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Re: [Xen-devel] RE: [Xen-changelog] [xen-unstable]vt-d: Fixpanic in msi_
| To: | Miroslav Rezanina <mrezanin@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] RE: [Xen-changelog] [xen-unstable]vt-d: Fixpanic in msi_msg_read_remap_rte with acpi=off |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Mon, 19 Oct 2009 12:43:49 +0100 |
| Cc: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Dexuan Cui <dexuan.cui@xxxxxxxxx> |
| Delivery-date: | Mon, 19 Oct 2009 04:44:20 -0700 |
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| Thread-topic: | [Xen-devel] RE: [Xen-changelog] [xen-unstable]vt-d: Fixpanic in msi_msg_read_remap_rte with acpi=off |
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On 19/10/2009 12:18, "Miroslav Rezanina" <mrezanin@xxxxxxxxxx> wrote: >> I'll be applying Dexuan's original replacement patch. >> >> -- Keir >> > > I retest version with removed NULL checks and in this case, my system crashes. > So there has to be checks for NULL or something else is wrong. Got a backtrace and Xen boot params? If you pass acpi=off, then disable_acpi() is invoked, and this sets acpi_disabled. If acpi_disabled=1, then iommu_setup() sets iommu_enabled=0. If iommu_enabled=0 then I think all the update_ire_from_* and similar hooks get disabled in the callers. So something unexpected must be happening. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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