[Xen-devel] [PATCH 0/3] prevent qemu-xen-traditional from waking up needlessly

[Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>]

Hi all,
this small patch series prevents qemu-xen-traditional from waking up
needlessly several times a second in order to check some timers.

The first patch makes use of a new mechanism to receive buffered io
event notifications from Xen, so that qemu doesn't need to check the
buffered io page for data 10 times a sec for the entire life of the VM.

The second patch stops qemu-xen-traditional from starting some timers
for RTC emulation; they are not needed because the RTC is already
emulated in the hypervisor.

Finally the last patch increases the default select timeout to 1h:
nothing should rely on the select timeout to be 1sec, so we might as
well increase it to 1h.


Stefano Stabellini (3):
      xen: introduce an event channel for buffered io event notifications
      xen: don't initialize the RTC timers if xen is available
      increase minimum timeout to 1h

 hw/mc146818rtc.c  |    2 ++
 i386-dm/helper2.c |   45 +++++++++++++++++++++++++++++++++++++--------
 2 files changed, 39 insertions(+), 8 deletions(-)


Cheers,

Stefano

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