search for: resp_pos

...struct virtio_balloon_resp_hdr resp_hdr; >> + /* Pointer to the start address of response data. */ >> + __le64 *resp_data; >> + /* Size of response data buffer. */ >> + unsigned int resp_buf_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, star...

...sponse header. */ > + struct virtio_balloon_resp_hdr resp_hdr; > + /* Pointer to the start address of response data. */ > + __le64 *resp_data; > + /* Size of response data buffer. */ > + unsigned int resp_buf_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; > /...

...sponse header. */ > + struct virtio_balloon_resp_hdr resp_hdr; > + /* Pointer to the start address of response data. */ > + __le64 *resp_data; > + /* Size of response data buffer. */ > + unsigned int resp_buf_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; > /...

...t num_pages; + /* Pointer to the response header. */ + struct virtio_balloon_resp_hdr resp_hdr; + /* Pointer to the start address of response data. */ + __le64 *resp_data; + /* Size of response data buffer. */ + unsigned int resp_buf_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...

...atic void do_set_resp_bitmap(struct virtio_balloon *vb, > + unsigned long base_pfn, int pages) > > - /* When host has read buffer, this completes via balloon_ack */ > - wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > +{ > + __le64 *range = vb->resp_data + vb->resp_pos; > > + if (pages > (1 << VIRTIO_BALLOON_NR_PFN_BITS)) { > + /* when the length field can't contain pages, set it to 0 to /* * Multi-line * comments * should look like this. */ Also, pls start sentences with an upper-case letter. > + * indicate the actual length...

...atic void do_set_resp_bitmap(struct virtio_balloon *vb, > + unsigned long base_pfn, int pages) > > - /* When host has read buffer, this completes via balloon_ack */ > - wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > +{ > + __le64 *range = vb->resp_data + vb->resp_pos; > > + if (pages > (1 << VIRTIO_BALLOON_NR_PFN_BITS)) { > + /* when the length field can't contain pages, set it to 0 to /* * Multi-line * comments * should look like this. */ Also, pls start sentences with an upper-case letter. > + * indicate the actual length...

...t using. */ unsigned int num_pages; + /* Pointer to the response header. */ + void *resp_hdr; + /* Pointer to the start address of response data. */ + __le64 *resp_data; + /* Size of response data buffer. */ + unsigned int resp_buf_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...

...t; > > + unsigned long base_pfn, int pages) > > > > > > - /* When host has read buffer, this completes via balloon_ack */ > > > - wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > > > +{ > > > + __le64 *range = vb->resp_data + vb->resp_pos; > > > > > > + if (pages > (1 << VIRTIO_BALLOON_NR_PFN_BITS)) { > > > + /* when the length field can't contain pages, set it to 0 to > > > > /* > > * Multi-line > > * comments > > * should look like this. > > */ >...

...t; > > + unsigned long base_pfn, int pages) > > > > > > - /* When host has read buffer, this completes via balloon_ack */ > > > - wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > > > +{ > > > + __le64 *range = vb->resp_data + vb->resp_pos; > > > > > > + if (pages > (1 << VIRTIO_BALLOON_NR_PFN_BITS)) { > > > + /* when the length field can't contain pages, set it to 0 to > > > > /* > > * Multi-line > > * comments > > * should look like this. > > */ >...

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

...pages; + /* Pointer to the response header. */ + struct virtio_balloon_resp_hdr *resp_hdr; + /* Pointer to the start address of response data. */ + resp_data_t *resp_data; + /* Size of response data buffer. */ + unsigned int resp_buf_size; + /* Pointer offset of the response data. */ + unsigned int resp_pos; + /* Bitmap used to record pages */ + unsigned long *page_bmap[PAGE_BMAP_COUNT_MAX]; + /* Number of split page bmaps */ + unsigned int page_bmaps; + + /* + * The allocated page_bmap size may be smaller than the pfn range of + * the ballooned pages. In this case, we need to use the page_bmap + *...

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%.

...(struct virtio_balloon *vb, > > + unsigned long base_pfn, int pages) > > > > - /* When host has read buffer, this completes via balloon_ack */ > > - wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > > +{ > > + __le64 *range = vb->resp_data + vb->resp_pos; > > > > + if (pages > (1 << VIRTIO_BALLOON_NR_PFN_BITS)) { > > + /* when the length field can't contain pages, set it to 0 to > > /* > * Multi-line > * comments > * should look like this. > */ > > Also, pls start sentences with an upper...

...long base_pfn, int pages) > > > > > > > > - /* When host has read buffer, this completes via balloon_ack */ > > > > - wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > > > > +{ > > > > + __le64 *range = vb->resp_data + vb->resp_pos; > > > > > > > > + if (pages > (1 << VIRTIO_BALLOON_NR_PFN_BITS)) { > > > > + /* when the length field can't contain pages, set it to 0 to > > > > > > /* > > > * Multi-line > > > * comments > > > * sho...

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 {pfn|length} to present the page information 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 {pfn|length} to present the page information 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%.