Messages in this thread | | | Date | Wed, 26 Apr 2023 20:37:30 -0700 | From | Nicolin Chen <> | Subject | Re: [PATCH] iommu/vt-d: Remove unnecessary locking in intel_irq_remapping_alloc() |
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On Thu, Apr 27, 2023 at 11:20:40AM +0800, Baolu Lu wrote:
> > Attaching WARNINGs: > > [ 19.680725] ------------[ cut here ]------------ > > [ 19.681083] WARNING: CPU: 0 PID: 561 at include/linux/mmap_lock.h:161 track_pfn_remap+0xf5/0x100
> > [ 19.684817] Call Trace: > > [ 19.684893] <TASK> > > [ 19.684967] remap_pfn_range+0x3e/0xa0 > > [ 19.685084] vfio_pci_mmap_fault+0x8a/0x160 [vfio_pci_core]
> I took a quick look. It seems that above warnings are irrelevant to this > commit. Can you please simply revert this commit and check whether there > are any changes?
I tried on top of the v6.3-rc5 tag. The warnings were triggered constantly. And reverting the commit fixes it: nicolinc@Asurada-Nvidia:~/work/mkt/images/nicolinc/src/kernel$ git log --oneline -2 cb3dc9b2417e (HEAD -> v6.3-rc5) Revert "iommu/vt-d: Remove unnecessary locking in intel_irq_remapping_alloc()" 7e364e56293b (tag: v6.3-rc5, jgg/linus) Linux 6.3-rc5
I don't think the commit is the causation yet there seems to be a strong correlation here...
Thanks Nic
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