generic: test MADV_POPULATE_READ with IO errors

This is a regression test for "mm/madvise: make
MADV_POPULATE_(READ|WRITE) handle VM_FAULT_RETRY properly".

Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>
2 files changed