diff options
| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2016-03-16 00:56:52 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-16 02:55:16 +0300 |
| commit | 703fc13a3f6615e29ce3eb862275d7b58a5d03ba (patch) | |
| tree | 6bda3ae632b9add282e148865df976dadf107e97 /drivers/xen/Kconfig | |
| parent | 31bc3858ea3ebcc3157b3f5f0e624c5962f5a7a6 (diff) | |
| download | linux-703fc13a3f6615e29ce3eb862275d7b58a5d03ba.tar.xz | |
xen_balloon: support memory auto onlining policy
Add support for the newly added kernel memory auto onlining policy to
Xen ballon driver.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Suggested-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Acked-by: David Vrabel <david.vrabel@citrix.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Daniel Kiper <daniel.kiper@oracle.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Tang Chen <tangchen@cn.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Kay Sievers <kay@vrfy.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/xen/Kconfig')
| -rw-r--r-- | drivers/xen/Kconfig | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig index 73708acce3ca..979a8317204f 100644 --- a/drivers/xen/Kconfig +++ b/drivers/xen/Kconfig @@ -37,23 +37,30 @@ config XEN_BALLOON_MEMORY_HOTPLUG Memory could be hotplugged in following steps: - 1) dom0: xl mem-max <domU> <maxmem> + 1) target domain: ensure that memory auto online policy is in + effect by checking /sys/devices/system/memory/auto_online_blocks + file (should be 'online'). + + 2) control domain: xl mem-max <target-domain> <maxmem> where <maxmem> is >= requested memory size, - 2) dom0: xl mem-set <domU> <memory> + 3) control domain: xl mem-set <target-domain> <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, + /sys/devices/system/xen_memory/xen_memory0/target_kb on the + target domain. - 3) domU: for i in /sys/devices/system/memory/memory*/state; do \ - [ "`cat "$i"`" = offline ] && echo online > "$i"; done + Alternatively, if memory auto onlining was not requested at step 1 + the newly added memory can be manually onlined in the target domain + by doing the following: - Memory could be onlined automatically on domU by adding following line to udev rules: + for i in /sys/devices/system/memory/memory*/state; do \ + [ "`cat "$i"`" = offline ] && echo online > "$i"; done - SUBSYSTEM=="memory", ACTION=="add", RUN+="/bin/sh -c '[ -f /sys$devpath/state ] && echo online > /sys$devpath/state'" + or by adding the following line to udev rules: - In that case step 3 should be omitted. + SUBSYSTEM=="memory", ACTION=="add", RUN+="/bin/sh -c '[ -f /sys$devpath/state ] && echo online > /sys$devpath/state'" config XEN_BALLOON_MEMORY_HOTPLUG_LIMIT int "Hotplugged memory limit (in GiB) for a PV guest" |