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Re: [Xen-devel] [PATCH] IRQ: Group IRQ_MOVE_CLEANUP_VECTOR with other h

from [Jan Beulich]

[Permanent Link][Original]

To:	"Andrew Cooper" <andrew.cooper3@xxxxxxxxxx>
Subject:	Re: [Xen-devel] [PATCH] IRQ: Group IRQ_MOVE_CLEANUP_VECTOR with other hypervisor IPIs
From:	"Jan Beulich" <JBeulich@xxxxxxxx>
Date:	Thu, 08 Sep 2011 10:48:04 +0100
Cc:	"xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir@xxxxxxx>, "xiantao.zhang@xxxxxxxxx" <xiantao.zhang@xxxxxxxxx>
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>>> On 08.09.11 at 11:33, Andrew Cooper <andrew.cooper3@xxxxxxxxxx> wrote:
> Having said that, 0x80 and 0x82 are right in the middle of the dynamic
> vector region, and moving them out is not really something which should
> be done.
> 
> (It also occurs to me that now we assign randomly in the dynamic vector
> region, it is pot luck as to whether you MSI is going to pre-empt a
> hypercall or not.  I don't know if this matters particularly, however)

No - these don't go through the LAPIC, and hence aren't subject to
prioritization there.

Jan


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[Xen-devel] [PATCH] IRQ: Group IRQ_MOVE_CLEANUP_VECTOR with other hypervisor IPIs, Andrew Cooper Re: [Xen-devel] [PATCH] IRQ: Group IRQ_MOVE_CLEANUP_VECTOR with other hypervisor IPIs, Jan Beulich Re: [Xen-devel] [PATCH] IRQ: Group IRQ_MOVE_CLEANUP_VECTOR with other hypervisor IPIs, Keir Fraser Re: [Xen-devel] [PATCH] IRQ: Group IRQ_MOVE_CLEANUP_VECTOR with other hypervisor IPIs, Andrew Cooper Re: [Xen-devel] [PATCH] IRQ: Group IRQ_MOVE_CLEANUP_VECTOR with other hypervisor IPIs, Jan Beulich Re: [Xen-devel] [PATCH] IRQ: Group IRQ_MOVE_CLEANUP_VECTOR with other hypervisor IPIs, Keir Fraser Re: [Xen-devel] [PATCH] IRQ: Group IRQ_MOVE_CLEANUP_VECTOR with other hypervisor IPIs, Andrew Cooper Re: [Xen-devel] [PATCH] IRQ: Group IRQ_MOVE_CLEANUP_VECTOR with other hypervisor IPIs, Keir Fraser Re: [Xen-devel] [PATCH] IRQ: Group IRQ_MOVE_CLEANUP_VECTOR with other hypervisor IPIs, Jan Beulich Re: [Xen-devel] [PATCH] IRQ: Group IRQ_MOVE_CLEANUP_VECTOR with other hypervisor IPIs, Andrew Cooper Re: [Xen-devel] [PATCH] IRQ: Group IRQ_MOVE_CLEANUP_VECTOR with other hypervisor IPIs, Jan Beulich <=

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