Re: [RFC][PATCH 0/3]: Fixes to IRQ routing

[Avi Kivity <avi@redhat.com>]

On 06/08/2010 08:55 PM, Chris Lalancette wrote:
> As we've discussed previously, here is a series of patches to
> fix some of the IRQ routing issues we have in KVM.  With this series
> in place I was able to successfully kdump a RHEL-5 64-bit, and RHEL-6
> 32- and 64-bit guest on CPU's other than the BSP.  RHEL-5 32-bit kdump still
> does not work; it gets stuck on "Checking 'hlt' instruction".  However,
> it does that both before and after this series, so there is something
> else going on there that I still have to debug.
>
> I also need to change the "kvm_migrate_pit_timer" function to migrate the
> timer over to the last CPU that handled the timer interrupt, on the
> theory that that particlar CPU is likely to handle the timer interrupt again
> in the near future.
>
> The other outstanding question about these patches is how to setup the
> workqueue.  As it stands I have a single workqueue for all guests.  However,
> for efficiency reasons we may want to have one workqueue per guest.  Opinions?
>    

Perhaps a singlethreaded workqueue per guest?  Or perhaps just 
schedule_work(), and let the kernel worry about the details?


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