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linux-yocto/Documentation/ABI/stable/sysfs-devices-system-xen_memory
David Vrabel e0438b91ba xen: document balloon driver sysfs files 
Add ABI documentation for the balloon driver's sysfs files.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Daniel Kiper <dkiper@net-space.pl>
[v2: Added comments from Daniel]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-11-09 16:00:46 -05:00

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What: /sys/devices/system/xen_memory/xen_memory0/max_retry_count Date: May 2011 KernelVersion: 2.6.39 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: The maximum number of times the balloon driver will attempt to increase the balloon before giving up. See also 'retry_count' below. A value of zero means retry forever and is the default one.

What: /sys/devices/system/xen_memory/xen_memory0/max_schedule_delay Date: May 2011 KernelVersion: 2.6.39 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: The limit that 'schedule_delay' (see below) will be increased to. The default value is 32 seconds.

What: /sys/devices/system/xen_memory/xen_memory0/retry_count Date: May 2011 KernelVersion: 2.6.39 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: The current number of times that the balloon driver has attempted to increase the size of the balloon. The default value is one. With max_retry_count being zero (unlimited), this means that the driver will attempt to retry with a 'schedule_delay' delay.

What: /sys/devices/system/xen_memory/xen_memory0/schedule_delay Date: May 2011 KernelVersion: 2.6.39 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: The time (in seconds) to wait between attempts to increase the balloon. Each time the balloon cannot be increased, 'schedule_delay' is increased (until 'max_schedule_delay' is reached at which point it will use the max value).

What: /sys/devices/system/xen_memory/xen_memory0/target Date: April 2008 KernelVersion: 2.6.26 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: The target number of pages to adjust this domain's memory reservation to.

What: /sys/devices/system/xen_memory/xen_memory0/target_kb Date: April 2008 KernelVersion: 2.6.26 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: As target above, except the value is in KiB.

What: /sys/devices/system/xen_memory/xen_memory0/info/current_kb Date: April 2008 KernelVersion: 2.6.26 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: Current size (in KiB) of this domain's memory reservation.

What: /sys/devices/system/xen_memory/xen_memory0/info/high_kb Date: April 2008 KernelVersion: 2.6.26 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: Amount (in KiB) of high memory in the balloon.

What: /sys/devices/system/xen_memory/xen_memory0/info/low_kb Date: April 2008 KernelVersion: 2.6.26 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: Amount (in KiB) of low (or normal) memory in the balloon.