search for: alloc_xenballooned_pages

Add an highmem parameter to alloc_xenballooned_pages, to allow callers to request lowmem or highmem pages. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> --- drivers/xen/balloon.c | 12 ++++++++---- drivers/xen/gntdev.c | 2 +- include/xen/balloon.h | 3 ++- 3 files changed, 11 insertions(+), 6 deletions(-) dif...

Hi Ian/Stefano, So, I''m back to using pfn space from maxphysaddr below. Stefano, you suggested ballooning, but that would be just too slow. There are lot of pages to be mapped, 4k at a time during guest creation, and I am afraid ballooning and hypercalls to populate EPT will be pretty slow. OTOH, there is tons of address space available between max-physaddr and max pfn in dom0. Stefano,

This series implements ballooning for Xen on ARM and builds and Mukesh''s PVH privcmd stuff to implement foreign page mapping on ARM, replacing the old "HACK: initial (very hacky) XENMAPSPACE_gmfn_foreign" patch. The baseline is a bit complex, it is basically Stefano''s xenarm-forlinus branch (commit bbd6eb29214e) merged with Konrad''s linux-next-pvh branch

...struct xenbus_map_node *node; int err; void *addr; + if (nr_grefs > XENBUS_MAX_RING_PAGES) + return -EINVAL; + *vaddr = NULL; node = kzalloc(sizeof(*node), GFP_KERNEL); if (!node) return -ENOMEM; - err = alloc_xenballooned_pages(1, &node->page, false /* lowmem */); + err = alloc_xenballooned_pages(nr_grefs, &node->page, + false /* lowmem */); if (err) goto out_err; addr = pfn_to_kaddr(page_to_pfn(node->page)); - err = xenbus...

...struct xenbus_map_node *node; int err; void *addr; + if (nr_grefs > XENBUS_MAX_RING_PAGES) + return -EINVAL; + *vaddr = NULL; node = kzalloc(sizeof(*node), GFP_KERNEL); if (!node) return -ENOMEM; - err = alloc_xenballooned_pages(1, &node->page, false /* lowmem */); + err = alloc_xenballooned_pages(nr_grefs, &node->page, + false /* lowmem */); if (err) goto out_err; addr = pfn_to_kaddr(page_to_pfn(node->page)); - err = xenbus...

...struct xenbus_map_node *node; int err; void *addr; + if (nr_grefs > XENBUS_MAX_RING_PAGES) + return -EINVAL; + *vaddr = NULL; node = kzalloc(sizeof(*node), GFP_KERNEL); if (!node) return -ENOMEM; - err = alloc_xenballooned_pages(1, &node->page, false /* lowmem */); + err = alloc_xenballooned_pages(nr_grefs, &node->page, + false /* lowmem */); if (err) goto out_err; addr = pfn_to_kaddr(page_to_pfn(node->page)); - err = xenbus...

I think I posted this patch before, but it looks like it was in December 2012 (!). 1/1 libxl: introduce an option for disabling the non-O_DIRECT workaround Ideally it would go into 4.4, at least. Provided the corresponding qemu part has gone into qemu-xen, which I think it has. Can anyone confirm ?