search for: free_page_hint_mem_size

...oon.c index 6b237e3..582a03b 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -43,6 +43,9 @@ #define OOM_VBALLOON_DEFAULT_PAGES 256 #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 +/* The size of memory in bytes allocated for reporting free page hints */ +#define FREE_PAGE_HINT_MEM_SIZE (PAGE_SIZE * 16) + static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; module_param(oom_pages, int, S_IRUSR | S_IWUSR); MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); @@ -51,9 +54,22 @@ MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); static struct vfsmount *balloon...

...--- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -43,6 +43,9 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +/* The size of memory in bytes allocated for reporting free page hints */ > +#define FREE_PAGE_HINT_MEM_SIZE (PAGE_SIZE * 16) > + > static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > module_param(oom_pages, int, S_IRUSR | S_IWUSR); > MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); Doesn't this limit memory size of the guest we can report? Apparently to several gigabyte...

...--- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -43,6 +43,9 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +/* The size of memory in bytes allocated for reporting free page hints */ > +#define FREE_PAGE_HINT_MEM_SIZE (PAGE_SIZE * 16) > + > static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > module_param(oom_pages, int, S_IRUSR | S_IWUSR); > MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); Doesn't this limit memory size of the guest we can report? Apparently to several gigabyte...

...virtio/virtio_balloon.c > > > @@ -43,6 +43,9 @@ > > > #define OOM_VBALLOON_DEFAULT_PAGES 256 #define > > > VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > > > > > +/* The size of memory in bytes allocated for reporting free page > > > +hints */ #define FREE_PAGE_HINT_MEM_SIZE (PAGE_SIZE * 16) > > > + > > > static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > > > module_param(oom_pages, int, S_IRUSR | S_IWUSR); > > > MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); > > > > Doesn't this limit memory size...

...virtio/virtio_balloon.c > > > @@ -43,6 +43,9 @@ > > > #define OOM_VBALLOON_DEFAULT_PAGES 256 #define > > > VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > > > > > +/* The size of memory in bytes allocated for reporting free page > > > +hints */ #define FREE_PAGE_HINT_MEM_SIZE (PAGE_SIZE * 16) > > > + > > > static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > > > module_param(oom_pages, int, S_IRUSR | S_IWUSR); > > > MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); > > > > Doesn't this limit memory size...

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT, implemented by this series enables the virtio-balloon driver to report hints of guest free pages to the host. It can be used to accelerate live migration of VMs. Here is an introduction of this usage: Live migration needs to transfer the VM's

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT, implemented by this series enables the virtio-balloon driver to report hints of guest free pages to the host. It can be used to accelerate live migration of VMs. Here is an introduction of this usage: Live migration needs to transfer the VM's

...oon.c > > +++ b/drivers/virtio/virtio_balloon.c > > @@ -43,6 +43,9 @@ > > #define OOM_VBALLOON_DEFAULT_PAGES 256 #define > > VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > > > +/* The size of memory in bytes allocated for reporting free page > > +hints */ #define FREE_PAGE_HINT_MEM_SIZE (PAGE_SIZE * 16) > > + > > static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > > module_param(oom_pages, int, S_IRUSR | S_IWUSR); > > MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); > > Doesn't this limit memory size of the guest we can report? &g...

...gt; > > @@ -43,6 +43,9 @@ > > > > #define OOM_VBALLOON_DEFAULT_PAGES 256 #define > > > > VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > > > > > > > +/* The size of memory in bytes allocated for reporting free page > > > > +hints */ #define FREE_PAGE_HINT_MEM_SIZE (PAGE_SIZE * 16) > > > > + > > > > static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > > > > module_param(oom_pages, int, S_IRUSR | S_IWUSR); > > > > MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); > > > > > > Doesn&...

...3,9 @@ > > > > > #define OOM_VBALLOON_DEFAULT_PAGES 256 #define > > > > > VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > > > > > > > > > +/* The size of memory in bytes allocated for reporting free page > > > > > +hints */ #define FREE_PAGE_HINT_MEM_SIZE (PAGE_SIZE * 16) > > > > > + > > > > > static int oom_pages = OOM_VBALLOON_DEFAULT_PAGES; > > > > > module_param(oom_pages, int, S_IRUSR | S_IWUSR); > > > > > MODULE_PARM_DESC(oom_pages, "pages to free on OOM"); > > > &...