[Qemu-devel] [RFC][PATCH 0/2] Allow cache settings for block devices to be changed at runtime.

[Prerna Saxena]

The following patchset introduces monitor commands:

1. set_cache DEVICE CACHE-SETTING
Change cache settings for block device, DEVICE, through the monitor.
(Available options : 'none', 'writeback', 'writethrough')
Eg,
(qemu)set_cache ide0-hd0 none 
-> Changes cache setting for ide0-hd0 to 'none'

2. info block
Now extended to display cache settings for available block devices.

TODOS :
-------
1. Support 'unsafe' cache mode.
2. Display current cache setting for device, if the CACHE-SETTING option
is not supplied by the user. Eg, 
(qemu)set_cache ide0-hd0
presently errors out. Ideally, it should display current cache setting 
for the given device ide0-hd0

-- 
Prerna Saxena

Linux Technology Centre,
IBM Systems and Technology Lab,
Bangalore, India