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    SubjectRe: [PATCH v5 03/14] mm/gup: return an error on migration failure
    On Mon, Jan 18, 2021 at 11:39:09PM -0500, Pavel Tatashin wrote:
    > When migration failure occurs, we still pin pages, which means
    > that we may pin CMA movable pages which should never be the case.
    >
    > Instead return an error without pinning pages when migration failure
    > happens.
    >
    > No need to retry migrating, because migrate_pages() already retries
    > 10 times.
    >
    > Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com>
    > mm/gup.c | 17 +++++++----------
    > 1 file changed, 7 insertions(+), 10 deletions(-)

    Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>

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