From: Jack Steiner <steiner@sgi.com>
Date: Mon, 6 Mar 2006 23:42:50 +0000 (-0800)
Subject: [PATCH] Increase max kmalloc size for very large systems
X-Git-Tag: firefly_0821_release~37771
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a615fa83959896f8eac76c235953fb164cd1a9b9;p=firefly-linux-kernel-4.4.55.git

[PATCH] Increase max kmalloc size for very large systems

Systems with extemely large numbers of nodes or cpus need to kmalloc
structures larger than is currently supported.  This patch increases the
maximum supported size for very large systems.

This patch should have no effect on current systems.

(akpm: why not just use alloc_pages() for sysfs_cpus?)

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/include/linux/kmalloc_sizes.h b/include/linux/kmalloc_sizes.h
index d82d4c05c12d..bda23e00ed71 100644
--- a/include/linux/kmalloc_sizes.h
+++ b/include/linux/kmalloc_sizes.h
@@ -19,8 +19,10 @@
 	CACHE(32768)
 	CACHE(65536)
 	CACHE(131072)
-#ifndef CONFIG_MMU
+#if (NR_CPUS > 512) || (MAX_NUMNODES > 256) || !defined(CONFIG_MMU)
 	CACHE(262144)
+#endif
+#ifndef CONFIG_MMU
 	CACHE(524288)
 	CACHE(1048576)
 #ifdef CONFIG_LARGE_ALLOCS