From: Timo Sirainen <tss@iki.fi>
Date: Sat, 2 Nov 2013 10:25:09 +0000 (+0200)
Subject: mdbox: When mail's refcount is too high, don't prevent shrinking the refcount.
X-Git-Tag: 2.2.7~26
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9ac3627c628013c2a20aaacb4c37e22c9eca989c;p=thirdparty%2Fdovecot%2Fcore.git

mdbox: When mail's refcount is too high, don't prevent shrinking the refcount.
---

diff --git a/src/lib-storage/index/dbox-multi/mdbox-map.c b/src/lib-storage/index/dbox-multi/mdbox-map.c
index 071e084db6..7e86eac6cb 100644
--- a/src/lib-storage/index/dbox-multi/mdbox-map.c
+++ b/src/lib-storage/index/dbox-multi/mdbox-map.c
@@ -649,7 +649,7 @@ int mdbox_map_update_refcount(struct mdbox_map_transaction_context *ctx,
 					map_uid);
 		return -1;
 	}
-	if (old_diff + new_diff >= 32768) {
+	if (old_diff + new_diff >= 32768 && new_diff > 0) {
 		/* we're getting close to the 64k limit. fail early
 		   to make it less likely that two processes increase
 		   the refcount enough times to cross the limit */