From 85652414737ce7c14d54554985fdb367d198a381 Mon Sep 17 00:00:00 2001
From: Zhenwei Jin <109658203+kylo5aby@users.noreply.github.com>
Date: Tue, 3 Sep 2024 01:53:23 +0800
Subject: [PATCH] src: make tail invalid when kv cell is intersection for mamba
 (#9249)

---
 src/llama.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/llama.cpp b/src/llama.cpp
index cde240bbe5935..7bbb9abb9cbfb 100644
--- a/src/llama.cpp
+++ b/src/llama.cpp
@@ -3810,7 +3810,8 @@ static bool llama_kv_cache_seq_rm(
                 if ((0 < p0 && p0 <= cell.pos) || (0 < p1 && p1 <= cell.pos)) {
                     return false;
                 }
-                if (p0 <= cell.pos && p1 < cell.pos) {
+                // invalidate tails which will be cleared
+                if (p0 <= cell.pos && cell.pos < p1) {
                     tail_id = -1;
                 }
             }