From: Sheng Yang <sheng@linux.intel.com>
To: Keir Fraser <keir.fraser@eu.citrix.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
Eddie Dong <eddie.dong@intel.com>,
Jun Nakajima <jun.nakajima@intel.com>
Subject: Re: [PATCH][v2] Hybrid extension support in Xen
Date: Tue, 2 Feb 2010 22:39:10 +0800 [thread overview]
Message-ID: <201002022239.10384.sheng@linux.intel.com> (raw)
In-Reply-To: <C78DE7E9.8C2F%keir.fraser@eu.citrix.com>
On Tuesday 02 February 2010 22:32:09 Keir Fraser wrote:
> On 02/02/2010 14:08, "Sheng Yang" <sheng@linux.intel.com> wrote:
> >> Okay, so that leads to the obvious next question: why do you want to
> >> avoid using INIT-SIPI-SIPI?
> >
> > Because we don't have IOAPIC/LAPIC...
>
> Is it necessary to remove the LAPICs completely? If you go very far down
> the route of ripping emulated stuff out of HVM, it starts to feel like
> starting with a pure PV guest and HVMing it up is closer in spirit to what
> you might be aiming for.
The performance of interrupt delivery is what we care about. The IOAPIC/LAPIC
don't work well now, so we want event channel to eliminate their overhead,
notably EOI in LAPIC.
And you know, start from a PV guest is another story...
--
regards
Yang, Sheng
next prev parent reply other threads:[~2010-02-02 14:39 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-02 8:16 [PATCH][v2] Hybrid extension support in Xen Sheng Yang
2010-02-02 11:22 ` Ian Campbell
2010-02-02 12:54 ` Sheng Yang
2010-02-02 13:19 ` Ian Campbell
2010-02-02 13:28 ` Sheng Yang
2010-02-02 13:50 ` Ian Campbell
2010-02-02 14:00 ` Tim Deegan
2010-02-02 14:22 ` Sheng Yang
2010-02-02 14:28 ` Sheng Yang
2010-02-02 13:35 ` Keir Fraser
2010-02-02 13:52 ` Sheng Yang
2010-02-02 14:01 ` Keir Fraser
2010-02-02 14:13 ` Sheng Yang
2010-02-02 11:26 ` Ian Campbell
2010-02-02 13:06 ` Sheng Yang
2010-02-02 13:52 ` Ian Campbell
2010-02-02 14:04 ` Stefano Stabellini
2010-02-02 14:07 ` Sheng Yang
2010-02-02 16:15 ` Ian Campbell
2010-02-02 16:31 ` Sheng Yang
2010-02-02 18:03 ` Ian Campbell
2010-02-02 18:27 ` Stefano Stabellini
2010-02-03 5:15 ` Sheng Yang
2010-02-03 10:39 ` Tim Deegan
2010-02-02 11:32 ` Paul Durrant
2010-02-02 13:23 ` Keir Fraser
2010-02-02 13:37 ` Sheng Yang
2010-02-02 14:03 ` Keir Fraser
2010-02-02 14:08 ` Sheng Yang
2010-02-02 14:32 ` Keir Fraser
2010-02-02 14:37 ` Keir Fraser
2010-02-02 15:51 ` Sheng Yang
2010-02-02 14:39 ` Sheng Yang [this message]
2010-02-02 13:52 ` Ian Campbell
2010-02-02 13:53 ` Sheng Yang
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