On Wed, Jul 12, 2017 at 08:40:13PM +0800, Wei Wang wrote: > This patch series enhances the existing virtio-balloon with the following new > features: > 1) fast ballooning: transfer ballooned pages between the guest and host in > chunks using sgs, instead of one by one; and > 2) cmdq: a new virtqueue to send commands between the device and driver. > Currently, it supports commands to report memory stats (replace the old statq > mechanism) and report guest unused pages. Could we get some feedback from mm crowd on patches 6 and 7? > Change Log: > > v11->v12: > 1) xbitmap: use the xbitmap from Matthew Wilcox to record ballooned pages. > 2) virtio-ring: enable the driver to build up a desc chain using vring desc. > 3) virtio-ring: Add locking to the existing START_USE() and END_USE() macro > to lock/unlock the vq when a vq operation starts/ends. > 4) virtio-ring: add virtqueue_kick_sync() and virtqueue_kick_async() > 5) virtio-balloon: describe chunks of ballooned pages and free pages blocks > directly using one or more chains of desc from the vq. > > v10->v11: > 1) virtio_balloon: use vring_desc to describe a chunk; > 2) virtio_ring: support to add an indirect desc table to virtqueue; > 3) virtio_balloon: use cmdq to report guest memory statistics. > > v9->v10: > 1) mm: put report_unused_page_block() under CONFIG_VIRTIO_BALLOON; > 2) virtio-balloon: add virtballoon_validate(); > 3) virtio-balloon: msg format change; > 4) virtio-balloon: move miscq handling to a task on system_freezable_wq; > 5) virtio-balloon: code cleanup. > > 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 function to get the free page block. > > v7->v8: > 1) Use only one chunk format, instead of two. > 2) re-write the virtio-balloon implementation patch. > 3) commit changes > 4) patch re-org > > Liang Li (1): > virtio-balloon: deflate via a page list > > Matthew Wilcox (1): > Introduce xbitmap > > Wei Wang (6): > virtio-balloon: coding format cleanup > xbitmap: add xb_find_next_bit() and xb_zero() > virtio-balloon: VIRTIO_BALLOON_F_SG > mm: support reporting free page blocks > mm: export symbol of next_zone and first_online_pgdat > virtio-balloon: VIRTIO_BALLOON_F_CMD_VQ > > drivers/virtio/virtio_balloon.c | 414 ++++++++++++++++++++++++++++++++---- > drivers/virtio/virtio_ring.c | 224 +++++++++++++++++-- > include/linux/mm.h | 5 + > include/linux/radix-tree.h | 2 + > include/linux/virtio.h | 22 ++ > include/linux/xbitmap.h | 53 +++++ > include/uapi/linux/virtio_balloon.h | 11 + > lib/radix-tree.c | 164 +++++++++++++- > mm/mmzone.c | 2 + > mm/page_alloc.c | 96 +++++++++ > 10 files changed, 926 insertions(+), 67 deletions(-) > create mode 100644 include/linux/xbitmap.h > > -- > 2.7.4
