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| author | Robin Murphy <[email protected]> | 2017-01-16 13:24:55 +0000 |
|---|---|---|
| committer | Joerg Roedel <[email protected]> | 2017-01-30 15:14:24 +0000 |
| commit | 122fac030e912ed723fe94d8eb0d5d0f6b31535e (patch) | |
| tree | ddfdbf1d6725f348ece0fffe7dc839077c32cc5a /net/unix/af_unix.c | |
| parent | iommu/dma: Stop getting dma_32bit_pfn wrong (diff) | |
| download | kernel-122fac030e912ed723fe94d8eb0d5d0f6b31535e.tar.gz kernel-122fac030e912ed723fe94d8eb0d5d0f6b31535e.zip | |
iommu/dma: Implement PCI allocation optimisation
Whilst PCI devices may have 64-bit DMA masks, they still benefit from
using 32-bit addresses wherever possible in order to avoid DAC (PCI) or
longer address packets (PCIe), which may incur a performance overhead.
Implement the same optimisation as other allocators by trying to get a
32-bit address first, only falling back to the full mask if that fails.
Signed-off-by: Robin Murphy <[email protected]>
Signed-off-by: Joerg Roedel <[email protected]>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions