search for: min_pfn

...s; > + /* Pointer of the bitmap header. */ > + void *bmap_hdr; > + /* Bitmap and bitmap count used to tell the host the pages */ > + unsigned long *page_bitmap[BALLOON_BMAP_COUNT]; > + unsigned int nr_page_bmap; > + /* Used to record the processed pfn range */ > + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; > /* > * The pages we've told the Host we're not using are enqueued > * at vb_dev_info->pages list. > @@ -110,16 +121,66 @@ static void balloon_ack(struct virtqueue *vq) > wake_up(&vb->acked); > } > > +static inlin...

...s; > + /* Pointer of the bitmap header. */ > + void *bmap_hdr; > + /* Bitmap and bitmap count used to tell the host the pages */ > + unsigned long *page_bitmap[BALLOON_BMAP_COUNT]; > + unsigned int nr_page_bmap; > + /* Used to record the processed pfn range */ > + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; > /* > * The pages we've told the Host we're not using are enqueued > * at vb_dev_info->pages list. > @@ -110,16 +121,66 @@ static void balloon_ack(struct virtqueue *vq) > wake_up(&vb->acked); > } > > +static inlin...

...unsigned int resp_pos; >> + /* Bitmap used to save the pfns info */ >> + unsigned long *page_bitmap[PAGE_BMAP_COUNT_MAX]; >> + /* Number of split page bitmaps */ >> + unsigned int nr_page_bmap; >> + /* Used to record the processed pfn range */ >> + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; >> /* >> * The pages we've told the Host we're not using are enqueued >> * at vb_dev_info->pages list. >> @@ -110,20 +138,180 @@ static void balloon_ack(struct virtqueue *vq) >> wake_up(&vb->acked); >>...

...t using. */ unsigned int num_pages; + /* Pointer of the bitmap header. */ + void *bmap_hdr; + /* Bitmap and bitmap count used to tell the host the pages */ + unsigned long *page_bitmap[BALLOON_BMAP_COUNT]; + unsigned int nr_page_bmap; + /* Used to record the processed pfn range */ + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; /* * The pages we've told the Host we're not using are enqueued * at vb_dev_info->pages list. @@ -110,16 +121,66 @@ static void balloon_ack(struct virtqueue *vq) wake_up(&vb->acked); } +static inline void init_pfn_range(struct virtio_ball...

...t using. */ unsigned int num_pages; + /* Pointer of the bitmap header. */ + void *bmap_hdr; + /* Bitmap and bitmap count used to tell the host the pages */ + unsigned long *page_bitmap[BALLOON_BMAP_COUNT]; + unsigned int nr_page_bmap; + /* Used to record the processed pfn range */ + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; /* * The pages we've told the Host we're not using are enqueued * at vb_dev_info->pages list. @@ -110,16 +121,66 @@ static void balloon_ack(struct virtqueue *vq) wake_up(&vb->acked); } +static inline void init_pfn_range(struct virtio_ball...

...uf_size; + /* Pointer offset of the response data. */ + unsigned int resp_pos; + /* Bitmap used to save the pfns info */ + unsigned long *page_bitmap[BALLOON_BMAP_COUNT]; + /* Number of split page bitmaps */ + unsigned int nr_page_bmap; + /* Used to record the processed pfn range */ + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; /* * The pages we've told the Host we're not using are enqueued * at vb_dev_info->pages list. @@ -110,20 +128,180 @@ static void balloon_ack(struct virtqueue *vq) wake_up(&vb->acked); } -static void tell_host(struct virtio_balloon *vb, st...

...signed int num_pages; + /* Pointer of the bitmap header. */ + void *bmap_hdr; + /* Bitmap and length used to tell the host the pages */ + unsigned long *page_bitmap; + unsigned long bmap_len; + /* Pfn limit */ + unsigned long pfn_limit; + /* Used to record the processed pfn range */ + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; /* * The pages we've told the Host we're not using are enqueued * at vb_dev_info->pages list. @@ -105,12 +132,45 @@ static void balloon_ack(struct virtqueue *vq) wake_up(&vb->acked); } +static inline void init_pfn_range(struct virtio_ball...

...response data. */ > + unsigned int resp_pos; > + /* Bitmap used to save the pfns info */ > + unsigned long *page_bitmap[PAGE_BMAP_COUNT_MAX]; > + /* Number of split page bitmaps */ > + unsigned int nr_page_bmap; > + /* Used to record the processed pfn range */ > + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; > /* > * The pages we've told the Host we're not using are enqueued > * at vb_dev_info->pages list. > @@ -110,20 +138,180 @@ static void balloon_ack(struct virtqueue *vq) > wake_up(&vb->acked); > } > > -static void...

...response data. */ > + unsigned int resp_pos; > + /* Bitmap used to save the pfns info */ > + unsigned long *page_bitmap[PAGE_BMAP_COUNT_MAX]; > + /* Number of split page bitmaps */ > + unsigned int nr_page_bmap; > + /* Used to record the processed pfn range */ > + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; > /* > * The pages we've told the Host we're not using are enqueued > * at vb_dev_info->pages list. > @@ -110,20 +138,180 @@ static void balloon_ack(struct virtqueue *vq) > wake_up(&vb->acked); > } > > -static void...

...f_size; + /* Pointer offset of the response data. */ + unsigned int resp_pos; + /* Bitmap used to save the pfns info */ + unsigned long *page_bitmap[PAGE_BMAP_COUNT_MAX]; + /* Number of split page bitmaps */ + unsigned int nr_page_bmap; + /* Used to record the processed pfn range */ + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; /* * The pages we've told the Host we're not using are enqueued * at vb_dev_info->pages list. @@ -110,20 +138,180 @@ static void balloon_ack(struct virtqueue *vq) wake_up(&vb->acked); } -static void tell_host(struct virtio_balloon *vb, st...

...e bitmap header. */ > + void *bmap_hdr; > + /* Bitmap and length used to tell the host the pages */ > + unsigned long *page_bitmap; > + unsigned long bmap_len; > + /* Pfn limit */ > + unsigned long pfn_limit; > + /* Used to record the processed pfn range */ > + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; > /* > * The pages we've told the Host we're not using are enqueued > * at vb_dev_info->pages list. > @@ -105,12 +132,45 @@ static void balloon_ack(struct virtqueue *vq) > wake_up(&vb->acked); > } > > +static inlin...

...e bitmap header. */ > + void *bmap_hdr; > + /* Bitmap and length used to tell the host the pages */ > + unsigned long *page_bitmap; > + unsigned long bmap_len; > + /* Pfn limit */ > + unsigned long pfn_limit; > + /* Used to record the processed pfn range */ > + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; > /* > * The pages we've told the Host we're not using are enqueued > * at vb_dev_info->pages list. > @@ -105,12 +132,45 @@ static void balloon_ack(struct virtqueue *vq) > wake_up(&vb->acked); > } > > +static inlin...

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

...e bitmap header. */ > + void *bmap_hdr; > + /* Bitmap and length used to tell the host the pages */ > + unsigned long *page_bitmap; > + unsigned long bmap_len; > + /* Pfn limit */ > + unsigned long pfn_limit; > + /* Used to record the processed pfn range */ > + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; > /* > * The pages we've told the Host we're not using are enqueued > * at vb_dev_info->pages list. > @@ -105,12 +132,45 @@ static void balloon_ack(struct virtqueue *vq) > wake_up(&vb->acked); > } > > +static inlin...

...e bitmap header. */ > + void *bmap_hdr; > + /* Bitmap and length used to tell the host the pages */ > + unsigned long *page_bitmap; > + unsigned long bmap_len; > + /* Pfn limit */ > + unsigned long pfn_limit; > + /* Used to record the processed pfn range */ > + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; > /* > * The pages we've told the Host we're not using are enqueued > * at vb_dev_info->pages list. > @@ -105,12 +132,45 @@ static void balloon_ack(struct virtqueue *vq) > wake_up(&vb->acked); > } > > +static inlin...

Take over this work from Liang. This patch series implements two optimizations: 1) transfer pages in chuncks between the guest and host; 1) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. Please check patch 0003 for more details about optimization 1). For an idle guest with 8GB RAM, optimization 2) can help shorten the total live migration

Take over this work from Liang. This patch series implements two optimizations: 1) transfer pages in chuncks between the guest and host; 1) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. Please check patch 0003 for more details about optimization 1). For an idle guest with 8GB RAM, optimization 2) can help shorten the total live migration

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%.