Follow-up from "Do not overwrite prefixes set by users."
The following discussion from !5210 (merged) should be addressed:
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@BarrySmith started a discussion: When this is merged please convert this thread to an issue.
The MatSetFromOptions used by SuperLU_DIST, MUMPS etc for factorizations should be based on the setting the prefix for the get factor matrix instead of the original matrix. This will allow for the prefixes to be propagated down from the KSP and PC and not interfere with users prefixes on the matrix.