Re: Direct io failed with ion

2018-10-11 Thread Laura Abbott
On 10/11/2018 03:44 AM, Rock Lee wrote: On Thu, Oct 11, 2018 at 4:12 PM Dan Carpenter wrote: On Thu, Oct 11, 2018 at 11:24:49AM +0800, Rock Lee wrote: Hi I tested direct io with a ion allocated buffer, got a -EFAULT error. It turned out that ion_mmap() set VM_IO & VM_PFNMAP, but check_vm

Re: Direct io failed with ion

2018-10-11 Thread Rock Lee
On Thu, Oct 11, 2018 at 4:12 PM Dan Carpenter wrote: > > On Thu, Oct 11, 2018 at 11:24:49AM +0800, Rock Lee wrote: > > Hi > > I tested direct io with a ion allocated buffer, got a -EFAULT > > error. It turned out that ion_mmap() set VM_IO & VM_PFNMAP, but > > check_vma_flags() (do_direct_IO()

Re: Direct io failed with ion

2018-10-11 Thread Dan Carpenter
On Thu, Oct 11, 2018 at 11:24:49AM +0800, Rock Lee wrote: > Hi > I tested direct io with a ion allocated buffer, got a -EFAULT > error. It turned out that ion_mmap() set VM_IO & VM_PFNMAP, but > check_vma_flags() (do_direct_IO() calls it) doesn't allow that VMA has > these flags set. Could you

Direct io failed with ion

2018-10-10 Thread Rock Lee
Hi I tested direct io with a ion allocated buffer, got a -EFAULT error. It turned out that ion_mmap() set VM_IO & VM_PFNMAP, but check_vma_flags() (do_direct_IO() calls it) doesn't allow that VMA has these flags set. Could you give me any hit that could solve this issue? -- Cheers, Rock _