason Wang 2021-03-04 8:19 ` Yongji Xie 2021-03-05 3:11 ` Jason Wang 2021-03-05 3:11 ` Jason Wang 2021-03-05 3:37 ` Yongji Xie 2021-03-05 3:44 ` Jason Wang 2021-03-05 3:44 ` Jason Wang 2021-03-05 6:40 ` Yongji Xie
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