Commit e117148a4 for llama.cpp

commit e117148a41d8e9bedb72e4c6c3f003ab0fe7f857
Author: Aman Gupta <amangupta052@gmail.com>
Date:   Mon Oct 5 19:14:23 2026 +0530

    CUDA: make the alloc_deps check batch independent (#29986)

    Fixes #29980

diff --git a/ggml/src/ggml-cuda/ggml-cuda.cu b/ggml/src/ggml-cuda/ggml-cuda.cu
index c72419613..e068116f3 100644
--- a/ggml/src/ggml-cuda/ggml-cuda.cu
+++ b/ggml/src/ggml-cuda/ggml-cuda.cu
@@ -1846,11 +1846,14 @@ static bool ggml_cuda_match_shared_expert(const ggml_cgraph * graph, int routed_
         return (a == graph->nodes[idx] && b == graph->nodes[idx + 1]) ||
                (b == graph->nodes[idx] && a == graph->nodes[idx + 1]);
     };
+    // only batch-size independent checks here: graph_optimize must produce the same graph topology for every ubatch
+    // size, otherwise ggml-alloc has to re-reserve (and the scheduler to synchronize) at runtime.
+    // the MMVQ batch size check is done in ggml_cuda_try_fuse
     if (!is_pair(gate, up, routed_idx) || !is_pair(shared_gate, shared_up, shared_idx) ||
             !ggml_cuda_should_fuse_mul_mat(up, gate, routed) ||
             !ggml_cuda_should_fuse_mul_mat(shared_up, shared_gate, shared) ||
             !up->src[0]->buffer ||
-            !ggml_cuda_should_fuse_mul_mat_vec_q(up)) {
+            !ggml_is_quantized(up->src[0]->type)) {
         return false;
     }
     const ggml_tensor * input = up->src[1];
@@ -3510,7 +3513,8 @@ static int ggml_cuda_try_fuse(ggml_backend_cuda_context * cuda_ctx, ggml_cgraph
     ggml_tensor * node = cgraph->nodes[i];

     if (node->op == GGML_OP_MUL_MAT_ID && cuda_ctx->stream_context().concurrent_events.empty() &&
-            ggml_cuda_match_shared_expert(cgraph, i, i + 3)) {
+            ggml_cuda_match_shared_expert(cgraph, i, i + 3) &&
+            ggml_cuda_should_fuse_mul_mat_vec_q(cgraph->nodes[i + 2]->src[1])) {
         const int outputs[] = { i + 2, i + 5 };
         if (ggml_cuda_check_fusion_memory_ranges(cgraph, i, 6, outputs, 2)) {
             ggml_tensor * routed = cgraph->nodes[i + 2];