search for: pfn_end

...ueue *vq) /* When host has read buffer, this completes via balloon_ack */ wait_event(vb->acked, virtqueue_get_buf(vq, &len)); +} + +static void tell_host_from_page_bmap(struct virtio_balloon *vb, + struct virtqueue *vq, + unsigned long pfn_start, + unsigned long pfn_end, + unsigned int page_bmap_num) +{ + unsigned long i, pfn_num; + for (i = 0; i < page_bmap_num; i++) { + /* + * For the last page_bmap, only the remaining number of pfns + * need to be searched rather than the entire page_bmap. + */ + if (i + 1 == page_bmap_num) + pfn_num = (p...

...buffer, this completes via balloon_ack */ > wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > +} > + > +static void tell_host_from_page_bmap(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long pfn_start, > + unsigned long pfn_end, > + unsigned int page_bmap_num) > +{ > + unsigned long i, pfn_num; > > + for (i = 0; i < page_bmap_num; i++) { > + /* > + * For the last page_bmap, only the remaining number of pfns > + * need to be searched rather than the entire page_bmap. > + */ &g...

...buffer, this completes via balloon_ack */ > wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > +} > + > +static void tell_host_from_page_bmap(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long pfn_start, > + unsigned long pfn_end, > + unsigned int page_bmap_num) > +{ > + unsigned long i, pfn_num; > > + for (i = 0; i < page_bmap_num; i++) { > + /* > + * For the last page_bmap, only the remaining number of pfns > + * need to be searched rather than the entire page_bmap. > + */ &g...

...ueue *vq) /* When host has read buffer, this completes via balloon_ack */ wait_event(vb->acked, virtqueue_get_buf(vq, &len)); +} + +static void tell_host_from_page_bmap(struct virtio_balloon *vb, + struct virtqueue *vq, + unsigned long pfn_start, + unsigned long pfn_end, + unsigned int page_bmap_num) +{ + unsigned long i, pfn_num; + for (i = 0; i < page_bmap_num; i++) { + /* + * For the last page_bmap, only the remaining number of pfns + * need to be searched rather than the entire page_bmap. + */ + if (i + 1 == page_bmap_num) + pfn_num = (p...

...o sgs. + * + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that + * need to be searched. + */ +static void tell_host_sgs(struct virtio_balloon *vb, + struct virtqueue *vq, + unsigned long page_xb_start, + unsigned long page_xb_end) +{ + unsigned long pfn_start, pfn_end; + uint32_t max_len = round_down(UINT_MAX, PAGE_SIZE); + uint64_t len; + + pfn_start = page_xb_start; + while (pfn_start < page_xb_end) { + if (!xb_find_set(&vb->page_xb, page_xb_end, &pfn_start)) + break; + pfn_end = pfn_start + 1; + if (!xb_find_zero(&vb->page_xb, page_x...

This patch series implements the follow two things: 1) Optimization of balloon page transfer: instead of transferring balloon pages to host one by one, the new mechanism transfers them in chunks. 2) A mechanism to report info of guest unused pages: the pages have been unused at some time between when host sent command and when guest reported them. Host uses that by tracking memory changes and

This patch series implements the follow two things: 1) Optimization of balloon page transfer: instead of transferring balloon pages to host one by one, the new mechanism transfers them in chunks. 2) A mechanism to report info of guest unused pages: the pages have been unused at some time between when host sent command and when guest reported them. Host uses that by tracking memory changes and

...xb_end form the range of bits in the xbitmap that > + * need to be searched. > + */ > +static void tell_host_sgs(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long page_xb_start, > + unsigned long page_xb_end) > +{ > + unsigned long pfn_start, pfn_end; > + uint64_t addr; > + uint32_t len, max_len = round_down(UINT_MAX, PAGE_SIZE); > + > + pfn_start = page_xb_start; > + while (pfn_start < page_xb_end) { > + pfn_start = xb_find_next_set_bit(&vb->page_xb, pfn_start, > + page_xb_end); > + if (pfn_start == pa...

...xb_end form the range of bits in the xbitmap that > + * need to be searched. > + */ > +static void tell_host_sgs(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long page_xb_start, > + unsigned long page_xb_end) > +{ > + unsigned long pfn_start, pfn_end; > + uint64_t addr; > + uint32_t len, max_len = round_down(UINT_MAX, PAGE_SIZE); > + > + pfn_start = page_xb_start; > + while (pfn_start < page_xb_end) { > + pfn_start = xb_find_next_set_bit(&vb->page_xb, pfn_start, > + page_xb_end); > + if (pfn_start == pa...

This patch series enhances the existing virtio-balloon with the following new features: 1) fast ballooning: transfer ballooned pages between the guest and host in chunks, instead of one by one; and 2) cmdq: a new virtqueue to send commands between the device and driver. Currently, it supports commands to report memory stats (replace the old statq mechanism) and report guest unused pages. Liang Li

This patch series enhances the existing virtio-balloon with the following new features: 1) fast ballooning: transfer ballooned pages between the guest and host in chunks, instead of one by one; and 2) cmdq: a new virtqueue to send commands between the device and driver. Currently, it supports commands to report memory stats (replace the old statq mechanism) and report guest unused pages. Liang Li

...buffer, this completes via balloon_ack */ > wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > +} > + > +static void tell_host_from_page_bmap(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long pfn_start, > + unsigned long pfn_end, > + unsigned int page_bmap_num) > +{ > + unsigned long i, pfn_num; > > + for (i = 0; i < page_bmap_num; i++) { > + /* > + * For the last page_bmap, only the remaining number of pfns > + * need to be searched rather than the entire page_bmap. > + */ &g...

...buffer, this completes via balloon_ack */ > wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > +} > + > +static void tell_host_from_page_bmap(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long pfn_start, > + unsigned long pfn_end, > + unsigned int page_bmap_num) > +{ > + unsigned long i, pfn_num; > > + for (i = 0; i < page_bmap_num; i++) { > + /* > + * For the last page_bmap, only the remaining number of pfns > + * need to be searched rather than the entire page_bmap. > + */ &g...

...o sgs. + * + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that + * need to be searched. + */ +static void tell_host_sgs(struct virtio_balloon *vb, + struct virtqueue *vq, + unsigned long page_xb_start, + unsigned long page_xb_end) +{ + unsigned long pfn_start, pfn_end; + uint64_t addr; + uint32_t len, max_len = round_down(UINT_MAX, PAGE_SIZE); + + pfn_start = page_xb_start; + while (pfn_start < page_xb_end) { + pfn_start = xb_find_next_set_bit(&vb->page_xb, pfn_start, + page_xb_end); + if (pfn_start == page_xb_end + 1) + break; + pfn_end = x...

...o sgs. + * + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that + * need to be searched. + */ +static void tell_host_sgs(struct virtio_balloon *vb, + struct virtqueue *vq, + unsigned long page_xb_start, + unsigned long page_xb_end) +{ + unsigned long pfn_start, pfn_end; + uint32_t max_len = round_down(UINT_MAX, PAGE_SIZE); + uint64_t len; + + pfn_start = page_xb_start; + while (pfn_start < page_xb_end) { + pfn_start = xb_find_set(&vb->page_xb, page_xb_end + 1, + pfn_start); + if (pfn_start == page_xb_end + 1) + break; + pfn_end = xb_find_zero(&...

...ap) { - if (pgmap->type == MEMORY_DEVICE_PRIVATE && - (!pgmap->ops || !pgmap->ops->page_free)) { - WARN(1, "Missing page_free method\n"); - return -EINVAL; - } - static_branch_inc(&devmap_managed_key); return 0; } @@ -92,13 +86,6 @@ static unsigned long pfn_end(struct dev_pagemap *pgmap, int range_id) return (range->start + range_len(range)) >> PAGE_SHIFT; } -static unsigned long pfn_next(unsigned long pfn) -{ - if (pfn % 1024 == 0) - cond_resched(); - return pfn + 1; -} - /* * This returns true if the page is reserved by ZONE_DEVICE dri...

...gmap) -{ - return -EINVAL; -} -static void devmap_managed_enable_put(void) -{ -} -#endif /* CONFIG_DEV_PAGEMAP_OPS */ - static void pgmap_array_delete(struct resource *res) { xa_store_range(&pgmap_array, PHYS_PFN(res->start), PHYS_PFN(res->end), @@ -90,16 +58,6 @@ static unsigned long pfn_end(struct dev_pagemap *pgmap) return (res->start + resource_size(res)) >> PAGE_SHIFT; } -static unsigned long pfn_next(unsigned long pfn) -{ - if (pfn % 1024 == 0) - cond_resched(); - return pfn + 1; -} - -#define for_each_device_pfn(pfn, map) \ - for (pfn = pfn_first(map); pfn < pfn...

...p) -{ - return -EINVAL; -} -static void devmap_managed_enable_put(void) -{ -} -#endif /* CONFIG_DEV_PAGEMAP_OPS */ - static void pgmap_array_delete(struct range *range) { xa_store_range(&pgmap_array, PHYS_PFN(range->start), PHYS_PFN(range->end), @@ -91,13 +62,6 @@ static unsigned long pfn_end(struct dev_pagemap *pgmap, int range_id) return (range->start + range_len(range)) >> PAGE_SHIFT; } -static unsigned long pfn_next(unsigned long pfn) -{ - if (pfn % 1024 == 0) - cond_resched(); - return pfn + 1; -} - /* * This returns true if the page is reserved by ZONE_DEVICE dri...

...ap) { - if (pgmap->type == MEMORY_DEVICE_PRIVATE && - (!pgmap->ops || !pgmap->ops->page_free)) { - WARN(1, "Missing page_free method\n"); - return -EINVAL; - } - static_branch_inc(&devmap_managed_key); return 0; } @@ -92,13 +86,6 @@ static unsigned long pfn_end(struct dev_pagemap *pgmap, int range_id) return (range->start + range_len(range)) >> PAGE_SHIFT; } -static unsigned long pfn_next(unsigned long pfn) -{ - if (pfn % 1024 == 0) - cond_resched(); - return pfn + 1; -} - /* * This returns true if the page is reserved by ZONE_DEVICE dri...

On 31.10.13 04:34, Miguel Clara wrote: > I was trying to get a core-dump for a domU with xl and got this error: > > # xl dump-core 20 test.core > Memory fault > > GDB shows this: > > a# gdb xl xl.core > GNU gdb (GDB) 7.3.1 > Copyright (C) 2011 Free Software Foundation, Inc. > License GPLv3+: GNU GPL version 3 or later<http://gnu.org/licenses/gpl.html> >