[PATCH] i386: fix double accounting in reserve_top_address()

[PATCH] i386: fix double accounting in reserve_top_address()

[Jan Beulich]

With VMALLOC_END included in the calculation of MAXMEM (as of 2.6.28)
it is no longer correct to also bump __VMALLOC_RESERVE in
reserve_top_address(). Doing so results in needlessly small lowmem.

Signed-off-by: Jan Beulich <jbeulich@novell.com>

---
 arch/x86/mm/pgtable.c |    1 -
 1 file changed, 1 deletion(-)

--- linux-2.6.31-rc4/arch/x86/mm/pgtable.c	2009-07-28 09:36:41.000000000 +0200
+++ 2.6.31-rc4-i386-reserve-top-address/arch/x86/mm/pgtable.c	2009-07-30 17:27:52.000000000 +0200
@@ -329,7 +329,6 @@ void __init reserve_top_address(unsigned
 	printk(KERN_INFO "Reserving virtual address space above 0x%08x\n",
 	       (int)-reserve);
 	__FIXADDR_TOP = -reserve - PAGE_SIZE;
-	__VMALLOC_RESERVE += reserve;
 #endif
 }
 

[tip:x86/urgent] x86, 32-bit: Fix double accounting in reserve_top_address()

[tip-bot for Jan Beulich]

Commit-ID:  6abf65510944d33b47575d151c6b318993c8d2b5
Gitweb:     http://git.kernel.org/tip/6abf65510944d33b47575d151c6b318993c8d2b5
Author:     Jan Beulich <JBeulich@novell.com>
AuthorDate: Thu, 30 Jul 2009 16:49:30 +0100
Committer:  Ingo Molnar <mingo@elte.hu>
CommitDate: Tue, 4 Aug 2009 16:27:29 +0200

x86, 32-bit: Fix double accounting in reserve_top_address()

With VMALLOC_END included in the calculation of MAXMEM (as of
2.6.28) it is no longer correct to also bump __VMALLOC_RESERVE
in reserve_top_address(). Doing so results in needlessly small
lowmem.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <4A71DD2A020000780000D482@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>


---
 arch/x86/mm/pgtable.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index af8f965..ed34f5e 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -329,7 +329,6 @@ void __init reserve_top_address(unsigned long reserve)
 	printk(KERN_INFO "Reserving virtual address space above 0x%08x\n",
 	       (int)-reserve);
 	__FIXADDR_TOP = -reserve - PAGE_SIZE;
-	__VMALLOC_RESERVE += reserve;
 #endif
 }