Messages in this thread | | | Subject | Re: [lkp] [iommu/vt] 571dbbd4d04: DMAR-IR: Failed to copy IR table for dmar1 from previous kernel | From | Huang Ying <> | Date | Thu, 02 Jul 2015 15:56:23 +0800 |
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On Thu, 2015-07-02 at 08:39 +0200, Joerg Roedel wrote: > On Thu, Jul 02, 2015 at 01:14:18PM +0800, Huang Ying wrote: > > FYI, we noticed the below changes on > > > > git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > > master > > commit 571dbbd4d044e11c78bc077acb3ccef4c77b096e ("iommu/vt-d: Don't > > disable IR when it was previously enabled") > > > > The following new message in kernel log may make end user > > confusing. > > > > [ 0.503764] DMAR-IR: IRQ remapping was enabled on dmar0 but we > > are not in kdump mode > > [ 0.512418] DMAR-IR: Failed to copy IR table for dmar0 from > > previous kernel > > [ 0.520501] DMAR-IR: IRQ remapping was enabled on dmar1 but we > > are not in kdump mode > > [ 0.529154] DMAR-IR: Failed to copy IR table for dmar1 from > > previous kernel > > [ 0.537077] DMAR-IR: Enabled IRQ remapping in x2apic mode > > This is not a problem, the kernel detected that the IOMMU was already > enabled, but it is not booting into a kdump kernel so it is not > trying > to copy over translation tables. The messages for this case are > indeed a > bit misleading, it looks like the kernel tried to copy the > translation > tables, but it didn't. I'll fix this. > > What were you doing to trigger this, it is quite uncommon to find the > IOMMU enabled on a normal kernel boot. Did you boot with kexec into a > new kernel?
Yes. We use kexec to boot the new kernel.
Best Regards, Huang, Ying
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