search for: wq_buf_avail

...uct virtio_device *vdev = nd_region->provider_data; > + struct virtio_pmem *vpmem = vdev->priv; > + struct virtio_pmem_request *req; > + > + might_sleep(); > + req = kmalloc(sizeof(*req), GFP_KERNEL); > + if (!req) > + return -ENOMEM; > + > + req->done = req->wq_buf_avail = false; > + strcpy(req->name, "FLUSH"); > + init_waitqueue_head(&req->host_acked); > + init_waitqueue_head(&req->wq_buf); > + sg_init_one(&sg, req->name, strlen(req->name)); > + sgs[0] = &sg; > + sg_init_one(&ret, &req->ret, siz...

...uct virtio_device *vdev = nd_region->provider_data; > + struct virtio_pmem *vpmem = vdev->priv; > + struct virtio_pmem_request *req; > + > + might_sleep(); > + req = kmalloc(sizeof(*req), GFP_KERNEL); > + if (!req) > + return -ENOMEM; > + > + req->done = req->wq_buf_avail = false; > + strcpy(req->name, "FLUSH"); > + init_waitqueue_head(&req->host_acked); > + init_waitqueue_head(&req->wq_buf); > + sg_init_one(&sg, req->name, strlen(req->name)); > + sgs[0] = &sg; > + sg_init_one(&ret, &req->ret, siz...

...der_data; > > + struct virtio_pmem *vpmem = vdev->priv; > > + struct virtio_pmem_request *req; > > + > > + might_sleep(); > > + req = kmalloc(sizeof(*req), GFP_KERNEL); > > + if (!req) > > + return -ENOMEM; > > + > > + req->done = req->wq_buf_avail = false; > > + strcpy(req->name, "FLUSH"); > > + init_waitqueue_head(&req->host_acked); > > + init_waitqueue_head(&req->wq_buf); > > + sg_init_one(&sg, req->name, strlen(req->name)); > > + sgs[0] = &sg; > > + sg_init_one(&...

On 5/14/19 7:54 AM, Pankaj Gupta wrote: > + if (!list_empty(&vpmem->req_list)) { > + req_buf = list_first_entry(&vpmem->req_list, > + struct virtio_pmem_request, list); > + req_buf->wq_buf_avail = true; > + wake_up(&req_buf->wq_buf); > + list_del(&req_buf->list); Yes, this change is the right one, thank you! > + /* > + * If virtqueue_add_sgs returns -ENOSPC then req_vq virtual > + * queue does not have free descriptor. We add the request > + * to...

On 5/14/19 7:54 AM, Pankaj Gupta wrote: > + if (!list_empty(&vpmem->req_list)) { > + req_buf = list_first_entry(&vpmem->req_list, > + struct virtio_pmem_request, list); > + req_buf->wq_buf_avail = true; > + wake_up(&req_buf->wq_buf); > + list_del(&req_buf->list); Yes, this change is the right one, thank you! > + /* > + * If virtqueue_add_sgs returns -ENOSPC then req_vq virtual > + * queue does not have free descriptor. We add the request > + * to...

Hi Jakub, > > On 5/14/19 7:54 AM, Pankaj Gupta wrote: > > + if (!list_empty(&vpmem->req_list)) { > > + req_buf = list_first_entry(&vpmem->req_list, > > + struct virtio_pmem_request, list); > > + req_buf->wq_buf_avail = true; > > + wake_up(&req_buf->wq_buf); > > + list_del(&req_buf->list); > Yes, this change is the right one, thank you! Thank you for the confirmation. > > > + /* > > + * If virtqueue_add_sgs returns -ENOSPC then req_vq virtual > > + *...

...t_buf(vq, &len)) != NULL) { > + req_data->done = true; > + wake_up(&req_data->host_acked); > + > + if (!list_empty(&vpmem->req_list)) { > + req_buf = list_first_entry(&vpmem->req_list, > + struct virtio_pmem_request, list); > + req_buf->wq_buf_avail = true; > + wake_up(&req_buf->wq_buf); > + list_del(&req_buf->list); > + } > + } > + spin_unlock_irqrestore(&vpmem->pmem_lock, flags); > +} > +EXPORT_SYMBOL_GPL(host_ack); Nit: 'host_ack' looks a bit generic for an exported function... would &...

...t_buf(vq, &len)) != NULL) { > + req_data->done = true; > + wake_up(&req_data->host_acked); > + > + if (!list_empty(&vpmem->req_list)) { > + req_buf = list_first_entry(&vpmem->req_list, > + struct virtio_pmem_request, list); > + req_buf->wq_buf_avail = true; > + wake_up(&req_buf->wq_buf); > + list_del(&req_buf->list); > + } > + } > + spin_unlock_irqrestore(&vpmem->pmem_lock, flags); > +} > +EXPORT_SYMBOL_GPL(host_ack); Nit: 'host_ack' looks a bit generic for an exported function... would &...

...t; + req->done = true; > + wake_up(&req->host_acked); > + > + if (!list_empty(&vpmem->req_list)) { > + req_buf = list_first_entry(&vpmem->req_list, > + struct virtio_pmem_request, list); > + list_del(&vpmem->req_list); > + req_buf->wq_buf_avail = true; > + wake_up(&req_buf->wq_buf); > + } > + } > + spin_unlock_irqrestore(&vpmem->pmem_lock, flags); > +} > +EXPORT_SYMBOL_GPL(host_ack); > + > + /* The request submission function */ > +int virtio_pmem_flush(struct nd_region *nd_region) > +{ >...

...t; + req->done = true; > + wake_up(&req->host_acked); > + > + if (!list_empty(&vpmem->req_list)) { > + req_buf = list_first_entry(&vpmem->req_list, > + struct virtio_pmem_request, list); > + list_del(&vpmem->req_list); > + req_buf->wq_buf_avail = true; > + wake_up(&req_buf->wq_buf); > + } > + } > + spin_unlock_irqrestore(&vpmem->pmem_lock, flags); > +} > +EXPORT_SYMBOL_GPL(host_ack); > + > + /* The request submission function */ > +int virtio_pmem_flush(struct nd_region *nd_region) > +{ >...

...t; + req->done = true; > + wake_up(&req->host_acked); > + > + if (!list_empty(&vpmem->req_list)) { > + req_buf = list_first_entry(&vpmem->req_list, > + struct virtio_pmem_request, list); > + list_del(&vpmem->req_list); > + req_buf->wq_buf_avail = true; > + wake_up(&req_buf->wq_buf); > + } > + } > + spin_unlock_irqrestore(&vpmem->pmem_lock, flags); > +} > +EXPORT_SYMBOL_GPL(host_ack); > + > + /* The request submission function */ > +int virtio_pmem_flush(struct nd_region *nd_region) > +{ >...

...empty(&vpmem->req_list)) { > + req_buf = list_first_entry(&vpmem->req_list, > + struct virtio_pmem_request, list); > + list_del(&vpmem->req_list); > + req_buf->wq_buf_avail = true; > + wake_up(&req_buf->wq_buf); > + } > + } > + spin_unlock_irqrestore(&vpmem->pmem_lock, flags); > +} > +EXPORT_SYMBOL_GPL(host_ack); > + > + /* The request submission function */ > +int virtio_pmem_flu...

...empty(&vpmem->req_list)) { > + req_buf = list_first_entry(&vpmem->req_list, > + struct virtio_pmem_request, list); > + list_del(&vpmem->req_list); > + req_buf->wq_buf_avail = true; > + wake_up(&req_buf->wq_buf); > + } > + } > + spin_unlock_irqrestore(&vpmem->pmem_lock, flags); > +} > +EXPORT_SYMBOL_GPL(host_ack); > + > + /* The request submission function */ > +int virtio_pmem_flu...

...rtqueue_get_buf(vq, &len)) != NULL) { > + req->done = true; > + wake_up(&req->host_acked); > + > + if (!list_empty(&vpmem->req_list)) { > + req_buf = list_first_entry(&vpmem->req_list, > + struct virtio_pmem_request, list); > + req_buf->wq_buf_avail = true; > + wake_up(&req_buf->wq_buf); > + list_del(&req_buf->list); > + } > + } > + spin_unlock_irqrestore(&vpmem->pmem_lock, flags); > +} > +EXPORT_SYMBOL_GPL(host_ack); > + > + /* The request submission function */ > +int virtio_pmem_flush(...

...t; + req->done = true; > + wake_up(&req->host_acked); > + > + if (!list_empty(&vpmem->req_list)) { > + req_buf = list_first_entry(&vpmem->req_list, > + struct virtio_pmem_request, list); > + list_del(&vpmem->req_list); > + req_buf->wq_buf_avail = true; > + wake_up(&req_buf->wq_buf); > + } > + } > + spin_unlock_irqrestore(&vpmem->pmem_lock, flags); > +} > +EXPORT_SYMBOL_GPL(host_ack); > + > + /* The request submission function */ > +int virtio_pmem_flush(struct nd_region *nd_region) > +{ >...

..._acked); > > > + > > > + if (!list_empty(&vpmem->req_list)) { > > > + req_buf = list_first_entry(&vpmem->req_list, > > > + struct virtio_pmem_request, list); > > > + list_del(&vpmem->req_list); > > > + req_buf->wq_buf_avail = true; > > > + wake_up(&req_buf->wq_buf); > > > + } > > > + } > > > + spin_unlock_irqrestore(&vpmem->pmem_lock, flags); > > > +} > > > +EXPORT_SYMBOL_GPL(host_ack); > > > + > > > + /* The request submission fu...

..._acked); > > > + > > > + if (!list_empty(&vpmem->req_list)) { > > > + req_buf = list_first_entry(&vpmem->req_list, > > > + struct virtio_pmem_request, list); > > > + list_del(&vpmem->req_list); > > > + req_buf->wq_buf_avail = true; > > > + wake_up(&req_buf->wq_buf); > > > + } > > > + } > > > + spin_unlock_irqrestore(&vpmem->pmem_lock, flags); > > > +} > > > +EXPORT_SYMBOL_GPL(host_ack); > > > + > > > + /* The request submission fu...

This patch series has implementation for "virtio pmem". "virtio pmem" is fake persistent memory(nvdimm) in guest which allows to bypass the guest page cache. This also implements a VIRTIO based asynchronous flush mechanism. Sharing guest kernel driver in this patchset with the changes suggested in v4. Tested with Qemu side device emulation [6] for virtio-pmem.

...; > + req_data->done = true; > > + wake_up(&req_data->host_acked); > > + > > + if (!list_empty(&vpmem->req_list)) { > > + req_buf = list_first_entry(&vpmem->req_list, > > + struct virtio_pmem_request, list); > > + req_buf->wq_buf_avail = true; > > + wake_up(&req_buf->wq_buf); > > + list_del(&req_buf->list); > > + } > > + } > > + spin_unlock_irqrestore(&vpmem->pmem_lock, flags); > > +} > > +EXPORT_SYMBOL_GPL(host_ack); > > Nit: 'host_ack' looks a bi...

...eue_get_buf(vq, &len)) != NULL) { + req->done = true; + wake_up(&req->host_acked); + + if (!list_empty(&vpmem->req_list)) { + req_buf = list_first_entry(&vpmem->req_list, + struct virtio_pmem_request, list); + list_del(&vpmem->req_list); + req_buf->wq_buf_avail = true; + wake_up(&req_buf->wq_buf); + } + } + spin_unlock_irqrestore(&vpmem->pmem_lock, flags); +} +EXPORT_SYMBOL_GPL(host_ack); + + /* The request submission function */ +int virtio_pmem_flush(struct nd_region *nd_region) +{ + int err; + unsigned long flags; + struct scatterlist...