Fix zenith_test_evict mode and clear_buffer_cache() function

Using InvalidateBuffer is wrong, because if the page is concurrently dirtied, it will throw away the dirty page without calling smgwrite(). In Neon, that means that the last-written LSN update for the page is missed. In v16, use the new InvalidateVictimBuffer() function that does what we need. In v15 and v14, backport the InvalidateVictimBuffer() function. Fixes issue #7802
neondatabase · May 17, 2024 · 03b8e42 · 03b8e42
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diff --git a/vendor/postgres-v14 b/vendor/postgres-v14
diff --git a/vendor/postgres-v15 b/vendor/postgres-v15
diff --git a/vendor/postgres-v16 b/vendor/postgres-v16