Vishal Verma <[email protected]> writes: > From: Dan Williams <[email protected]> > > In preparation for consulting a badblocks list in pmem_direct_access(), > teach dax_pmd_fault() to fallback rather than fail immediately upon > encountering an error. The thought being that reducing the span of the > dax request may avoid the error region. > > Signed-off-by: Dan Williams <[email protected]>
Reviewed-by: Jeff Moyer <[email protected]> > --- > fs/dax.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/fs/dax.c b/fs/dax.c > index 90322eb..ec6417b 100644 > --- a/fs/dax.c > +++ b/fs/dax.c > @@ -945,8 +945,8 @@ int __dax_pmd_fault(struct vm_area_struct *vma, unsigned > long address, > long length = dax_map_atomic(bdev, &dax); > > if (length < 0) { > - result = VM_FAULT_SIGBUS; > - goto out; > + dax_pmd_dbg(&bh, address, "dax-error fallback"); > + goto fallback; > } > if (length < PMD_SIZE) { > dax_pmd_dbg(&bh, address, "dax-length too small");
