search for: sg_out

...ist. > @@ -373,6 +378,49 @@ static void update_balloon_stats(struct virtio_balloon *vb) > pages_to_bytes(available)); > } > > +static void update_free_pages_stats(struct virtio_balloon *vb, why _stats? > + unsigned long req_id) > +{ > + struct scatterlist sg_in, sg_out; > + unsigned long pfn = 0, bmap_len, max_pfn; > + struct virtqueue *vq = vb->misc_vq; > + struct balloon_bmap_hdr *hdr = vb->bmap_hdr; > + int ret = 1; > + > + max_pfn = get_max_pfn(); > + mutex_lock(&vb->balloon_lock); > + while (pfn < max_pfn) { > + me...

...ist. > @@ -373,6 +378,49 @@ static void update_balloon_stats(struct virtio_balloon *vb) > pages_to_bytes(available)); > } > > +static void update_free_pages_stats(struct virtio_balloon *vb, why _stats? > + unsigned long req_id) > +{ > + struct scatterlist sg_in, sg_out; > + unsigned long pfn = 0, bmap_len, max_pfn; > + struct virtqueue *vq = vb->misc_vq; > + struct balloon_bmap_hdr *hdr = vb->bmap_hdr; > + int ret = 1; > + > + max_pfn = get_max_pfn(); > + mutex_lock(&vb->balloon_lock); > + while (pfn < max_pfn) { > + me...

.../----------------------------------------------------------------------------- + +static ssize_t +virtio_buf_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + char tmp_buf[MAX_DATA_SIZE]; + int retval; + struct scatterlist sg_in, sg_out; + struct scatterlist *request[2]; + /* cast dev into a virtio_device */ + struct virtio_device *vdev = dev_to_virtio(dev); + struct virtexample_info *vi = vdev->priv; + + /* copy the user buffer since it is a const buffer */ + sprintf(tmp_buf, "%s", buf); + + /* convert...

...not using are enqueued * at vb_dev_info->pages list. @@ -373,6 +378,49 @@ static void update_balloon_stats(struct virtio_balloon *vb) pages_to_bytes(available)); } +static void update_free_pages_stats(struct virtio_balloon *vb, + unsigned long req_id) +{ + struct scatterlist sg_in, sg_out; + unsigned long pfn = 0, bmap_len, max_pfn; + struct virtqueue *vq = vb->misc_vq; + struct balloon_bmap_hdr *hdr = vb->bmap_hdr; + int ret = 1; + + max_pfn = get_max_pfn(); + mutex_lock(&vb->balloon_lock); + while (pfn < max_pfn) { + memset(vb->page_bitmap, 0, vb->bmap_len);...

...mit > max_pfn) > > + bmap_len = (max_pfn - pfn) / > BITS_PER_BYTE; > > + } else > > + hdr->flag = cpu_to_virtio16(vb->vdev, > > + > BALLOON_FLAG_CONT); > > + hdr->bmap_len = cpu_to_virtio64(vb->vdev, bmap_len); > > + sg_init_one(&sg_out, hdr, > > + sizeof(struct balloon_bmap_hdr) + bmap_len); > > Wait a second. This adds the same buffer multiple times in a loop. > We will overwrite the buffer without waiting for hypervisor to process it. > What did I miss? I am no quite sure about this part, I though the vir...

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.

This patchset is for kernel and contains two parts of change to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by

This patchset is for kernel and contains two parts of change to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.