Commit 58e38bdf6 for llama.cpp

commit 58e38bdf65f79d2d59f60c0cae206bb98cd332bd
Author: Oscar M. Herrera <oscar@kss-inc.com>
Date:   Tue Nov 10 07:55:46 2026 +0100

    llama : apply the iGPU lazy-mode fallback only when mmap is off (#31957)

    On a device without mmap support, --lazy-mode auto resolved to off even
    with --load-mode mmap, so llama_prefetch_rows never ran and the rows of
    the large tensors faulted in one page at a time. Resolve it to off only
    when mmap is off; the default iGPU load path is unchanged.

    Fixes #31943

diff --git a/src/llama-model.cpp b/src/llama-model.cpp
index 72639b155..dbc91a137 100644
--- a/src/llama-model.cpp
+++ b/src/llama-model.cpp
@@ -1697,8 +1697,8 @@ bool llama_model_base::load_tensors(llama_model_loader & ml) {
         }
     }

-    // resolve AUTO on systems without mmap support (e.g. iGPUs): fall back to OFF; see #28160
-    if (ml.lazy.mode == LLAMA_LAZY_MODE_AUTO) {
+    // resolve AUTO on systems without mmap support (e.g. iGPUs): fall back to OFF unless mmap is in use; see #28160, #31943
+    if (ml.lazy.mode == LLAMA_LAZY_MODE_AUTO && !ml.use_mmap) {
         for (const auto & dev : devices) {
             ggml_backend_dev_props props;
             ggml_backend_dev_get_props(dev.dev, &props);