[Bug 667796] [NEW] kernel only recognizes 32G of memory

[Scott Moser]

Public bug reported:

The following is copied from
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/651370/comments/14
.  I'm fairly sure that The problem is also with a stock image (without
the additional command line options suggested in that bug).

Brandon's and Scott's workaround works for me partly, but the kernel on
an instance started in such a way seems to detect only 32 GB of memory
even for a m2.4xlarge instance which should have 68.4 GB available,
according to the EC2 instances page. Is this a side-effect of the
workaround, or a completely separate bug?

Maveric results:
ubuntu at ip-10-230-9-87:~$ uname -a
Linux ip-10-230-9-87 2.6.35-22-virtual #35-Ubuntu SMP Sat Oct 16 23:19:29 UTC 2010 x86_64 GNU/Linux
ubuntu at ip-10-230-9-87:~$ ec2metadata --instance-type
m2.4xlarge
ubuntu at ip-10-230-9-87:~$ free
             total used free shared buffers cached
Mem: 32810684 667628 32143056 0 6444 32152
-/+ buffers/cache: 629032 32181652
Swap: 0 0 0

Expected results (from a SUSE 11 guest):
ip-10-230-45-187:~ # uname -a
Linux ip-10-230-45-187 2.6.32.19-0.3-ec2 #1 SMP 2010-09-17 20:28:21 +0200 x86_64 x86_64 x86_64 GNU/Linux
ip-10-230-45-187:~ # curl http://169.254.169.254/latest/meta-data/instance-type
m2.4xlarge
ip-10-230-45-187:~ # free
             total used free shared buffers cached
Mem: 71705116 2361584 69343532 0 10972 126424
-/+ buffers/cache: 2224188 69480928
Swap: 0 0 0

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-22-virtual 2.6.35-22.33
Regression: Yes
Reproducible: Yes
ProcVersionSignature: User Name 2.6.35-22.33-virtual 2.6.35.4
Uname: Linux 2.6.35-22-virtual x86_64
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access /dev/snd/: No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
CurrentDmesg:
 
Date: Thu Oct 28 13:35:42 2010
Ec2AMI: ami-548c783d
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: us-east-1d
Ec2InstanceType: t1.micro
Ec2Kernel: aki-427d952b
Ec2Ramdisk: unavailable
Lspci:
 
Lsusb: Error: command ['lsusb'] failed with exit code 1:
ProcCmdLine: root=LABEL=uec-rootfs ro console=hvc0
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcModules: acpiphp 18752 0 - Live 0xffffffffa0000000
SourcePackage: linux

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug ec2-images kernel-uncat maverick needs-upstream-testing regression-potential

-- 
kernel only recognizes 32G of memory
https://bugs.launchpad.net/bugs/667796
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