Re: [PATCH 5.15.y] iommu/dma: Trace bounce buffer usage when mapping buffers

[Greg KH]

On Mon, Jan 22, 2024 at 12:37:54PM -0800, Isaac J. Manjarres wrote:
> When commit 82612d66d51d ("iommu: Allow the dma-iommu api to
> use bounce buffers") was introduced, it did not add the logic
> for tracing the bounce buffer usage from iommu_dma_map_page().
> 
> All of the users of swiotlb_tbl_map_single() trace their bounce
> buffer usage, except iommu_dma_map_page(). This makes it difficult
> to track SWIOTLB usage from that function. Thus, trace bounce buffer
> usage from iommu_dma_map_page().
> 
> Fixes: 82612d66d51d ("iommu: Allow the dma-iommu api to use bounce buffers")
> Cc: stable@xxxxxxxxxxxxxxx # v5.15+
> Cc: Tom Murphy <murphyt7@xxxxxx>
> Cc: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> Cc: Saravana Kannan <saravanak@xxxxxxxxxx>
> Signed-off-by: Isaac J. Manjarres <isaacmanjarres@xxxxxxxxxx>
> Link: https://lore.kernel.org/r/20231208234141.2356157-1-isaacmanjarres@xxxxxxxxxx
> Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
> (cherry picked from commit a63c357b9fd56ad5fe64616f5b22835252c6a76a)
> Signed-off-by: Isaac J. Manjarres <isaacmanjarres@xxxxxxxxxx>

Now queued up, thanks.

greg k-h