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Daniel Kiper 080e2be788 xen/balloon: memory hotplug support for Xen balloon driver 
Memory hotplug support for Xen balloon driver.  It should be mentioned
that hotplugged memory is not onlined automatically.  It should be onlined
by user through standard sysfs interface.

Memory could be hotplugged in following steps:

  1) dom0: xl mem-max <domU> <maxmem>
     where <maxmem> is >= requested memory size,

  2) dom0: xl mem-set <domU> <memory>
     where <memory> is requested memory size; alternatively memory
     could be added by writing proper value to
     /sys/devices/system/xen_memory/xen_memory0/target or
     /sys/devices/system/xen_memory/xen_memory0/target_kb on dumU,

  3) domU: for i in /sys/devices/system/memory/memory*/state; do \
             [ "`cat "$i"`" = offline ] && echo online > "$i"; done

Memory could be onlined automatically on domU by adding following line to
udev rules:

  SUBSYSTEM=="memory", ACTION=="add", RUN+="/bin/sh -c '[ -f /sys$devpath/state ] && echo online > /sys$devpath/state'"

In that case step 3 should be omitted.

Signed-off-by: Daniel Kiper <dkiper@net-space.pl>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-25 20:57:08 -07:00
..
accessibility
acpi Merge branches 'd3cold', 'bugzilla-37412' and 'bugzilla-38152' into release 2011-07-14 00:16:38 -04:00
amba
ata ata: PATA_ARASAN_CF depends on DMADEVICES 2011-07-23 18:07:47 -04:00
atm lanai: use pci_dev->subsystem_device 2011-07-12 07:59:38 -07:00
auxdisplay
base Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap 2011-07-23 11:14:47 -07:00
bcma Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2011-07-22 17:51:16 -04:00
block Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
bluetooth Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2011-07-15 10:05:24 -04:00
cdrom
char Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2011-07-24 09:05:32 -07:00
clk
clocksource Merge branch 'timers-clocksource-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-23 10:34:47 -07:00
connector Merge branch 'ptrace' of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc 2011-07-22 15:06:50 -07:00
cpufreq [CPUFREQ] s5pv210: make needlessly global symbols static 2011-07-13 18:30:00 -04:00
cpuidle
crypto crypto: caam - ablkcipher support 2011-07-15 11:21:42 +08:00
dca
dio
dma Merge branch 'spi/next' of git://git.secretlab.ca/git/linux-2.6 2011-07-22 14:52:44 -07:00
edac
eisa
firewire Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2011-07-22 14:49:48 -07:00
firmware [SCSI] iscsi_ibft, be2iscsi, iscsi_boot: fix boot kobj data lifetime management 2011-06-29 16:43:06 -05:00
gpio Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6 2011-07-22 14:50:57 -07:00
gpu Merge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6 2011-07-21 11:07:18 -07:00
hid Merge branches 'roccat', 'upstream' and 'wiimote' into for-linus 2011-07-22 22:47:08 +02:00
hwmon hwmon: (max1111) Fix race condition causing NULL pointer exception 2011-07-17 18:39:19 +02:00
hwspinlock
i2c Merge branch 'for-30-rc5/all-i2c' of git://git.fluff.org/bjdooks/linux 2011-07-07 16:29:29 -07:00
ide
idle
ieee802154 IEEE 802.15.4: do not enable driver debugging by default 2011-06-30 16:18:09 +04:00
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2011-07-22 14:50:12 -07:00
input Merge branch 'timers-cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 16:51:56 -07:00
iommu iommu/amd: Don't use MSI address range for DMA addresses 2011-07-06 17:14:44 +02:00
isdn net: Push protocol type directly down to header_ops->cache() 2011-07-13 02:29:59 -07:00
leds Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6 2011-07-22 14:50:57 -07:00
lguest lguest: Fix in/out emulation 2011-07-22 14:39:51 +09:30
macintosh drivers: fix up various ->llseek() implementations 2011-07-20 20:47:58 -04:00
mca
md Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
media Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2011-07-21 13:38:42 -07:00
memstick
message
mfd w1: ds1wm: add a reset recovery parameter 2011-07-08 21:14:44 -07:00
misc drivers/misc/pch_phub.c: don't oops if dmi_get_system_info returns NULL 2011-07-25 20:57:07 -07:00
mmc Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2011-07-24 10:20:54 -07:00
mtd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
net bnx2x: use pci_pcie_cap() 2011-07-24 13:11:40 -07:00
nfc NFC: pn533: add NXP pn533 nfc device driver 2011-07-05 15:26:58 -04:00
nubus
of of: fix missing include from of_pci.c 2011-07-23 23:53:55 -06:00
oprofile perf: Remove the nmi parameter from the oprofile_perf backend 2011-07-21 20:41:58 +02:00
parisc
parport
pci Merge branch 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 16:39:42 -07:00
pcmcia pcmcia: pxa2xx/vpac270: free gpios on exist rather than requesting 2011-07-11 14:26:34 +08:00
platform hp-wmi: fix use after free 2011-07-11 09:52:35 -04:00
pnp
power
pps
ps3
ptp
rapidio
regulator regulator: Convert tps65023 to use regmap API 2011-07-23 07:57:02 +01:00
rtc Merge branch 'timers-rtc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 16:52:39 -07:00
s390 [S390] dasd: add enhanced DASD statistics interface 2011-07-24 10:48:23 +02:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2011-07-23 11:13:11 -07:00
sfi
sh switch assorted clock drivers to debugfs_remove_recursive() 2011-07-20 20:47:51 -04:00
sn
spi Merge branch 'spi/next' of git://git.secretlab.ca/git/linux-2.6 2011-07-22 14:52:44 -07:00
ssb ssb: return correct translation bit for 64-bit DMA 2011-07-22 09:51:12 -04:00
staging gma500: udlay(20000) is too large 2011-07-24 20:42:47 -07:00
target Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2011-07-23 11:13:11 -07:00
tc
telephony
thermal
tty Merge branch 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6 2011-07-22 14:53:38 -07:00
uio
usb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
uwb
vhost vhost: handle wrap around in # of bufs math 2011-07-21 10:48:27 +03:00
video backlight: set backlight type and max_brightness before backlights are registered 2011-07-25 20:57:08 -07:00
virtio virtio: expose for non-virtualization users too 2011-07-23 16:20:30 +09:30
vlynq
w1 w1: ds1wm: add a reset recovery parameter 2011-07-08 21:14:44 -07:00
watchdog watchdog: hpwdt depends on PCI 2011-07-17 12:40:08 +00:00
xen xen/balloon: memory hotplug support for Xen balloon driver 2011-07-25 20:57:08 -07:00
zorro
Kconfig virtio: expose for non-virtualization users too 2011-07-23 16:20:30 +09:30
Makefile Merge branch 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 16:39:42 -07:00