Re: [Qemu-devel] [PATCH] Don't enable a HPET timer if HPET is disabled

2014-03-26 Thread Matt Lupfer
On 02/22/2014 02:01 AM, Paolo Bonzini wrote: > Il 22/02/2014 05:37, Matt Lupfer ha scritto: >> A HPET timer can be started when HPET is not yet >> enabled. This will not generate an interrupt >> to the guest, but causes problems when HPET is later >> enabled. >&g

[Qemu-devel] [PATCH] Don't enable a HPET timer if HPET is disabled

2014-02-21 Thread Matt Lupfer
lized). This results in a long period of no HPET timer ticks. When this occurs with a CentOS 5.x guest, the guest may not receive timer interrupts during its narrow timer check window and panic on boot. Signed-off-by: Matt Lupfer --- hw/timer/hpet.c | 3 ++- 1 file changed, 2 insertions(+), 1 del

Re: [Qemu-devel] CentOS 5.x intermittently fails to boot on QEMU 1.7.0

2014-02-21 Thread Matt Lupfer
On 02/21/2014 06:27 AM, Alex Bligh wrote: > > On 21 Feb 2014, at 04:34, Matt Lupfer wrote: > >> >> This doesn't appear to be a solution, because with the timer rewrite, QEMU >> moves its periodic (1 ms) qemu_notify_event() call to break out of >> the main ev

[Qemu-devel] CentOS 5.x intermittently fails to boot on QEMU 1.7.0

2014-02-20 Thread Matt Lupfer
Hello, After upgrading to QEMU 1.7.0, CentOS 5.x guests often fail to boot with the following kernel apic=debug output: > ACPI: Core revision 20060707 > enabled ExtINT on CPU#0 > ENABLING IO-APIC IRQs > ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1 > ..MP-BIOS bug: 8254 timer not connecte