two benefits:
1. Increase the speed of balloon inflate and deflate.
2. Decrease the splitted THPs number in the host.
[1] https://github.com/teawater/linux/tree/balloon_conts
[2] https://github.com/teawater/qemu/tree/balloon_conts
[3] https://lkml.org/lkml/2020/5/13/1211
Hui Zhu (2
This commit adds a vq dcvq to deflate continuous pages.
When VIRTIO_BALLOON_F_CONT_PAGES is set, try to get continuous pages
from icvq and use madvise MADV_WILLNEED with the pages.
Signed-off-by: Hui Zhu
---
hw/virtio/virtio-balloon.c | 14 +-
include/hw/virtio/virtio
This commit adds a new flag VIRTIO_BALLOON_F_CONT_PAGES to virtio_balloon.
Add it adds a vq inflate_cont_vq to inflate continuous pages.
When VIRTIO_BALLOON_F_CONT_PAGES is set, try to allocate continuous pages
and report them use inflate_cont_vq.
Signed-off-by: Hui Zhu
---
drivers/virtio
: Hui Zhu
---
drivers/virtio/virtio_balloon.c| 73
include/linux/balloon_compaction.h | 3 ++
mm/balloon_compaction.c| 76 ++
3 files changed, 144 insertions(+), 8 deletions(-)
diff --git a/drivers/virtio
the pages.
Signed-off-by: Hui Zhu
---
hw/virtio/virtio-balloon.c | 80 -
include/hw/virtio/virtio-balloon.h | 2 +-
include/standard-headers/linux/virtio_balloon.h | 1 +
3 files changed, 55 insertions(+), 28 deletions(-)
diff --git a
kml/2020/5/12/324
[4] https://github.com/teawater/linux/tree/balloon_conts
[5] https://github.com/teawater/qemu/tree/balloon_conts
[6] https://lkml.org/lkml/2020/5/13/1211
Hui Zhu (2):
virtio_balloon: Add VIRTIO_BALLOON_F_CONT_PAGES and inflate_cont_vq
virtio_balloon: Add deflate_cont_vq to
get continuous pages PFN that its order is current_pages_order
from VQ ivq use use madvise MADV_DONTNEED release the page.
This will handle the THP split issue.
Signed-off-by: Hui Zhu
---
hw/virtio/virtio-balloon.c | 77 +
include/hw/virtio/virtio
age.
[1] https://lkml.org/lkml/2020/3/12/144
[2]
https://lore.kernel.org/linux-mm/1584893097-12317-1-git-send-email-teawa...@gmail.com/
Signed-off-by: Hui Zhu
---
drivers/virtio/virtio_balloon.c | 98 +++--
include/linux/balloon_compaction.h | 9 +++-
incl
continuous pages PFN from VQ icvq use use madvise
MADV_DONTNEED release the THP page.
This will handle the THP split issue.
Signed-off-by: Hui Zhu
---
hw/virtio/virtio-balloon.c | 32 +
include/hw/virtio/virtio-balloon.h | 4 +++-
include
kml/2020/3/12/144
Signed-off-by: Hui Zhu
---
drivers/virtio/virtio_balloon.c | 78 ++---
include/linux/balloon_compaction.h | 9 -
include/uapi/linux/virtio_balloon.h | 3 ++
mm/balloon_compaction.c | 40 +++
4 files chan
8b 46 08 83 c3 01 48 8d 50 f8 48 8d 46 08 49 35
This shows that the access is refused and QEMU stops.
[1] https://github.com/teawater/linux/tree/write_balloon
Signed-off-by: Hui Zhu
---
exec.c | 33 +++--
hw/virtio/virtio-balloo
.
Signed-off-by: Hui Zhu
---
hw/virtio/virtio-balloon.c | 67 -
include/standard-headers/linux/virtio_balloon.h | 4 ++
2 files changed, 47 insertions(+), 24 deletions(-)
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index a4729f7
balloon: actual=624
cat /proc/meminfo | grep AnonHugePages:
AnonHugePages:583680 kB
The THP number decreases 384M. This shows that VIRTIO_BALLOON_F_THP_ORDER
can help handle the THP split issue.
Signed-off-by: Hui Zhu
---
drivers/virtio/virtio_balloon.c
Hi,
In qemu 0.11.0, it handle lddqu as:
case 0x3f0: /* lddqu */
if (mod == 3)
goto illegal_op;
gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
gen_sto_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg]));
break;
It st the
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