linux-kernel - [PATCH v4 16/36] mm: percpu: increase PERCPU_MODULE

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Message-ID: <20240221194052.927623-17-surenb@google.com>
Date: Wed, 21 Feb 2024 11:40:29 -0800
From: Suren Baghdasaryan <surenb@...gle.com>
To: akpm@...ux-foundation.org
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Subject: [PATCH v4 16/36] mm: percpu: increase PERCPU_MODULE_RESERVE to
 accommodate allocation tags

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@...gle.com>
Signed-off-by: Kent Overstreet <kent.overstreet@...ux.dev>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Tejun Heo <tj@...nel.org>
---
 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
-- 
2.44.0.rc0.258.g7320e95886-goog