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...(512 bits for 2mb frames). Of course, we could add a way to communicate that we are using a different bitmap-granularity. b) if we really inflate huge memory regions (and it sounds like that according to your measurements), we can minimize the communication to the hypervisor and therefore the madvice calls. c) we don't want to optimize for inflating guests with almost full memory (and therefore little consecutive memory areas) - my opinion :) Thanks for the explanation! -- David

...index 4212b8c91dd4..7d14a7d267aa 100644 > --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c > +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c > @@ -167,6 +167,7 @@ EXPORT_SYMBOL(ttm_bo_vm_reserve); > * @num_prefault: Maximum number of prefault pages. The caller may want to > * specify this based on madvice settings and the size of the GPU object > * backed by the memory. > + * @mkwrite: make the pfn or page writable > * > * This function inserts one or more page table entries pointing to the > * memory backing the buffer object, and then returns a return code > @@ -180,...

> Am 30.11.2016 um 09:43 schrieb Liang Li: > > 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

> Am 30.11.2016 um 09:43 schrieb Liang Li: > > 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

...>>>>> @@ -167,6 +167,7 @@ EXPORT_SYMBOL(ttm_bo_vm_reserve); >> >>>>> * @num_prefault: Maximum number of prefault pages. The caller >> >>>>> may >> >>>> want to >> >>>>> * specify this based on madvice settings and the size of the GPU >> object >> >>>>> * backed by the memory. >> >>>>> + * @mkwrite: make the pfn or page writable >> >>>>> * >> >>>>> * This function inserts one or more page tab...

...t; --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c >>> +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c >>> @@ -167,6 +167,7 @@ EXPORT_SYMBOL(ttm_bo_vm_reserve); >>> * @num_prefault: Maximum number of prefault pages. The caller may >> want to >>> * specify this based on madvice settings and the size of the GPU object >>> * backed by the memory. >>> + * @mkwrite: make the pfn or page writable >>> * >>> * This function inserts one or more page table entries pointing to the >>> * memory backing the buffer object,...

...++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c >>>>> @@ -167,6 +167,7 @@ EXPORT_SYMBOL(ttm_bo_vm_reserve); >>>>> * @num_prefault: Maximum number of prefault pages. The caller >>>>> may >>>> want to >>>>> * specify this based on madvice settings and the size of the GPU object >>>>> * backed by the memory. >>>>> + * @mkwrite: make the pfn or page writable >>>>> * >>>>> * This function inserts one or more page table entries pointing to the >>>>&g...