Re: [Xen-ia64-devel] please test machvec+sn2 tree

2006-12-17 Thread Akio Takebe
Hi, Alex, Jes, and all

I tested the machvec+sn2 tree on Tiger4(which is montecito machine)
and PRIMEQUEST480(which is madison machine).

I can boot dom0, up,smp-domU, up,smp-domVTI on Tiger4.
And I can boot dom0, up,smp-domU on PRIMEQUEST480.
I can run unixbench up-domU, up-domVTI on Tiger4 completely.

The test changeset is #13075 of 
http://free.linux.hp.com/~awilliam/xen-ia64-machvec/.

Best Regards,

Akio Takebe


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Re: [Xen-ia64-devel] please test machvec+sn2 tree

2006-12-17 Thread Alex Williamson
On Mon, 2006-12-18 at 00:39 +0900, Akio Takebe wrote:
 Hi, Alex, Jes, and all
 
 I tested the machvec+sn2 tree on Tiger4(which is montecito machine)
 and PRIMEQUEST480(which is madison machine).
 
 I can boot dom0, up,smp-domU, up,smp-domVTI on Tiger4.
 And I can boot dom0, up,smp-domU on PRIMEQUEST480.
 I can run unixbench up-domU, up-domVTI on Tiger4 completely.

   Great!  Thanks for your testing help Akio,

Alex


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Re: [xen-ia64-devel] dom0 memory not responding to changing dom0_mem

2006-12-17 Thread Akio Takebe
Hi, David

My elilo.conf entry looks like this

image=vmlinuz-2.6.16.33-xen0
label=2.6.16.33-xen0
vmm=xen-3.0-unstable.gz
initrd=initrd-2.6.16.33-xen0.img
read-only
append=sync_console dom0_mem=262144 root=/dev/sda2 3

I've tried changing dom0_mem to 256M, 128M and the dom0 system keeps
coming up with 453M of memory.
We need to split options of xen and dom0 with --.
So you should use like the following option.

append=sync_console dom0_mem=262144 -- root=/dev/sda2 3

Best Regards,

Akio Takebe


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[Xen-ia64-devel] [Xen-devel] Question about evtchn_callback reentry

2006-12-17 Thread Xu, Anthony
Hi Keir,

I have some questions about evtchn_callback,

As we know all external interrupts and events are deliver to dom0 by
evtchn_callback,

Are evtchn_callback reentered?

I mean when evtchn_callbacak is executing on dom0,

Another external interrupt or event may happen, can this event be
deliverred immediately?

I found __sti will set vcpu_info- evtchn_upcall_mask=0, which permits
event deliverring.

and __sti may be called at any device driver. 

If evtchn_callback can be reentered, how does it hanlde external
interrupt privilege?

If there is no special handling, low privileged interrupt may
interrupt high privileged interrupt.


BTW,
I do see evtchn_callback reentry happen on IPF dom0, and that incur
about 5% performance degradation
with KB on VTI-domain compared to non_reentry.



Thanks,
Anthony

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