On Sat, Feb 24, 2001 at 10:25:42AM -0700, Jeff Lessem wrote:
> In your message of: Sat, 24 Feb 2001 09:54:47 CST, you write:
> >Jeff, are you using the e820 memory map at all ? In particular, are you
> >using grub or some other buggy bootloader that insists on specifying a
> >mem= option on the kernel command line ? There should be a kernel command
> >line message very early on, what does that say ?
>
> Yes, I am using grub, the buggy bootloader. The relevant chunk of
> kernal messages are:
>
> BIOS-provided physical RAM map:
> BIOS-e820: 000000000009f800 @ 0000000000000000 (usable)
> BIOS-e820: 0000000000000800 @ 000000000009f800 (reserved)
> BIOS-e820: 0000000000019800 @ 00000000000e6800 (reserved)
> BIOS-e820: 0000000013ef0000 @ 0000000000100000 (usable)
> BIOS-e820: 000000000000fc00 @ 0000000013ff0000 (ACPI data)
> BIOS-e820: 0000000000000400 @ 0000000013fffc00 (ACPI NVS)
> BIOS-e820: 0000000000080000 @ 00000000fff80000 (reserved)
> On node 0 totalpages: 81904
> zone(0): 4096 pages.
> zone(1): 77808 pages.
> zone(2): 0 pages.
> Kernel command line: root=/dev/hda1 mem=327616K
>
> You are dead on, mem= seems a bit small. Forcing mem=320M on the
> command line fixes the problem completely.
Careful, you're overwriting ACPI data now (and using it as normal RAM).
Can you try one of a) LILO b) a fixed version of grub c) this patch ?
diff -ur linux/arch/i386/kernel/setup.c linux-prumpf/arch/i386/kernel/setup.c
--- linux/arch/i386/kernel/setup.c Fri Feb 23 13:37:38 2001
+++ linux-prumpf/arch/i386/kernel/setup.c Sat Feb 24 09:49:50 2001
@@ -555,30 +555,9 @@
e820.nr_map = 0;
usermem = 1;
} else {
- /* If the user specifies memory size, we
- * blow away any automatically generated
- * size
- */
- unsigned long start_at, mem_size;
-
- if (usermem == 0) {
- /* first time in: zap the whitelist
- * and reinitialize it with the
- * standard low-memory region.
- */
- e820.nr_map = 0;
- usermem = 1;
- add_memory_region(0, LOWMEMSIZE(), E820_RAM);
- }
- mem_size = memparse(from+4, &from);
+ memparse(from+4, &from);
if (*from == '@')
- start_at = memparse(from+1, &from);
- else {
- start_at = HIGH_MEMORY;
- mem_size -= HIGH_MEMORY;
- usermem=0;
- }
- add_memory_region(start_at, mem_size, E820_RAM);
+ memparse(from+1, &from);
}
}
c = *(from++);
-
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