Re: 2.6.16-rc5 huge memory detection regression

BTW, BIOS during the POST test shows all 16GB, it is only linux-2.6.16-rc5 who get's it wrong. Even the summary window provided by BIOS just before grub gets loaded shows 16GB of RAM.

I don't believe it is anything else then the kernel.

Andrew Morton wrote:

Martin MOKREJ__ <[email protected]> wrote:

I just tested 2.6.16-rc5 kernel on MSI 9136 dual Xeon server motherboard with 16 GB of memory and the kernel detects only 8 GB of RAM instead. 2.6.15 kernel detected properly 16 GB. I haven't tested any kernel revisions in between these two, but could if you point me in a specific direction. Attaching diff(1) output of dmesg(1) outputs.

Please Cc: me in replies. Thanks!
Martin


[boot-2.6.15_to_16-rc5.diff  text/plain (12156 bytes)]

The diff is useful.

--- tmp/boot-2.6.15.txt	2006-03-07 11:45:48.015509048 +0100
+++ tmp/boot-2.6.16-rc5.txt	2006-03-07 11:45:48.029506920 +0100
@@ -1,4 +1,4 @@
-Linux version 2.6.15 (root@phylo) (gcc version 3.4.5 (Gentoo 3.4.5-r1, ssp-3.4.5-1.0, pie-8.7.9)) #1 SMP Mon Mar 6 20:20:06 MET 2006
+Linux version 2.6.16-rc5 (root@phylo) (gcc version 3.4.5 (Gentoo 3.4.5-r1, ssp-3.4.5-1.0, pie-8.7.9)) #1 SMP Mon Mar 6 19:58:24 MET 2006
 BIOS-provided physical RAM map:
  BIOS-e820: 0000000000000000 - 000000000009a800 (usable)
  BIOS-e820: 000000000009a800 - 00000000000a0000 (reserved)
@@ -12,16 +12,16 @@
  BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
  BIOS-e820: 00000000ff800000 - 00000000ffc00000 (reserved)
  BIOS-e820: 00000000fffffc00 - 0000000100000000 (reserved)
- BIOS-e820: 0000000100000000 - 0000000430000000 (usable)
-16256MB HIGHMEM available.
+ BIOS-e820: 0000000100000000 - 0000000230000000 (usable)
+8064MB HIGHMEM available.

These numbers are what the BIOS is telling the kernel about your machine. Was the BIOS changed?

If not, you might need to wiggle those DIMMs or something.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• References:
  • 2.6.16-rc5 huge memory detection regression
    • From: Martin MOKREJŠ <[email protected]>
  • Re: 2.6.16-rc5 huge memory detection regression
    • From: Andrew Morton <[email protected]>

• Prev by Date: Re: 2.6.16-rc5 huge memory detection regression
• Next by Date: Re: PROBLEM: four bttv tuners in one PC crashed
• Previous by thread: Re: 2.6.16-rc5 huge memory detection regression
• Next by thread: [PATCH 1/6] NFS: Permit filesystem to override root dentry on mount [try #6]
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]