From: Keir Fraser <keir.fraser@eu.citrix.com>
To: Qing He <qing.he@intel.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
Shohei Fujiwara <fujiwara-sxa@necst.nec.co.jp>
Subject: Re: [PATCH 0/6] MSI-INTx interrupt translation for HVM
Date: Mon, 02 Mar 2009 09:40:40 +0000 [thread overview]
Message-ID: <C5D15A18.3DCC%keir.fraser@eu.citrix.com> (raw)
In-Reply-To: <20090302092440.GA22064@ub-qhe2>
On 02/03/2009 09:24, "Qing He" <qing.he@intel.com> wrote:
>> Ah, well the passthrough-specific logic is not something I'm so familiar
>> with! That above code indeed doesn't look correct. :-)
>
> I recently learned that some device may keep issuing MSI until it is
> explicitly
> cleared by software. In that case it just behaves like level-triggered
> interrupt, and doing something like the code above will cause interrupt storm.
> This is reflected in cs. 19065.
>
> Do you mean this issue?
That would be the expected result of early EOI, yes. But Shohei was walking
about losing interrupts. I don't know how we would do that.
-- Keir
next prev parent reply other threads:[~2009-03-02 9:40 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-08 9:06 [PATCH 0/6] MSI-INTx interrupt translation for HVM Qing He
2009-01-08 9:06 ` [PATCH 1/6] passthrough: MSI-INTx " Qing He
2009-01-08 9:06 ` [PATCH 2/6] ioemu:passthrough: MSI-INTx interrupt translation support Qing He
2009-01-08 9:06 ` [PATCH 3/6] pci: add pci option support for XML-RPC server Qing He
2009-01-08 9:06 ` [PATCH 4/6] pci: add pci option support for XenAPI server Qing He
2009-01-08 9:06 ` [PATCH 5/6] pci: add config options for MSI-INTx translation in HVM Qing He
2009-01-08 9:06 ` [PATCH 6/6] passthough: MSI-INTx translation documentation Qing He
2009-01-08 10:44 ` [PATCH 0/6] MSI-INTx interrupt translation for HVM Shohei Fujiwara
2009-01-08 14:52 ` Qing He
2009-01-09 4:26 ` Shohei Fujiwara
2009-01-09 6:57 ` Qing He
2009-01-13 9:05 ` Shohei Fujiwara
2009-01-13 9:28 ` Qing He
2009-01-14 6:39 ` Shohei Fujiwara
2009-01-14 7:38 ` Qing He
2009-01-14 8:26 ` Shohei Fujiwara
2009-01-14 9:17 ` Qing He
2009-01-15 2:35 ` Shohei Fujiwara
2009-01-15 6:25 ` Qing He
2009-01-16 4:34 ` Shohei Fujiwara
2009-02-27 2:41 ` Shohei Fujiwara
2009-03-01 14:55 ` Keir Fraser
2009-03-02 7:19 ` Shohei Fujiwara
2009-03-02 8:47 ` Keir Fraser
2009-03-02 9:24 ` Qing He
2009-03-02 9:40 ` Keir Fraser [this message]
2009-03-02 10:27 ` Shohei Fujiwara
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