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SubjectRe: [PATCH kernel v12 09/34] vfio: powerpc/spapr: Move locked_vm accounting to helpers
On Fri, Jun 05, 2015 at 04:35:01PM +1000, Alexey Kardashevskiy wrote:
> There moves locked pages accounting to helpers.
> Later they will be reused for Dynamic DMA windows (DDW).
> This reworks debug messages to show the current value and the limit.
> This stores the locked pages number in the container so when unlocking
> the iommu table pointer won't be needed. This does not have an effect
> now but it will with the multiple tables per container as then we will
> allow attaching/detaching groups on fly and we may end up having
> a container with no group attached but with the counter incremented.
> While we are here, update the comment explaining why RLIMIT_MEMLOCK
> might be required to be bigger than the guest RAM. This also prints
> pid of the current process in pr_warn/pr_debug.
> Signed-off-by: Alexey Kardashevskiy <>
> [aw: for the vfio related changes]
> Acked-by: Alex Williamson <>
> Reviewed-by: David Gibson <>
> Reviewed-by: Gavin Shan <>
> ---
> Changes:
> v12:
> * added WARN_ON_ONCE() to decrement_locked_vm() for the sake of
> documentation

Reviewed-by: David Gibson <>

David Gibson | I'll have my music baroque, and my code
david AT | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
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