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SubjectRe: [Intel IOMMU 06/10] Avoid memory allocation failures in dma map api calls
Peter Zijlstra wrote:
>
>
> PF_MEMALLOC as is, is meant to salvage the VM from the typical VM
> deadlock.

.. and this IS the typical VM deadlock.. it is your storage driver
trying to write out a piece of memory on behalf of the VM, and calls
the iommu to map it, which then needs a bit of memory....
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