[PATCH v3 15/35] mm: percpu: increase PERCPU_MODULE_RESERVE to accommodate allocation tags

From: Suren Baghdasaryan
Date: Mon Feb 12 2024 - 16:46:06 EST


As each allocation tag generates a per-cpu variable, more space is required
to store them. Increase PERCPU_MODULE_RESERVE to provide enough area. A
better long-term solution would be to allocate this memory dynamically.

Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Signed-off-by: Kent Overstreet <kent.overstreet@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
---
include/linux/percpu.h | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 8c677f185901..62b5eb45bd89 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -14,7 +14,11 @@

/* enough to cover all DEFINE_PER_CPUs in modules */
#ifdef CONFIG_MODULES
+#ifdef CONFIG_MEM_ALLOC_PROFILING
+#define PERCPU_MODULE_RESERVE (8 << 12)
+#else
#define PERCPU_MODULE_RESERVE (8 << 10)
+#endif
#else
#define PERCPU_MODULE_RESERVE 0
#endif
--
2.43.0.687.g38aa6559b0-goog