Re: [PATCH v2 09/10] iommu: observability of the IOMMU allocations

Pasha Tatashin
2023-12-14T19:19:42Z

On Thu, Dec 14, 2023 at 12:59 PM David Rientjes <rientjes@google.com> wrote:
>
> On Thu, 30 Nov 2023, Pasha Tatashin wrote:
>
> > Add NR_IOMMU_PAGES into node_stat_item that counts number of pages
> > that are allocated by the IOMMU subsystem.
> >
> > The allocations can be view per-node via:
> > /sys/devices/system/node/nodeN/vmstat.
> >
> > For example:
> >
> > $ grep iommu /sys/devices/system/node/node*/vmstat
> > /sys/devices/system/node/node0/vmstat:nr_iommu_pages 106025
> > /sys/devices/system/node/node1/vmstat:nr_iommu_pages 3464
> >
> > The value is in page-count, therefore, in the above example
> > the iommu allocations amount to ~428M.
> >
> > Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
>
> Acked-by: David Rientjes <rientjes@google.com>

Thank you,
Pasha