search for: base_pfn

..., 2016 at 02:52:26PM +0800, Liang Li wrote: > > - /* We should always be able to add one buffer to an empty queue. */ > - virtqueue_add_outbuf(vq, &sg, 1, vb, GFP_KERNEL); > - virtqueue_kick(vq); > +static 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)) { >...

..., 2016 at 02:52:26PM +0800, Liang Li wrote: > > - /* We should always be able to add one buffer to an empty queue. */ > - virtqueue_add_outbuf(vq, &sg, 1, vb, GFP_KERNEL); > - virtqueue_kick(vq); > +static 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)) { >...

On Wed, Jan 18, 2017 at 04:56:58AM +0000, Li, Liang Z wrote: > > > - virtqueue_add_outbuf(vq, &sg, 1, vb, GFP_KERNEL); > > > - virtqueue_kick(vq); > > > +static 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; > > > > > &gt...

On Wed, Jan 18, 2017 at 04:56:58AM +0000, Li, Liang Z wrote: > > > - virtqueue_add_outbuf(vq, &sg, 1, vb, GFP_KERNEL); > > > - virtqueue_kick(vq); > > > +static 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; > > > > > &gt...

...x 256 pages > + */ > +int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages) > +{ > + struct page **pages; > + int *counts; > + int num_allocations; > + int i, j, page_count; > + int order; > + int desired_order; > + int status; > + int ret; > + u64 base_pfn; > + struct hv_deposit_memory *input_page; > + unsigned long flags; > + > + if (num_pages > HV_DEPOSIT_MAX) > + return -EINVAL; > + if (!num_pages) > + return 0; > + > + ret = -ENOMEM; > + > + /* One buffer for page pointers and counts */ > + pages = page_ad...

> > - virtqueue_add_outbuf(vq, &sg, 1, vb, GFP_KERNEL); > > - virtqueue_kick(vq); > > +static 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 << VIRT...

> On Wed, Jan 18, 2017 at 04:56:58AM +0000, Li, Liang Z wrote: > > > > - virtqueue_add_outbuf(vq, &sg, 1, vb, GFP_KERNEL); > > > > - virtqueue_kick(vq); > > > > +static 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; &gt...

...p;len)); + vb->resp_pos = 0; + free_extended_page_bitmap(vb); + } +} - /* We should always be able to add one buffer to an empty queue. */ - virtqueue_add_outbuf(vq, &sg, 1, vb, GFP_KERNEL); - virtqueue_kick(vq); +static 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 c...

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%.

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%.

...one_device(struct zone *zone, * of the pages reserved for the memmap, so we can just jump to * the end of that region and start processing the device pages. */ - if (pgmap->altmap_valid) { - struct vmem_altmap *altmap = &pgmap->altmap; - + if (altmap) { start_pfn = altmap->base_pfn + vmem_altmap_offset(altmap); size = end_pfn - start_pfn; } -- 2.20.1

Hi Dan, Jérôme and Jason, below is a series that cleans up the dev_pagemap interface so that it is more easily usable, which removes the need to wrap it in hmm and thus allowing to kill a lot of code Note: this series is on top of Linux 5.2-rc5 and has some minor conflicts with the hmm tree that are easy to resolve. Diffstat summary: 32 files changed, 361 insertions(+), 1012 deletions(-) Git

Hi Dan, Jérôme and Jason, below is a series that cleans up the dev_pagemap interface so that it is more easily usable, which removes the need to wrap it in hmm and thus allowing to kill a lot of code Note: this series is on top of the rdma/hmm branch + the dev_pagemap releas fix series from Dan that went into 5.2-rc5. Git tree: git://git.infradead.org/users/hch/misc.git