search for: pfns_per_page_bmap

...ndex f59cb4f..5e2e7cc 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -42,6 +42,10 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) > +#define PFNS_PER_PAGE_BMAP (PAGE_BMAP_SIZE * BITS_PER_BYTE) > +#define PAGE_BMAP_COUNT_MAX 32 > + Please prefix with VIRTIO_BALLOON_ and add comments. > static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > module_param(oom_pages, int, S_IRUSR | S_IWUSR); > MODULE_PARM_DESC(oom_pages, "pages to free o...

...ndex f59cb4f..5e2e7cc 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -42,6 +42,10 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) > +#define PFNS_PER_PAGE_BMAP (PAGE_BMAP_SIZE * BITS_PER_BYTE) > +#define PAGE_BMAP_COUNT_MAX 32 > + Please prefix with VIRTIO_BALLOON_ and add comments. > static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > module_param(oom_pages, int, S_IRUSR | S_IWUSR); > MODULE_PARM_DESC(oom_pages, "pages to free o...

...oon.c b/drivers/virtio/virtio_balloon.c index f59cb4f..4416370 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -42,6 +42,10 @@ #define OOM_VBALLOON_DEFAULT_PAGES 256 #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) +#define PFNS_PER_PAGE_BMAP (PAGE_BMAP_SIZE * BITS_PER_BYTE) +#define PAGE_BMAP_COUNT_MAX 32 + static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; module_param(oom_pages, int, S_IRUSR | S_IWUSR); MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); @@ -50,6 +54,16 @@ MODULE_PARM_DESC(oom_pages, "pages to free...

...oon.c b/drivers/virtio/virtio_balloon.c index f59cb4f..3f4a161 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -42,6 +42,10 @@ #define OOM_VBALLOON_DEFAULT_PAGES 256 #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) +#define PFNS_PER_PAGE_BMAP (PAGE_BMAP_SIZE * BITS_PER_BYTE) +#define PAGE_BMAP_COUNT_MAX 32 + static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; module_param(oom_pages, int, S_IRUSR | S_IWUSR); MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); @@ -50,6 +54,14 @@ MODULE_PARM_DESC(oom_pages, "pages to free...

...on.c b/drivers/virtio/virtio_balloon.c index f59cb4f..5e2e7cc 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -42,6 +42,10 @@ #define OOM_VBALLOON_DEFAULT_PAGES 256 #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) +#define PFNS_PER_PAGE_BMAP (PAGE_BMAP_SIZE * BITS_PER_BYTE) +#define PAGE_BMAP_COUNT_MAX 32 + static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; module_param(oom_pages, int, S_IRUSR | S_IWUSR); MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); @@ -50,6 +54,10 @@ MODULE_PARM_DESC(oom_pages, "pages to free...

...index f59cb4f..4416370 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -42,6 +42,10 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) > +#define PFNS_PER_PAGE_BMAP (PAGE_BMAP_SIZE * BITS_PER_BYTE) > +#define PAGE_BMAP_COUNT_MAX 32 > + > static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > module_param(oom_pages, int, S_IRUSR | S_IWUSR); > MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); > @@ -50,6 +54,16 @@ MODULE_PARM_DESC(...

...index f59cb4f..4416370 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -42,6 +42,10 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) > +#define PFNS_PER_PAGE_BMAP (PAGE_BMAP_SIZE * BITS_PER_BYTE) > +#define PAGE_BMAP_COUNT_MAX 32 > + > static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > module_param(oom_pages, int, S_IRUSR | S_IWUSR); > MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); > @@ -50,6 +54,16 @@ MODULE_PARM_DESC(...

...gt; --- a/drivers/virtio/virtio_balloon.c >> +++ b/drivers/virtio/virtio_balloon.c >> @@ -42,6 +42,10 @@ >> #define OOM_VBALLOON_DEFAULT_PAGES 256 >> #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 >> >> +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) >> +#define PFNS_PER_PAGE_BMAP (PAGE_BMAP_SIZE * BITS_PER_BYTE) >> +#define PAGE_BMAP_COUNT_MAX 32 >> + >> static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; >> module_param(oom_pages, int, S_IRUSR | S_IWUSR); >> MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); >> @@ -50,6...

...RTIO_BALLOON_F_BALLOON_CHUNKS)) { >> + int pfns, page_bmaps, i; >> + unsigned long pfn_start, pfns_len; >> + >> + pfn_start = vb->pfn_start; >> + pfns = vb->pfn_stop - pfn_start + 1; >> + pfns = roundup(roundup(pfns, BITS_PER_LONG), >> + PFNS_PER_PAGE_BMAP); >> + page_bmaps = pfns / PFNS_PER_PAGE_BMAP; >> + pfns_len = pfns / BITS_PER_BYTE; >> + >> + for (i = 0; i < page_bmaps; i++) { >> + unsigned int bmap_len = PAGE_BMAP_SIZE; >> + >> + /* The last one takes the leftover only */ > I don't un...

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 series implements two optimizations: 1) transfer pages in chuncks between the guest and host; 2) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. Changes: v8->v9: 1) Split the two new features, VIRTIO_BALLOON_F_BALLOON_CHUNKS and VIRTIO_BALLOON_F_MISC_VQ, which were mixed together in the previous implementation; 2) Simpler

This patch series implements two optimizations: 1) transfer pages in chuncks between the guest and host; 2) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. Changes: v8->v9: 1) Split the two new features, VIRTIO_BALLOON_F_BALLOON_CHUNKS and VIRTIO_BALLOON_F_MISC_VQ, which were mixed together in the previous implementation; 2) Simpler

...x > f59cb4f..3f4a161 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -42,6 +42,10 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) > +#define PFNS_PER_PAGE_BMAP (PAGE_BMAP_SIZE * BITS_PER_BYTE) > +#define PAGE_BMAP_COUNT_MAX 32 > + > static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > module_param(oom_pages, int, S_IRUSR | S_IWUSR); > MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); @@ -50,6 +54,14 > @@ MODULE_PARM_DESC(oo...

...x > f59cb4f..3f4a161 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -42,6 +42,10 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) > +#define PFNS_PER_PAGE_BMAP (PAGE_BMAP_SIZE * BITS_PER_BYTE) > +#define PAGE_BMAP_COUNT_MAX 32 > + > static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > module_param(oom_pages, int, S_IRUSR | S_IWUSR); > MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); @@ -50,6 +54,14 > @@ MODULE_PARM_DESC(oo...

...; > + int pfns, page_bmaps, i; > > > + unsigned long pfn_start, pfns_len; > > > + > > > + pfn_start = vb->pfn_start; > > > + pfns = vb->pfn_stop - pfn_start + 1; > > > + pfns = roundup(roundup(pfns, BITS_PER_LONG), > > > + PFNS_PER_PAGE_BMAP); > > > + page_bmaps = pfns / PFNS_PER_PAGE_BMAP; > > > + pfns_len = pfns / BITS_PER_BYTE; > > > + > > > + for (i = 0; i < page_bmaps; i++) { > > > + unsigned int bmap_len = PAGE_BMAP_SIZE; > > > + > > > + /* The last one take...

...; > + int pfns, page_bmaps, i; > > > + unsigned long pfn_start, pfns_len; > > > + > > > + pfn_start = vb->pfn_start; > > > + pfns = vb->pfn_stop - pfn_start + 1; > > > + pfns = roundup(roundup(pfns, BITS_PER_LONG), > > > + PFNS_PER_PAGE_BMAP); > > > + page_bmaps = pfns / PFNS_PER_PAGE_BMAP; > > > + pfns_len = pfns / BITS_PER_BYTE; > > > + > > > + for (i = 0; i < page_bmaps; i++) { > > > + unsigned int bmap_len = PAGE_BMAP_SIZE; > > > + > > > + /* The last one take...

This patch series implements two optimizations: 1) transfer pages in chuncks between the guest and host; 2) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. Please read each patch commit log for details. Changes: v7->v8: 1) Use only one chunk format, instead of two. 2) re-write the virtio-balloon implementation patch. 3) commit changes 4)

This patch series implements two optimizations: 1) transfer pages in chuncks between the guest and host; 2) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. Please read each patch commit log for details. Changes: v7->v8: 1) Use only one chunk format, instead of two. 2) re-write the virtio-balloon implementation patch. 3) commit changes 4)

...on.c > > > +++ b/drivers/virtio/virtio_balloon.c > > > @@ -42,6 +42,10 @@ > > > #define OOM_VBALLOON_DEFAULT_PAGES 256 #define > > > VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > > > > > +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) > > > +#define PFNS_PER_PAGE_BMAP (PAGE_BMAP_SIZE * BITS_PER_BYTE) > > > +#define PAGE_BMAP_COUNT_MAX 32 > > > + > > > static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > > > module_param(oom_pages, int, S_IRUSR | S_IWUSR); > > > MODULE_PARM_DESC(oom_pages, "pages to free on OOM&q...