linux/drivers/xen
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
..
xen-pciback xen/pciback: Have 'passthrough' option instead of XEN_PCIDEV_BACKEND_PASS and XEN_PCIDEV_BACKEND_VPCI 2011-07-19 21:04:20 -04:00
xenbus xen: Add module alias to autoload backend drivers 2011-06-30 12:15:33 -04:00
xenfs
Kconfig xen/balloon: memory hotplug support for Xen balloon driver 2011-07-25 20:57:08 -07:00
Makefile Merge branch 'stable/xen-pciback-0.6.3' into stable/drivers 2011-07-20 15:33:51 -04:00
balloon.c xen/balloon: memory hotplug support for Xen balloon driver 2011-07-25 20:57:08 -07:00
biomerge.c
cpu_hotplug.c
events.c xen/pci: Remove 'xen_allocate_pirq_gsi'. 2011-07-11 13:19:33 -04:00
evtchn.c treewide: remove extra semicolons 2011-04-10 17:01:05 +02:00
features.c
gntalloc.c
gntdev.c Merge branches 'stable/backend.base.v3' and 'stable/gntalloc.v7' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2011-05-19 16:14:25 -07:00
grant-table.c xen/p2m/m2p/gnttab: Support GNTMAP_host_map in the M2P override. 2011-04-18 11:10:27 -04:00
manage.c PM: Remove sysdev suspend, resume and shutdown operations 2011-05-11 21:37:15 +02:00
pci.c
platform-pci.c
swiotlb-xen.c Merge branch 'stable/xen-swiotlb.bugfix' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb-2.6 2011-06-09 12:52:44 -07:00
sys-hypervisor.c drivers/xen/sys-hypervisor: Cleanup code/data sections definitions 2011-05-19 11:30:41 -04:00
tmem.c xen: prepare tmem shim to handle frontswap 2011-06-17 15:06:20 -06:00
xen-balloon.c xen: tmem: self-ballooning and frontswap-selfshrinking 2011-07-08 12:26:21 -06:00
xen-selfballoon.c xen: tmem: self-ballooning and frontswap-selfshrinking 2011-07-08 12:26:21 -06:00
xencomm.c