From e392d25828fa2bbd843d66fdbb055804d1f6e7e6 Mon Sep 17 00:00:00 2001
From: Bojan Serafimov <bojan.serafimov7@gmail.com>
Date: Wed, 11 Jan 2023 12:54:13 -0500
Subject: [PATCH] Improve image_layer_exists docstring

---
 pageserver/src/tenant/layer_map.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pageserver/src/tenant/layer_map.rs b/pageserver/src/tenant/layer_map.rs
index 9c796fdfdc..ec3189a18d 100644
--- a/pageserver/src/tenant/layer_map.rs
+++ b/pageserver/src/tenant/layer_map.rs
@@ -207,7 +207,9 @@ where
         NUM_ONDISK_LAYERS.dec();
     }
 
-    /// Is there a newer image layer for given key- and LSN-range?
+    /// Is there a newer image layer for given key- and LSN-range? Or a set
+    /// of image layers within the specified lsn range that cover the entire
+    /// specified key range?
     ///
     /// This is used for garbage collection, to determine if an old layer can
     /// be deleted.