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Re: [Xen-devel] [PATCH 2/2] passthrough: deliver IRQs even if bsp is hal
| To: | "Han, Weidong" <weidong.han@xxxxxxxxx>, 'Kouya Shimura' <kouya@xxxxxxxxxxxxxx>, "'xen-devel@xxxxxxxxxxxxxxxxxxx'" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH 2/2] passthrough: deliver IRQs even if bsp is halted (support kexec/kdump on hvm) |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Tue, 30 Jun 2009 10:04:19 +0100 |
| Cc: | |
| Delivery-date: | Tue, 30 Jun 2009 02:04:56 -0700 |
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| Thread-topic: | [Xen-devel] [PATCH 2/2] passthrough: deliver IRQs even if bsp is halted (support kexec/kdump on hvm) |
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On 30/06/2009 09:53, "Han, Weidong" <weidong.han@xxxxxxxxx> wrote: > Kouya Shimura wrote: >> This patch is needed for kexec/kdump on hvm since kdump halts bsp. >> >> Signed-off-by: Kouya Shimura <kouya@xxxxxxxxxxxxxx> > > It kicks every online vcpu. The result will be more unnecessary IPIs, > especially the vcpu# is big. Therefore increase cost of interrupt handling of > assigned devices. Actually it breaks out of the loop as soon as it kicks one. But still all vcpus will pile into hvm_dirq_assist() on every vmexit, which is quite undesirable too. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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