Igor Redko 37e62218c3 mm/page_alloc.c: calculate 'available' memory in a separate function ... commit d02bd27bd33dd7e8d22594cd568b81be0cb584cd upstream. Add a new field, VIRTIO_BALLOON_S_AVAIL, to virtio_balloon memory statistics protocol, corresponding to 'Available' in /proc/meminfo. It indicates to the hypervisor how big the balloon can be inflated without pushing the guest system to swap. This metric would be very useful in VM orchestration software to improve memory management of different VMs under overcommit. This patch (of 2): Factor out calculation of the available memory counter into a separate exportable function, in order to be able to use it in other parts of the kernel. In particular, it appears a relevant metric to report to the hypervisor via virtio-balloon statistics interface (in a followup patch). Signed-off-by: Igor Redko <redkoi@virtuozzo.com> Signed-off-by: Denis V. Lunev <den@openvz.org> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> Cc: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> [bwh: Backported to 4.4 as dependency of commit a1078e821b60 "xen: let alloc_xenballooned_pages() fail if not enough memory free"] Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Change-Id: Ib8cae94ddd9742752ecc795129be642c57f8cc15		2020-12-01 19:08:20 +01:00
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acpi
asm-generic	asm-generic: add memfd_create system call to unistd.h	2019-10-23 11:26:04 +02:00
crypto
drm
keys
linux	mm/page_alloc.c: calculate 'available' memory in a separate function	2020-12-01 19:08:20 +01:00
math-emu
media
misc
mtd
net	netfilter updates for net-next (batch 3)	2019-01-03 13:59:01 +01:00
pcmcia
rdma
rxrpc
scsi
sound
target
trace
uapi/linux	shm: add memfd_create() syscall	2019-10-23 11:26:11 +02:00
video
xen
Kbuild