From 912e4cdb0df758c86908c4335ac6af094162bbb0 Mon Sep 17 00:00:00 2001
From: Henning Andersen <henning.andersen@elastic.co>
Date: Thu, 25 Jan 2024 09:53:29 +0100
Subject: [PATCH] Comment

---
 .../elasticsearch/blobcache/shared/SharedBlobCacheService.java   | 1 +
 1 file changed, 1 insertion(+)

diff --git a/x-pack/plugin/blob-cache/src/main/java/org/elasticsearch/blobcache/shared/SharedBlobCacheService.java b/x-pack/plugin/blob-cache/src/main/java/org/elasticsearch/blobcache/shared/SharedBlobCacheService.java
index 453aa792a5da..68a13125eba3 100644
--- a/x-pack/plugin/blob-cache/src/main/java/org/elasticsearch/blobcache/shared/SharedBlobCacheService.java
+++ b/x-pack/plugin/blob-cache/src/main/java/org/elasticsearch/blobcache/shared/SharedBlobCacheService.java
@@ -1415,6 +1415,7 @@ private SharedBytes.IO maybeEvictAndTake(Runnable evictedNotification) {
                             if (ioRef != null) {
                                 try {
                                     if (entry.chunk.refCount() == 1) {
+                                        // we own that one refcount (since we CAS'ed evicted to 1)
                                         // grab io, rely on incref'ers also checking evicted field.
                                         entry.chunk.io = null;
                                         assert regionOwners.remove(ioRef) == entry.chunk;