2006-12-12 09:29:57

by Aneesh Kumar K.V

[permalink] [raw]
Subject: [PATCH] Alpha increase PERCPU_ENOUGH_ROOM


Module loading on Alpha was failing with error
"Could not allocate 8 bytes percpu data".

Looking at dmesg we have the below error
"No per-cpu room for modules."

Increase the PERCPU_ENOUGH_ROOM in a similar way as x86_64

Signed-off-by: Aneesh Kumar K.V <[email protected]>
---
include/asm-alpha/percpu.h | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/include/asm-alpha/percpu.h b/include/asm-alpha/percpu.h
index 48348fe..651ebb1 100644
--- a/include/asm-alpha/percpu.h
+++ b/include/asm-alpha/percpu.h
@@ -1,6 +1,20 @@
#ifndef __ALPHA_PERCPU_H
#define __ALPHA_PERCPU_H

+/*
+ * Increase the per cpu area for Alpha so that
+ * modules using percpu area can load.
+ */
+#ifdef CONFIG_MODULES
+# define PERCPU_MODULE_RESERVE 8192
+#else
+# define PERCPU_MODULE_RESERVE 0
+#endif
+
+#define PERCPU_ENOUGH_ROOM \
+ (ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES) + \
+ PERCPU_MODULE_RESERVE)
+
#include <asm-generic/percpu.h>

#endif /* __ALPHA_PERCPU_H */
--
1.4.4.2.gdb98-dirty


Attachments:
0002-Alpha-increase-PERCPU_ENOUGH_ROOM.txt (1.02 kB)