Hello,
I have installed Xen 4.1 on a server Tyan based server machine with
Debain Wheezy (testing) :
Linux 2.6.39-2-amd64
xen-hypervisor-4.1-amd64
4.1.1-1
The server has 8 dual-core AMD opterons and 8 GB RAM. It is a Tyan
S4881 motherboard and mezzanine board - 4+4 CPU's.
On standard Linux, I see all 8 GB RAM.
On a plain install of Xen 4.1 (no configuration or guests), I see 5 GB
RAM. I assume something in the memory placement/map is causing this.
Is there anything I can do to see all 8 GB in Xen dom0? The BIOS has
some options for "node memory" interleaving, memory hole etc. but I am
not sure what to do.
I attach some log files and information showing the state.
1) dmesg - normal Linux
2) dmesg.xen - dmeg under Xen dom0
3) dmesg.xm - xm dmesg output in Xen dom0
And some memory information here. Any help or advice would be welcome.
Normal Linux :
# uname -a
Linux storserv1 2.6.39-2-amd64 #1 SMP Tue Jul 5 02:51:22 UTC 2011
x86_64 GNU/Linux
# free
total used free shared buffers cached
Mem: 8261616 317948 7943668 0 37108 165968
-/+ buffers/cache: 114872 8146744
Swap: 7811000 0 7811000
# cat /proc/meminfo
MemTotal: 8261616 kB
MemFree: 7943800 kB
Buffers: 37132 kB
Cached: 165964 kB
SwapCached: 0 kB
Active: 129904 kB
Inactive: 98524 kB
Active(anon): 25472 kB
Inactive(anon): 464 kB
Active(file): 104432 kB
Inactive(file): 98060 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 7811000 kB
SwapFree: 7811000 kB
Dirty: 44 kB
Writeback: 0 kB
AnonPages: 25404 kB
Mapped: 11376 kB
Shmem: 588 kB
Slab: 33972 kB
SReclaimable: 14104 kB
SUnreclaim: 19868 kB
KernelStack: 1624 kB
PageTables: 3288 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 11941808 kB
Committed_AS: 95920 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 62116 kB
VmallocChunk: 34359666172 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 51776 kB
DirectMap2M: 8400896 kB
# cat /proc/mtrr
reg00: base=0x000000000 ( 0MB), size= 2048MB, count=1: write-back
reg01: base=0x100000000 ( 4096MB), size= 4096MB, count=1: write-back
reg02: base=0x200000000 ( 8192MB), size= 1024MB, count=1: write-back
reg03: base=0x240000000 ( 9216MB), size= 512MB, count=1: write-back
reg04: base=0x080000000 ( 2048MB), size= 512MB, count=1: write-back
reg05: base=0x0c0000000 ( 3072MB), size= 256MB, count=1: write-combining
//////////////////////////////////////////////////////////////
Under Xen :
# uname -a
Linux storserv1 2.6.39-2-amd64 #1 SMP Tue Jul 5 02:51:22 UTC 2011
x86_64 GNU/Linux
# free
total used free shared buffers cached
Mem: 5029700 223128 4806572 0 8680 66008
-/+ buffers/cache: 148440 4881260
Swap: 7811000 0 7811000
# cat /proc/meminfo
MemTotal: 5029700 kB
MemFree: 4806456 kB
Buffers: 8680 kB
Cached: 65880 kB
SwapCached: 0 kB
Active: 69756 kB
Inactive: 52608 kB
Active(anon): 47824 kB
Inactive(anon): 548 kB
Active(file): 21932 kB
Inactive(file): 52060 kB
Unevictable: 52 kB
Mlocked: 52 kB
SwapTotal: 7811000 kB
SwapFree: 7811000 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 48028 kB
Mapped: 12148 kB
Shmem: 564 kB
Slab: 30432 kB
SReclaimable: 8464 kB
SUnreclaim: 21968 kB
KernelStack: 1752 kB
PageTables: 3484 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 10325848 kB
Committed_AS: 178724 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 76620 kB
VmallocChunk: 34359654268 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 9697328 kB
DirectMap2M: 0 kB
--
Alastair Sherringham
http://www.sherringham.net
dmesg
Description: Binary data
dmesg.XEN
Description: Binary data
xm.dmesg
Description: Binary data
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