From: Roland Dreier <roland@topspin.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Andrew Walrond <andrew@walrond.org>,
"Martin J. Bligh" <mbligh@aracnet.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [PATCH] Re: Dmesg: Use a PAE enabled kernel
Date: 12 Mar 2003 13:05:02 -0800 [thread overview]
Message-ID: <523clswb29.fsf_-_@topspin.com> (raw)
In-Reply-To: <1046719362.7316.4.camel@irongate.swansea.linux.org.uk>
How about something like the following (untested) patch?
This is against 2.5 but will probably apply with offset to 2.4.
- Roland
--- 1.71/arch/i386/kernel/setup.c Thu Feb 27 16:10:55 2003
+++ edited/arch/i386/kernel/setup.c Wed Mar 12 12:54:42 2003
@@ -634,8 +634,11 @@
max_low_pfn = MAXMEM_PFN;
#ifndef CONFIG_HIGHMEM
/* Maximum memory usable is what is directly addressable */
- printk(KERN_WARNING "Warning only %ldMB will be used.\n",
- MAXMEM>>20);
+ printk(KERN_WARNING "WARNING: only %ldMB can be addressed.\n"
+ "%ldMB of RAM is inaccessible and will not be used.\n",
+ MAXMEM >> 20,
+ PAGE_SHIFT < 20 ? (max_pfn - MAXMEM_PFN) >> (20 - PAGE_SHIFT)
+ : (max_pfn - MAXMEM_PFN) << (PAGE_SHIFT - 20));
if (max_pfn > MAX_NONPAE_PFN)
printk(KERN_WARNING "Use a PAE enabled kernel.\n");
else
@@ -644,9 +647,12 @@
#else /* !CONFIG_HIGHMEM */
#ifndef CONFIG_X86_PAE
if (max_pfn > MAX_NONPAE_PFN) {
- max_pfn = MAX_NONPAE_PFN;
- printk(KERN_WARNING "Warning only 4GB will be used.\n");
+ printk(KERN_WARNING "WARNING: only 4GB can be addressed.\n"
+ "%ldMB of RAM is inaccessible and will not be used.\n",
+ PAGE_SHIFT < 20 ? (max_pfn - MAX_NONPAE_PFN) >> (20 - PAGE_SHIFT)
+ : (max_pfn - MAX_NONPAE_PFN) << (PAGE_SHIFT - 20));
printk(KERN_WARNING "Use a PAE enabled kernel.\n");
+ max_pfn = MAX_NONPAE_PFN;
}
#endif /* !CONFIG_X86_PAE */
#endif /* !CONFIG_HIGHMEM */
next prev parent reply other threads:[~2003-03-12 20:55 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-03 15:23 Dmesg: Use a PAE enabled kernel Andrew Walrond
2003-03-03 16:08 ` Martin J. Bligh
2003-03-03 16:24 ` Andrew Walrond
2003-03-03 16:33 ` Andrew Walrond
2003-03-03 17:42 ` Martin J. Bligh
2003-03-03 17:46 ` Alan Cox
2003-03-03 16:49 ` Andrew Walrond
2003-03-03 19:22 ` Alan Cox
2003-03-12 21:05 ` Roland Dreier [this message]
2003-03-04 3:22 ` H. Peter Anvin
2003-03-03 16:54 ` Alan Cox
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