diff options
| author | Fam Zheng <famz@redhat.com> | 2014-09-23 15:49:28 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-09-30 11:11:20 +0200 |
| commit | 1880ad4f4e3b49f15c55e816d66b9690b3ede00c (patch) | |
| tree | f02488a1e153e469f00ac5c4527c0f6ba005d3cb /hw/scsi/virtio-scsi-dataplane.c | |
| parent | 359eea71d98e7f2cf9efb5e65bb59a240bedb131 (diff) | |
virtio-scsi: Batched prepare for cmd reqs
Queue the popped requests while calling
virtio_scsi_handle_cmd_req_prepare(), then submit them after all
prepared.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/scsi/virtio-scsi-dataplane.c')
| -rw-r--r-- | hw/scsi/virtio-scsi-dataplane.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/hw/scsi/virtio-scsi-dataplane.c b/hw/scsi/virtio-scsi-dataplane.c index 11f5705407..b778e051f8 100644 --- a/hw/scsi/virtio-scsi-dataplane.c +++ b/hw/scsi/virtio-scsi-dataplane.c @@ -122,14 +122,19 @@ static void virtio_scsi_iothread_handle_cmd(EventNotifier *notifier) VirtIOSCSIVring *vring = container_of(notifier, VirtIOSCSIVring, host_notifier); VirtIOSCSI *s = (VirtIOSCSI *)vring->parent; - VirtIOSCSIReq *req; + VirtIOSCSIReq *req, *next; + QTAILQ_HEAD(, VirtIOSCSIReq) reqs = QTAILQ_HEAD_INITIALIZER(reqs); event_notifier_test_and_clear(notifier); while ((req = virtio_scsi_pop_req_vring(s, vring))) { if (virtio_scsi_handle_cmd_req_prepare(s, req)) { - virtio_scsi_handle_cmd_req_submit(s, req); + QTAILQ_INSERT_TAIL(&reqs, req, next); } } + + QTAILQ_FOREACH_SAFE(req, &reqs, next, next) { + virtio_scsi_handle_cmd_req_submit(s, req); + } } /* Context: QEMU global mutex held */ |