On Thu, Jun 16, 2022 at 10:27:02AM +0800, Baolu Lu wrote:
> On 2022/6/15 23:40, Jason Gunthorpe wrote:
> > On Fri, Jun 10, 2022 at 01:37:20PM +0800, Baolu Lu wrote:
> > > On 2022/6/9 20:49, Jason Gunthorpe wrote:
> > > > > +void iommu_free_pgtbl_pages(struct iommu_domain *domain,
> > > > > +
On 2022/6/15 23:40, Jason Gunthorpe wrote:
On Fri, Jun 10, 2022 at 01:37:20PM +0800, Baolu Lu wrote:
On 2022/6/9 20:49, Jason Gunthorpe wrote:
+void iommu_free_pgtbl_pages(struct iommu_domain *domain,
+ struct list_head *pages)
+{
+ struct page *page, *next;
+
+
On Fri, Jun 10, 2022 at 01:37:20PM +0800, Baolu Lu wrote:
> On 2022/6/9 20:49, Jason Gunthorpe wrote:
> > > +void iommu_free_pgtbl_pages(struct iommu_domain *domain,
> > > + struct list_head *pages)
> > > +{
> > > + struct page *page, *next;
> > > +
> > > + if
On 2022/6/10 01:06, Raj, Ashok wrote:
On Thu, Jun 09, 2022 at 03:08:10PM +0800, Lu Baolu wrote:
The IOMMU page tables are updated using iommu_map/unmap() interfaces.
Currently, there is no mandatory requirement for drivers to use locks
to ensure concurrent updates to page tables, because it's
On 2022/6/9 21:32, Jason Gunthorpe wrote:
On Thu, Jun 09, 2022 at 02:19:06PM +0100, Robin Murphy wrote:
Is there a significant benefit to keeping both paths, or could we get away
with just always using RCU? Realistically, pagetable pages aren't likely to
be freed all that frequently, except
On 2022/6/9 20:49, Jason Gunthorpe wrote:
+void iommu_free_pgtbl_pages(struct iommu_domain *domain,
+ struct list_head *pages)
+{
+ struct page *page, *next;
+
+ if (!domain->concurrent_traversal) {
+ put_pages_list(pages);
+
On Thu, Jun 09, 2022 at 03:08:10PM +0800, Lu Baolu wrote:
> The IOMMU page tables are updated using iommu_map/unmap() interfaces.
> Currently, there is no mandatory requirement for drivers to use locks
> to ensure concurrent updates to page tables, because it's assumed that
> overlapping IOVA
On Thu, Jun 09, 2022 at 02:19:06PM +0100, Robin Murphy wrote:
> Is there a significant benefit to keeping both paths, or could we get away
> with just always using RCU? Realistically, pagetable pages aren't likely to
> be freed all that frequently, except perhaps at domain teardown, but that
>
On 2022-06-09 13:49, Jason Gunthorpe wrote:
On Thu, Jun 09, 2022 at 03:08:10PM +0800, Lu Baolu wrote:
The IOMMU page tables are updated using iommu_map/unmap() interfaces.
Currently, there is no mandatory requirement for drivers to use locks
to ensure concurrent updates to page tables, because
On Thu, Jun 09, 2022 at 03:08:10PM +0800, Lu Baolu wrote:
> The IOMMU page tables are updated using iommu_map/unmap() interfaces.
> Currently, there is no mandatory requirement for drivers to use locks
> to ensure concurrent updates to page tables, because it's assumed that
> overlapping IOVA
The IOMMU page tables are updated using iommu_map/unmap() interfaces.
Currently, there is no mandatory requirement for drivers to use locks
to ensure concurrent updates to page tables, because it's assumed that
overlapping IOVA ranges do not have concurrent updates. Therefore the
IOMMU drivers
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