On Tue, 26 Jan 2016 22:28:29 +0200 "Kirill A. Shutemov" <kir...@shutemov.name> 
wrote:

> Let's mark the VMA as VM_IO to indicate to mm core that the VMA is
> migratable.
> 
> ...
>
> --- a/drivers/scsi/sg.c
> +++ b/drivers/scsi/sg.c
> @@ -1261,7 +1261,7 @@ sg_mmap(struct file *filp, struct vm_area_struct *vma)
>       }
>  
>       sfp->mmap_called = 1;
> -     vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
> +     vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
>       vma->vm_private_data = sfp;
>       vma->vm_ops = &sg_mmap_vm_ops;
>       return 0;

I'll put cc:stable on this - I don't think we recently did anything to make
this happen?
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