search for: dpage

...>drm; > struct device *dev = drm->dev->dev; > - unsigned long addr, i, npages = 0; > - nouveau_migrate_copy_t copy; > - int ret; > - > - > - /* First allocate new memory */ > - for (addr = start, i = 0; addr < end; addr += PAGE_SIZE, i++) { > - struct page *dpage, *spage; > - > - dst_pfns[i] = 0; > - spage = migrate_pfn_to_page(src_pfns[i]); > - if (!spage || !(src_pfns[i] & MIGRATE_PFN_MIGRATE)) > - continue; > + struct page *dpage, *spage; > > - dpage = alloc_page_vma(GFP_HIGHUSER, vma, addr); > - if (!dpage) { >...

...vm_fault *vmf, struct migrate_vma *args, > + dma_addr_t *dma_addr) > { > - struct nouveau_drm *drm = fault->drm; > struct device *dev = drm->dev->dev; > - unsigned long addr, i, npages = 0; > - nouveau_migrate_copy_t copy; > - int ret; > - > + struct page *dpage, *spage; > + vm_fault_t ret = VM_FAULT_SIGBUS; You can remove this line and return VM_FAULT_SIGBUS in the error path below. > > - /* First allocate new memory */ > - for (addr = start, i = 0; addr < end; addr += PAGE_SIZE, i++) { > - struct page *dpage, *spage; > - > -...

...ult_copy_one(struct nouveau_drm *drm, + struct vm_fault *vmf, struct migrate_vma *args, + dma_addr_t *dma_addr) { - struct nouveau_drm *drm = fault->drm; struct device *dev = drm->dev->dev; - unsigned long addr, i, npages = 0; - nouveau_migrate_copy_t copy; - int ret; - + struct page *dpage, *spage; + vm_fault_t ret = VM_FAULT_SIGBUS; - /* First allocate new memory */ - for (addr = start, i = 0; addr < end; addr += PAGE_SIZE, i++) { - struct page *dpage, *spage; - - dst_pfns[i] = 0; - spage = migrate_pfn_to_page(src_pfns[i]); - if (!spage || !(src_pfns[i] & MIGRATE_PFN_MI...

...a_addr) { - struct nouveau_drm *drm = fault->drm; struct device *dev = drm->dev->dev; - unsigned long addr, i, npages = 0; - nouveau_migrate_copy_t copy; - int ret; - - - /* First allocate new memory */ - for (addr = start, i = 0; addr < end; addr += PAGE_SIZE, i++) { - struct page *dpage, *spage; - - dst_pfns[i] = 0; - spage = migrate_pfn_to_page(src_pfns[i]); - if (!spage || !(src_pfns[i] & MIGRATE_PFN_MIGRATE)) - continue; + struct page *dpage, *spage; - dpage = alloc_page_vma(GFP_HIGHUSER, vma, addr); - if (!dpage) { - dst_pfns[i] = MIGRATE_PFN_ERROR; - continue...

...+552,8 @@ static bool dmirror_allocate_chunk(struct dmirror_device *mdevice, return false; } -static struct page *dmirror_devmem_alloc_page(struct dmirror_device *mdevice) +static struct page *dmirror_devmem_alloc_page(struct dmirror_device *mdevice, + bool is_huge) { struct page *dpage = NULL; struct page *rpage; @@ -542,17 +568,40 @@ static struct page *dmirror_devmem_alloc_page(struct dmirror_device *mdevice) spin_lock(&mdevice->lock); - if (mdevice->free_pages) { + if (is_huge && mdevice->free_huge_pages) { + dpage = mdevice->free_huge_pages; +...

...a_addr) { - struct nouveau_drm *drm = migrate->drm; struct device *dev = drm->dev->dev; - unsigned long addr, i, npages = 0; - nouveau_migrate_copy_t copy; - int ret; - - /* First allocate new memory */ - for (addr = start, i = 0; addr < end; addr += PAGE_SIZE, i++) { - struct page *dpage, *spage; - - dst_pfns[i] = 0; - spage = migrate_pfn_to_page(src_pfns[i]); - if (!spage || !(src_pfns[i] & MIGRATE_PFN_MIGRATE)) - continue; - - dpage = nouveau_dmem_page_alloc_locked(drm); - if (!dpage) - continue; - - dst_pfns[i] = migrate_pfn(page_to_pfn(dpage)) | - MIGRATE_...

..._uvmem.c b/arch/powerpc/kvm/book3s_hv_uvmem.c > index 7705d5557239..e6ec98325fab 100644 > --- a/arch/powerpc/kvm/book3s_hv_uvmem.c > +++ b/arch/powerpc/kvm/book3s_hv_uvmem.c > @@ -711,7 +711,7 @@ static struct page *kvmppc_uvmem_get_page(unsigned long gpa, struct kvm *kvm) > > dpage = pfn_to_page(uvmem_pfn); > dpage->zone_device_data = pvt; > - get_page(dpage); > + init_page_count(dpage); > lock_page(dpage); > return dpage; > out_clear: > diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c b/drivers/gpu/drm/nouveau/nouveau_dmem.c > index 4e811...

...zone_device_data; @@ -169,9 +177,7 @@ nouveau_dmem_fault_alloc_and_copy(struct vm_area_struct *vma, /* Copy things over */ copy = drm->dmem->migrate.copy_func; for (addr = start, i = 0; addr < end; addr += PAGE_SIZE, i++) { - struct nouveau_dmem_chunk *chunk; struct page *spage, *dpage; - u64 src_addr, dst_addr; dpage = migrate_pfn_to_page(dst_pfns[i]); if (!dpage || dst_pfns[i] == MIGRATE_PFN_ERROR) @@ -194,14 +200,10 @@ nouveau_dmem_fault_alloc_and_copy(struct vm_area_struct *vma, continue; } - dst_addr = fault->dma[fault->npages++]; - - chunk = spage-...

Hi Jérôme, Ben and Jason, below is a series against the hmm tree which starts revamping the migrate_vma functionality. The prime idea is to export three slightly lower level functions and thus avoid the need for migrate_vma_ops callbacks. Diffstat: 5 files changed, 281 insertions(+), 607 deletions(-) A git tree is also available at: git://git.infradead.org/users/hch/misc.git

...t a/arch/powerpc/kvm/book3s_hv_uvmem.c b/arch/powerpc/kvm/book3s_hv_uvmem.c index 84e5a2dc8be5..a0d08b1d8c1e 100644 --- a/arch/powerpc/kvm/book3s_hv_uvmem.c +++ b/arch/powerpc/kvm/book3s_hv_uvmem.c @@ -711,7 +711,7 @@ static struct page *kvmppc_uvmem_get_page(unsigned long gpa, struct kvm *kvm) dpage = pfn_to_page(uvmem_pfn); dpage->zone_device_data = pvt; - get_page(dpage); + init_page_count(dpage); lock_page(dpage); return dpage; out_clear: @@ -1151,6 +1151,7 @@ int kvmppc_uvmem_init(void) struct resource *res; void *addr; unsigned long pfn_last, pfn_first; + unsigned long pfn...

This series adds support for transparent huge page migration to migrate_vma_*() and adds nouveau SVM and HMM selftests as consumers. Earlier versions were posted previously [1] and [2]. The patches apply cleanly to the linux-mm 5.10.0-rc2 tree. There are a lot of other THP patches being posted. I don't think there are any semantic conflicts but there may be some merge conflicts depending on

This series adds support for transparent huge page migration to migrate_vma_*() and adds nouveau SVM and HMM selftests as consumers. An earlier version was posted previously [1]. This version now supports splitting a THP midway in the migration process which led to a number of changes. The patches apply cleanly to the current linux-mm tree. Since there are a couple of patches in linux-mm from Dan

Hi Jérôme, Ben and Jason, below is a series against the hmm tree which starts revamping the migrate_vma functionality. The prime idea is to export three slightly lower level functions and thus avoid the need for migrate_vma_ops callbacks. Diffstat: 4 files changed, 285 insertions(+), 602 deletions(-) A git tree is also available at: git://git.infradead.org/users/hch/misc.git

Matthew Wilcox, Ira Weiny, and others have complained that ZONE_DEVICE struct page reference counting is ugly because they are "free" when the reference count is one instead of zero. This leads to explicit checks for ZONE_DEVICE pages in places like put_page(), GUP, THP splitting, and page migration which have to adjust the expected reference count when determining if the page is

...t a/arch/powerpc/kvm/book3s_hv_uvmem.c b/arch/powerpc/kvm/book3s_hv_uvmem.c index 84e5a2dc8be5..a0d08b1d8c1e 100644 --- a/arch/powerpc/kvm/book3s_hv_uvmem.c +++ b/arch/powerpc/kvm/book3s_hv_uvmem.c @@ -711,7 +711,7 @@ static struct page *kvmppc_uvmem_get_page(unsigned long gpa, struct kvm *kvm) dpage = pfn_to_page(uvmem_pfn); dpage->zone_device_data = pvt; - get_page(dpage); + init_page_count(dpage); lock_page(dpage); return dpage; out_clear: @@ -1151,6 +1151,7 @@ int kvmppc_uvmem_init(void) struct resource *res; void *addr; unsigned long pfn_last, pfn_first; + unsigned long pfn...

...ouveau_dmem.c index 6fb65b01d778..097bd3af0719 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dmem.c +++ b/drivers/gpu/drm/nouveau/nouveau_dmem.c @@ -193,7 +193,7 @@ static vm_fault_t nouveau_dmem_migrate_to_ram(struct vm_fault *vmf) if (!spage || !(src & MIGRATE_PFN_MIGRATE)) goto done; - dpage = alloc_page_vma(GFP_HIGHUSER, vmf->vma, vmf->address); + dpage = alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vmf->vma, vmf->address); if (!dpage) goto done; -- 2.34.1

...t a/arch/powerpc/kvm/book3s_hv_uvmem.c b/arch/powerpc/kvm/book3s_hv_uvmem.c index 7705d5557239..e6ec98325fab 100644 --- a/arch/powerpc/kvm/book3s_hv_uvmem.c +++ b/arch/powerpc/kvm/book3s_hv_uvmem.c @@ -711,7 +711,7 @@ static struct page *kvmppc_uvmem_get_page(unsigned long gpa, struct kvm *kvm) dpage = pfn_to_page(uvmem_pfn); dpage->zone_device_data = pvt; - get_page(dpage); + init_page_count(dpage); lock_page(dpage); return dpage; out_clear: diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c b/drivers/gpu/drm/nouveau/nouveau_dmem.c index 4e8112fde3e6..ca2e3c3edc36 100644 --- a/drive...

Hi Jérôme, Ben and Jason, below is a series against the hmm tree which starts revamping the migrate_vma functionality. The prime idea is to export three slightly lower level functions and thus avoid the need for migrate_vma_ops callbacks. Diffstat: 7 files changed, 282 insertions(+), 614 deletions(-) A git tree is also available at: git://git.infradead.org/users/hch/misc.git

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

...t a/arch/powerpc/kvm/book3s_hv_uvmem.c b/arch/powerpc/kvm/book3s_hv_uvmem.c index 84e5a2dc8be5..acee67710620 100644 --- a/arch/powerpc/kvm/book3s_hv_uvmem.c +++ b/arch/powerpc/kvm/book3s_hv_uvmem.c @@ -711,7 +711,7 @@ static struct page *kvmppc_uvmem_get_page(unsigned long gpa, struct kvm *kvm) dpage = pfn_to_page(uvmem_pfn); dpage->zone_device_data = pvt; - get_page(dpage); + init_page_count(dpage); lock_page(dpage); return dpage; out_clear: diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c b/drivers/gpu/drm/nouveau/nouveau_dmem.c index 92987daa5e17..8bc7120e1216 100644 --- a/drive...