search for: queue_flag

...ring initialization). 5.7.1 Device ID 13 5.7.2 Virtqueues 0 receiveq (RX), 1 transmitq (TX) 5.7.3 Feature Bits Possibly VIRTIO_F_MULTICAST (NOT clear yet left out for now) 5.7.4 Device configuration layout struct virtio_peer_config { le64 queue_data_offset; le32 queue_data_size; u8 queue_flags; /* read-only flags*/ u8 queue_window_idr; /* read-only */ u8 queue_window_idw; /* read-only */ } The fields above are queue-specific, and are thus selected by writing to the queue selector field in the common configuration structure. queue_data_offset is the offset from the start of the...

On 09.09.2015 08:40, Zhang, Yang Z wrote: > Claudio Fontana wrote on 2015-09-07: >> Coming late to the party, >> >> On 31.08.2015 16:11, Michael S. Tsirkin wrote: >>> Hello! >>> During the KVM forum, we discussed supporting virtio on top >>> of ivshmem. I have considered it, and came up with an alternative >>> that has several advantages

On 09.09.2015 08:40, Zhang, Yang Z wrote: > Claudio Fontana wrote on 2015-09-07: >> Coming late to the party, >> >> On 31.08.2015 16:11, Michael S. Tsirkin wrote: >>> Hello! >>> During the KVM forum, we discussed supporting virtio on top >>> of ivshmem. I have considered it, and came up with an alternative >>> that has several advantages

...0; return 0; } @@ -260,6 +271,9 @@ /* If barriers are supported, tell block layer that queue is ordered */ if (virtio_has_feature(vdev, VIRTIO_BLK_F_BARRIER)) blk_queue_ordered(vblk->disk->queue, QUEUE_ORDERED_TAG, NULL); + + /* Gather adjacent buffers to minimize sg length. */ + queue_flag_set(QUEUE_FLAG_CLUSTER, vblk->disk->queue); /* If disk is read-only in the host, the guest should obey */ if (virtio_has_feature(vdev, VIRTIO_BLK_F_RO))

...0; return 0; } @@ -260,6 +271,9 @@ /* If barriers are supported, tell block layer that queue is ordered */ if (virtio_has_feature(vdev, VIRTIO_BLK_F_BARRIER)) blk_queue_ordered(vblk->disk->queue, QUEUE_ORDERED_TAG, NULL); + + /* Gather adjacent buffers to minimize sg length. */ + queue_flag_set(QUEUE_FLAG_CLUSTER, vblk->disk->queue); /* If disk is read-only in the host, the guest should obey */ if (virtio_has_feature(vdev, VIRTIO_BLK_F_RO))

...g queuers to allocate up to 50% over the defined * limit of requests, otherwise we could have thousands of requests * allocated with any setting of ->nr_requests */ if (rl->count[is_sync] >= (3 * q->nr_requests / 2)) goto out; @@ -863,137 +834,132 @@ retry: !test_bit(QUEUE_FLAG_ELVSWITCH, &q->queue_flags)) { rw_flags |= REQ_ELVPRIV; rl->elvpriv++; if (et->icq_cache && ioc) icq = ioc_lookup_icq(ioc, q); } if (blk_queue_io_stat(q)) rw_flags |= REQ_IO_STAT; - spin_unlock_irq(q->queue_lock); + + if (drop_lock) + spin_unlock_irq(&...

...g queuers to allocate up to 50% over the defined * limit of requests, otherwise we could have thousands of requests * allocated with any setting of ->nr_requests */ if (rl->count[is_sync] >= (3 * q->nr_requests / 2)) goto out; @@ -863,137 +834,132 @@ retry: !test_bit(QUEUE_FLAG_ELVSWITCH, &q->queue_flags)) { rw_flags |= REQ_ELVPRIV; rl->elvpriv++; if (et->icq_cache && ioc) icq = ioc_lookup_icq(ioc, q); } if (blk_queue_io_stat(q)) rw_flags |= REQ_IO_STAT; - spin_unlock_irq(q->queue_lock); + + if (drop_lock) + spin_unlock_irq(&...

Hi all, These 2 patches added virtio-nvme to kernel and qemu, basically modified from virtio-blk and nvme code. As title said, request for your comments. Play it in Qemu with: -drive file=disk.img,format=raw,if=none,id=D22 \ -device virtio-nvme-pci,drive=D22,serial=1234,num_queues=4 The goal is to have a full NVMe stack from VM guest(virtio-nvme) to host(vhost_nvme) to LIO NVMe-over-fabrics

Hi all, These 2 patches added virtio-nvme to kernel and qemu, basically modified from virtio-blk and nvme code. As title said, request for your comments. Play it in Qemu with: -drive file=disk.img,format=raw,if=none,id=D22 \ -device virtio-nvme-pci,drive=D22,serial=1234,num_queues=4 The goal is to have a full NVMe stack from VM guest(virtio-nvme) to host(vhost_nvme) to LIO NVMe-over-fabrics

...host->max_sectors); + blk_queue_bounce_limit(q, scsi_calculate_bounce_limit(shost)); + blk_queue_segment_boundary(q, shost->dma_boundary); +- blk_queue_issue_flush_fn(q, scsi_issue_flush_fn); +- blk_queue_softirq_done(q, scsi_softirq_done); + + if (!shost->use_clustering) + clear_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags); + return q; + } ++EXPORT_SYMBOL(__scsi_alloc_queue); ++ ++struct request_queue *scsi_alloc_queue(struct scsi_device *sdev) ++{ ++ struct request_queue *q; ++ ++ q = __scsi_alloc_queue(sdev->host, scsi_request_fn); ++ if (!q) ++ return NULL; ++ ++ blk_queue_pre...