On Sun, 22 Sep 2024 03:41:57 +0200
Dan Williams wrote:
> [ add s390 folks to comment on CONFIG_FS_DAX_LIMITED ]
[...]
> > @@ -2516,6 +2545,44 @@ static vm_fault_t __vm_insert_mixed(struct
> > vm_area_struct *vma,
> > return VM_FAULT_NOPAGE;
> > }
> >
> > +vm_fault_t dax_insert_pfn(struc
[ add s390 folks to comment on CONFIG_FS_DAX_LIMITED ]
Alistair Popple wrote:
> Currently to map a DAX page the DAX driver calls vmf_insert_pfn. This
> creates a special devmap PTE entry for the pfn but does not take a
> reference on the underlying struct page for the mapping. This is
> because DA
Currently to map a DAX page the DAX driver calls vmf_insert_pfn. This
creates a special devmap PTE entry for the pfn but does not take a
reference on the underlying struct page for the mapping. This is
because DAX page refcounts are treated specially, as indicated by the
presence of a devmap entry.
