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SubjectRe: [PATCH] intel-iommu: Fix leaks in pagetable freeing
On Sat, Jun 15, 2013 at 10:27:19AM -0600, Alex Williamson wrote:
> At best the current code only seems to free the leaf pagetables and
> the root. If you're unlucky enough to have a large gap (like any
> QEMU guest with more than 3G of memory), only the first chunk of leaf
> pagetables are freed (plus the root). This is a massive memory leak.
> This patch re-writes the pagetable freeing function to use a
> recursive algorithm and manages to not only free all the pagetables,
> but does it without any apparent performance loss versus the current
> broken version.
> Signed-off-by: Alex Williamson <>
> Cc:

Applied to iommu/fixes, thanks Alex. Will send this for v3.11 after a
couple of days in next.

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