09316c09dd
Always mark pages with PageBalloon even if balloon compaction is disabled and expose this mark in /proc/kpageflags as KPF_BALLOON. Also this patch adds three counters into /proc/vmstat: "balloon_inflate", "balloon_deflate" and "balloon_migrate". They accumulate balloon activity. Current size of balloon is (balloon_inflate - balloon_deflate) pages. All generic balloon code now gathered under option CONFIG_MEMORY_BALLOON. It should be selected by ballooning driver which wants use this feature. Currently virtio-balloon is the only user. Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@samsung.com> Cc: Rafael Aquini <aquini@redhat.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
57 lines
1.6 KiB
Plaintext
57 lines
1.6 KiB
Plaintext
config VIRTIO
|
|
tristate
|
|
---help---
|
|
This option is selected by any driver which implements the virtio
|
|
bus, such as CONFIG_VIRTIO_PCI, CONFIG_VIRTIO_MMIO, CONFIG_LGUEST,
|
|
CONFIG_RPMSG or CONFIG_S390_GUEST.
|
|
|
|
menu "Virtio drivers"
|
|
|
|
config VIRTIO_PCI
|
|
tristate "PCI driver for virtio devices"
|
|
depends on PCI
|
|
select VIRTIO
|
|
---help---
|
|
This drivers provides support for virtio based paravirtual device
|
|
drivers over PCI. This requires that your VMM has appropriate PCI
|
|
virtio backends. Most QEMU based VMMs should support these devices
|
|
(like KVM or Xen).
|
|
|
|
Currently, the ABI is not considered stable so there is no guarantee
|
|
that this version of the driver will work with your VMM.
|
|
|
|
If unsure, say M.
|
|
|
|
config VIRTIO_BALLOON
|
|
tristate "Virtio balloon driver"
|
|
depends on VIRTIO
|
|
select MEMORY_BALLOON
|
|
---help---
|
|
This driver supports increasing and decreasing the amount
|
|
of memory within a KVM guest.
|
|
|
|
If unsure, say M.
|
|
|
|
config VIRTIO_MMIO
|
|
tristate "Platform bus driver for memory mapped virtio devices"
|
|
depends on HAS_IOMEM
|
|
select VIRTIO
|
|
---help---
|
|
This drivers provides support for memory mapped virtio
|
|
platform device driver.
|
|
|
|
If unsure, say N.
|
|
|
|
config VIRTIO_MMIO_CMDLINE_DEVICES
|
|
bool "Memory mapped virtio devices parameter parsing"
|
|
depends on VIRTIO_MMIO
|
|
---help---
|
|
Allow virtio-mmio devices instantiation via the kernel command line
|
|
or module parameters. Be aware that using incorrect parameters (base
|
|
address in particular) can crash your system - you have been warned.
|
|
See Documentation/kernel-parameters.txt for details.
|
|
|
|
If unsure, say 'N'.
|
|
|
|
endmenu
|