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Steve Sistare authored
migrate_ignore_shared() is an optimization that avoids copying memory that is visible and can be mapped on the target. However, a memory-backend-ram or a memory-backend-memfd block with the RAM_SHARED flag set is not migrated when migrate_ignore_shared() is true. This is wrong, because the block has no named backing store, and its contents will be lost. To fix, ignore shared memory iff it is a named file. Define a new flag RAM_NAMED_FILE to distinguish this case. Signed-off-by:
Steve Sistare <steven.sistare@oracle.com> Reviewed-by:
Peter Xu <peterx@redhat.com> Message-Id: <1686151116-253260-1-git-send-email-steven.sistare@oracle.com> Signed-off-by:
Philippe Mathieu-Daudé <philmd@linaro.org>
Steve Sistare authoredmigrate_ignore_shared() is an optimization that avoids copying memory that is visible and can be mapped on the target. However, a memory-backend-ram or a memory-backend-memfd block with the RAM_SHARED flag set is not migrated when migrate_ignore_shared() is true. This is wrong, because the block has no named backing store, and its contents will be lost. To fix, ignore shared memory iff it is a named file. Define a new flag RAM_NAMED_FILE to distinguish this case. Signed-off-by:
Steve Sistare <steven.sistare@oracle.com> Reviewed-by:
Peter Xu <peterx@redhat.com> Message-Id: <1686151116-253260-1-git-send-email-steven.sistare@oracle.com> Signed-off-by:
Philippe Mathieu-Daudé <philmd@linaro.org>
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