linux-kernel - [PATCH] i386: fix double accounting in reserve_top

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Message-Id: <4A71DD2A020000780000D482@vpn.id2.novell.com>
Date:	Thu, 30 Jul 2009 16:49:30 +0100
From:	"Jan Beulich" <JBeulich@...ell.com>
To:	<mingo@...e.hu>, <tglx@...utronix.de>, <hpa@...or.com>
Cc:	<linux-kernel@...r.kernel.org>
Subject: [PATCH] i386: 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@...ell.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
 }
 



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