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();
> }
next prev parent reply other threads:[~2021-03-04 7:02 UTC|newest]
Thread overview: 65+ 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 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 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
2021-02-23 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
2021-02-23 11:50 ` [RFC v4 05/11] vdpa: Support transferring virtual addressing during DMA mapping Xie Yongji
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 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 5:12 ` Yongji Xie
2021-03-05 3:35 ` Jason Wang
2021-03-05 6:15 ` Yongji Xie
[not found] ` <4db35f8c-ee3a-90fb-8d14-5d6014b4f6fa@redhat.com>
2021-03-05 7:13 ` Yongji Xie
2021-03-05 7:27 ` Jason Wang
2021-03-05 7:59 ` Yongji Xie
2021-03-08 3:17 ` Jason Wang
2021-03-08 3:45 ` Yongji Xie
2021-03-08 3:52 ` Jason Wang
2021-03-08 5:05 ` Yongji Xie
2021-03-08 7:04 ` Jason Wang
2021-03-08 7:08 ` Yongji Xie
2021-02-23 11:50 ` [RFC v4 07/11] vduse: Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2021-03-04 6:27 ` Jason Wang
2021-03-04 8:05 ` Yongji Xie
2021-03-05 3:20 ` Jason Wang
2021-03-05 3:49 ` Yongji Xie
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 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 8:58 ` Yongji Xie
2021-03-05 3:04 ` Jason Wang
2021-03-05 3:30 ` Yongji Xie
2021-03-05 3:42 ` Jason Wang
2021-03-05 6:36 ` Yongji Xie
2021-03-05 7:01 ` Jason Wang
2021-03-05 7:27 ` Yongji Xie
2021-03-05 7:36 ` Jason Wang
2021-03-05 8:12 ` Yongji Xie
2021-03-08 3:04 ` Jason Wang
2021-03-08 4:50 ` Yongji Xie
2021-03-08 7:01 ` Jason Wang
2021-03-08 7:16 ` Yongji Xie
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 8:19 ` Yongji Xie
2021-03-05 3:11 ` Jason Wang
2021-03-05 3:37 ` Yongji Xie
2021-03-05 3:44 ` Jason Wang
2021-03-05 6:40 ` Yongji Xie
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=d63e4cfd-4992-8493-32b0-18e0478f6e1a@redhat.com \
--to=jasowang@redhat.com \
--cc=axboe@kernel.dk \
--cc=bcrl@kvack.org \
--cc=bob.liu@oracle.com \
--cc=corbet@lwn.net \
--cc=hch@infradead.org \
--cc=kvm@vger.kernel.org \
--cc=linux-aio@kvack.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=mst@redhat.com \
--cc=netdev@vger.kernel.org \
--cc=parav@nvidia.com \
--cc=rdunlap@infradead.org \
--cc=sgarzare@redhat.com \
--cc=stefanha@redhat.com \
--cc=viro@zeniv.linux.org.uk \
--cc=virtualization@lists.linux-foundation.org \
--cc=willy@infradead.org \
--cc=xieyongji@bytedance.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).