diff options
| author | Roland Dreier <rdreier@cisco.com> | 2009-03-30 11:31:05 -0400 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2009-03-30 11:31:05 -0400 |
| commit | e1d60ec6699f19b760df8261e922ae236ea7bb31 (patch) | |
| tree | 6a28185f550d78bf36cf5b7e7d411f204d0a2ad1 /drivers/infiniband | |
| parent | 5d80f8e5a9dc9c9a94d4aeaa567e219a808b8a4a (diff) | |
IB/mlx4: Use pgprot_writecombine() for BlueFlame pages
The PAT work on x86 has finally made pgprot_writecombine() a usable API
for modular drivers. As the comment indicates, this is exactly what we
want to use in mlx4_ib to map BlueFlame pages up to userspace, since
using WC for these pages improves small message latency significantly.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/mlx4/main.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c index 2ccb9d31771f..ae3d7590346e 100644 --- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c | |||
| @@ -394,8 +394,7 @@ static int mlx4_ib_mmap(struct ib_ucontext *context, struct vm_area_struct *vma) | |||
| 394 | PAGE_SIZE, vma->vm_page_prot)) | 394 | PAGE_SIZE, vma->vm_page_prot)) |
| 395 | return -EAGAIN; | 395 | return -EAGAIN; |
| 396 | } else if (vma->vm_pgoff == 1 && dev->dev->caps.bf_reg_size != 0) { | 396 | } else if (vma->vm_pgoff == 1 && dev->dev->caps.bf_reg_size != 0) { |
| 397 | /* FIXME want pgprot_writecombine() for BlueFlame pages */ | 397 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); |
| 398 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | ||
| 399 | 398 | ||
| 400 | if (io_remap_pfn_range(vma, vma->vm_start, | 399 | if (io_remap_pfn_range(vma, vma->vm_start, |
| 401 | to_mucontext(context)->uar.pfn + | 400 | to_mucontext(context)->uar.pfn + |