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X-Proofpoint-ORIG-GUID: wckEyOegQ-pMzHazhcV8y5uOPVqOQnQb Expand our mremap() testing to further assert that behaviour is as expected. There is a poorly documented mremap() feature whereby it is possible to mremap() multiple VMAs (even with gaps) when shrinking, as long as the resultant shrunk range spans only a single VMA. So we start by asserting this behaviour functions correctly both with an in-place shrink and a shrink/move. Next, we further test the newly introduced ability to mremap() multiple VMAs when performing a MAP_FIXED move (that is without the size being changed), firstly by asserting that MREMAP_DONTUNMAP has no bearing on this behaviour. Finally, we explicitly test that such moves, when splitting source VMAs, function correctly. Lorenzo Stoakes (3): tools/testing/selftests: add mremap() shrink test for multiple VMAs tools/testing/selftests: test MREMAP_DONTUNMAP on multiple VMA move tools/testing/selftests: explicitly test split multi VMA mremap move tools/testing/selftests/mm/mremap_test.c | 235 ++++++++++++++++++++++- 1 file changed, 225 insertions(+), 10 deletions(-) -- 2.50.1