From: Keir Fraser <keir@xensource.com>
To: "Xu, Anthony" <anthony.xu@intel.com>, Keir Fraser <keir@xensource.com>
Cc: xen-devel@lists.xensource.com,
xen-ia64-devel <xen-ia64-devel@lists.xensource.com>
Subject: Re: Question about evtchn_callback reentry
Date: Wed, 20 Dec 2006 08:31:10 +0000 [thread overview]
Message-ID: <C1AEA54E.60BC%keir@xensource.com> (raw)
In-Reply-To: <51CFAB8CB6883745AE7B93B3E084EBE207DDAE@pdsmsx412.ccr.corp.intel.com>
On 20/12/06 3:03 am, "Xu, Anthony" <anthony.xu@intel.com> wrote:
>> Okay, so I remember now that of course the APIC divides these into 16
>> priority levels so that does rather restrict the maximum nesting.
>> I'll be happy to consider adding prioritisation (or just complete
>> disallow of nesting) for 3.0.5.
>
> Hi Keir,
>
> I did a experiment,
> If we completely disallow of nesting.
> Even dom0 can't boot.
>
> I suspected timer interrupt is blocked by other events.
How did you implement nesting avoidance? It'll be a bit subtle to get right.
-- Keir
next prev parent reply other threads:[~2006-12-20 8:31 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-20 3:03 [Xen-devel] Question about evtchn_callback reentry Xu, Anthony
2006-12-20 8:31 ` Keir Fraser [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-12-20 10:08 Xu, Anthony
2006-12-20 10:31 ` Keir Fraser
2006-12-18 9:53 Xu, Anthony
2006-12-18 11:24 ` Keir Fraser
2006-12-18 13:42 ` Keir Fraser
2006-12-18 5:28 [Xen-devel] " Xu, Anthony
2006-12-18 9:31 ` Keir Fraser
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