search for: 775,22

...extern unsigned long __get_free_pages(gfp_t gfp_mask, unsigned int order); > extern unsigned long get_zeroed_page(gfp_t gfp_mask); > diff --git a/mm/huge_memory.c b/mm/huge_memory.c > index 25d95f7b1e98..f749633ed350 100644 > --- a/mm/huge_memory.c > +++ b/mm/huge_memory.c > @@ -775,6 +775,22 @@ vm_fault_t do_huge_pmd_anonymous_page(struct vm_fault *vmf) > return __do_huge_pmd_anonymous_page(vmf, page, gfp); > } > > +#ifdef CONFIG_ARCH_ENABLE_THP_MIGRATION > +struct page *alloc_transhugepage(struct vm_area_struct *vma, > + unsigned long haddr) > +{...

...{ + return NULL; +} +#endif extern unsigned long __get_free_pages(gfp_t gfp_mask, unsigned int order); extern unsigned long get_zeroed_page(gfp_t gfp_mask); diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 25d95f7b1e98..f749633ed350 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -775,6 +775,22 @@ vm_fault_t do_huge_pmd_anonymous_page(struct vm_fault *vmf) return __do_huge_pmd_anonymous_page(vmf, page, gfp); } +#ifdef CONFIG_ARCH_ENABLE_THP_MIGRATION +struct page *alloc_transhugepage(struct vm_area_struct *vma, + unsigned long haddr) +{ + gfp_t gfp; + struct page *page;...

...nt virtballoon_migratepage(struct balloon_dev_info *vb_dev_info, { struct virtio_balloon *vb = container_of(vb_dev_info, struct virtio_balloon, vb_dev_info); + bool chunking = virtio_has_feature(vb->vdev, + VIRTIO_BALLOON_F_BALLOON_CHUNKS); unsigned long flags; /* @@ -475,16 +775,22 @@ static int virtballoon_migratepage(struct balloon_dev_info *vb_dev_info, vb_dev_info->isolated_pages--; __count_vm_event(BALLOON_MIGRATE); spin_unlock_irqrestore(&vb_dev_info->pages_lock, flags); - vb->num_pfns = VIRTIO_BALLOON_PAGES_PER_PAGE; - set_page_pfns(vb, vb->pfn...

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

..._info *vb_dev_info, > { > struct virtio_balloon *vb = container_of(vb_dev_info, > struct virtio_balloon, vb_dev_info); > + bool chunking = virtio_has_feature(vb->vdev, > + VIRTIO_BALLOON_F_BALLOON_CHUNKS); > unsigned long flags; > > /* > @@ -475,16 +775,22 @@ static int virtballoon_migratepage(struct balloon_dev_info *vb_dev_info, > vb_dev_info->isolated_pages--; > __count_vm_event(BALLOON_MIGRATE); > spin_unlock_irqrestore(&vb_dev_info->pages_lock, flags); > - vb->num_pfns = VIRTIO_BALLOON_PAGES_PER_PAGE; > - set...

..._info *vb_dev_info, > { > struct virtio_balloon *vb = container_of(vb_dev_info, > struct virtio_balloon, vb_dev_info); > + bool chunking = virtio_has_feature(vb->vdev, > + VIRTIO_BALLOON_F_BALLOON_CHUNKS); > unsigned long flags; > > /* > @@ -475,16 +775,22 @@ static int virtballoon_migratepage(struct balloon_dev_info *vb_dev_info, > vb_dev_info->isolated_pages--; > __count_vm_event(BALLOON_MIGRATE); > spin_unlock_irqrestore(&vb_dev_info->pages_lock, flags); > - vb->num_pfns = VIRTIO_BALLOON_PAGES_PER_PAGE; > - set...

These patches apply to linux-5.8.0-rc1. Patches 1-3 should probably go into 5.8, the others can be queued for 5.9. Patches 4-6 improve the HMM self tests. Patch 7-8 prepare nouveau for the meat of this series which adds support and testing for compound page mapping of system memory (patches 9-11) and compound page migration to device private memory (patches 12-16). Since these changes are split

This series removes some no longer needed stuff from paravirt infrastructure and puts large quantities of paravirt ops under a new config option PARAVIRT_XXL which is selected by XEN_PV only. A pvops kernel without XEN_PV being configured is about 2.5% smaller with this series applied. tip commit 5800dc5c19f34e6e03b5adab1282535cb102fafd ("x86/paravirt: Fix spectre-v2 mitigations for