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| author | Joerg Roedel <jroedel@suse.de> | 2015-12-21 16:28:45 +0100 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2015-12-28 17:18:51 +0100 |
| commit | ae62d49c7a9303de868f4925d020719d00686411 (patch) | |
| tree | 0358d8453787d21917185baaa42677fad8b6fee2 /drivers/iommu | |
| parent | iommu/amd: Add dma_ops_aperture_alloc() function (diff) | |
| download | linux-ae62d49c7a9303de868f4925d020719d00686411.tar.xz linux-ae62d49c7a9303de868f4925d020719d00686411.zip | |
iommu/amd: Move aperture_range.offset to another cache-line
Moving it before the pte_pages array puts in into the same
cache-line as the spin-lock and the bitmap array pointer.
This should safe a cache-miss.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index be0e81aff3bc..2a22515f5a8b 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -124,6 +124,7 @@ struct aperture_range { /* address allocation bitmap */ unsigned long *bitmap; + unsigned long offset; /* * Array of PTE pages for the aperture. In this array we save all the @@ -132,8 +133,6 @@ struct aperture_range { * just calculate its address in constant time. */ u64 *pte_pages[64]; - - unsigned long offset; }; /* |