add config files

4 files changed, 100 insertions, 6 deletions

diff --git a/.SRCINFO b/.SRCINFO
index 1b4269326861..ac2b4eec914d 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,16 +1,18 @@
-# Generated by mksrcinfo v8
-# 六 5月 12 17:00:39 UTC 2018
 pkgbase = mom
 	pkgdesc = Memory Overcommitment Manager, for virtual machines
 	pkgver = 0.5.12
-	pkgrel = 1
+	pkgrel = 2
 	url = https://gerrit.ovirt.org/#/admin/projects/mom
 	arch = x86_64
 	license = GPL2
 	makedepends = git
 	depends = python2
 	source = git+https://gerrit.ovirt.org/mom#tag=v0.5.12
+	source = momd@.service
+	source = balloon.rules
 	md5sums = SKIP
+	md5sums = c2b7bf62ee32aee64e127f4384767235
+	md5sums = cf66caf6eec15c39381abf28235aa0ed
 
 pkgname = mom
 
diff --git a/PKGBUILD b/PKGBUILD
index 0b10a9ef0632..9ea378fb6858 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -2,15 +2,19 @@
 
 pkgname=mom
 pkgver=0.5.12
-pkgrel=1
+pkgrel=2
 pkgdesc="Memory Overcommitment Manager, for virtual machines"
 arch=('x86_64')
 url="https://gerrit.ovirt.org/#/admin/projects/mom"
 license=("GPL2")
 depends=('python2')
 makedepends=('git')
-source=("git+https://gerrit.ovirt.org/mom#tag=v${pkgver}")
-md5sums=('SKIP')
+source=("git+https://gerrit.ovirt.org/mom#tag=v${pkgver}"
+        "momd@.service"
+        "balloon.rules")
+md5sums=('SKIP'
+         'c2b7bf62ee32aee64e127f4384767235'
+         'cf66caf6eec15c39381abf28235aa0ed')
 
 prepare() {
     cd mom
@@ -25,6 +29,10 @@ build() {
 }
 
 package() {
+    install -Dm644 momd@.service "${pkgdir}/usr/lib/systemd/system/momd@.service"
+    install -Dm644 balloon.rules "${pkgdir}/etc/mom/balloon.rules"
     cd mom
     make DESTDIR="${pkgdir}" install
+    install -Dm644 doc/mom-balloon+ksm.conf "${pkgdir}/etc/mom/mom.conf"
+    sed -i 's/guest-manager-multi-thread:/guest-manager-multi-thread: true/' "${pkgdir}/etc/mom/mom.conf"
 }
diff --git a/balloon.rules b/balloon.rules
new file mode 100644
index 000000000000..f1c3ccbe8d2f
--- /dev/null
+++ b/balloon.rules
@@ -0,0 +1,71 @@
+### Auto-Balloon ###############################################################
+# Author: Jianfeng Zhang <swordfeng123@gmail.com>
+
+# Basic idea: make guest pressure equal to host pressure
+# Host pressure = min(1, max(0, (host_used - host_free_threshold) / (host_free_critical - host_free_threshold)))
+# Guest pressure = min(1, guest_visually_used / (1 - guest_free_critical))
+
+# Lower bound (%) of host pressure
+(defvar host_free_threshold 0.8)
+# Upper bound (%) of host pressure
+(defvar host_free_critical 0.1)
+# Lower bound of guest pressure is 0.
+# Upper bound (%) of guest pressure
+(defvar guest_free_critical 0.1)
+
+# Change of these values will change the speed and sensitivity of adjustments
+(defvar max_balloon_change_percent 0.1)
+(defvar min_balloon_change_percent 0.005)
+
+(defvar host_free_percent (/ (Host.StatAvg "mem_free") Host.mem_available))
+
+(def adjust_guest (guest)
+{
+    (defvar guest_mem_used (- guest.balloon_cur guest.mem_unused))
+    (debug "host_usage" (- 1 host_free_percent) "guest_usage" (/ (* 1.0 guest_mem_used) Host.mem_available))
+    (debug "guest_used" guest_mem_used "guest_free" guest.mem_unused "ballooned" (- guest.mem_available guest.balloon_cur))
+
+    (defvar guest_free (+ (guest.StatAvg "mem_unused") (- guest.mem_available (guest.StatAvg "balloon_cur"))))
+    (defvar guest_free_percent (/ guest_free guest.mem_available))
+    (defvar guest_free_visible (/ (guest.StatAvg "mem_unused") guest.mem_available))
+
+    (defvar host_freedom (/ (- host_free_percent host_free_critical)
+                            (- host_free_threshold host_free_critical)))
+    (defvar guest_freedom (/ (- guest_free_visible guest_free_critical)
+                             (- guest_free_percent guest_free_critical)))
+    (debug "host_pressure" (- 1 host_freedom) "guest_pressure" (- 1 guest_freedom))
+
+    (defvar guest_avail (* guest.mem_available (- guest_free_percent guest_free_critical)))
+    (defvar host_avail (* Host.mem_available (- host_free_threshold host_free_critical)))
+    (defvar delta (/ (* (* (- host_freedom guest_freedom) guest_avail) host_avail)
+                     (+ guest_avail host_avail)))
+
+    (defvar guest_free_target
+            (if (or (<= host_free_percent host_free_critical) (<= guest_free_percent guest_free_critical))
+                guest_free_critical
+                (+ guest_free_visible (/ delta guest.mem_available))
+            )
+    )
+
+    # Target guest visible usage
+    (debug "guest_visible_use_target" (- 1 guest_free_target))
+    (defvar balloon_size (* guest.mem_available
+                            (- 1 (- guest_free_percent guest_free_target))))
+    (if (> balloon_size guest.balloon_max)
+        (set balloon_size guest.balloon_max)
+        0)
+    (defvar balloon_adjust (- balloon_size guest.balloon_cur))
+    (defvar max_change (* max_balloon_change_percent guest.mem_available))
+    (defvar min_change (* min_balloon_change_percent guest.mem_available))
+    (if (< balloon_adjust (- 0 max_change))
+        (set balloon_size (- guest.balloon_cur max_change))
+        0)
+    (if (> balloon_adjust max_change)
+        (set balloon_size (+ guest.balloon_cur max_change))
+        0)
+    (if (or (< balloon_adjust (- 0 min_change)) (> balloon_adjust min_change))
+        (guest.Control "balloon_target" balloon_size)
+        0)
+})
+
+(with Guests guest (adjust_guest guest))
diff --git a/momd@.service b/momd@.service
new file mode 100644
index 000000000000..69e365e6ed40
--- /dev/null
+++ b/momd@.service
@@ -0,0 +1,13 @@
+[Unit]
+Description=Memory Overcommitment Manager
+After=network.target
+After=libvirtd.service
+Requires=libvirtd.service
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/momd -c /etc/mom/mom.conf -r /etc/mom/%i.rules
+
+[Install]
+WantedBy=multi-user.target
+