Re: AMD64-generic doesn't see all 4GB RAM?
Thanks Joost + JanIt was the Tyan BIOS memory mapping problem as you said.I had already turned the MTRR to discreet mapping, but it did notoccur to me to change the Software Memory Hole to software controlled, rather than disabled. Once I did that, the system happily reports the 4GBof memory.Thankyou for your help, it is much appreciated!-- John
Re: AMD64-generic doesn't see all 4GB RAM?
Actually, Joost or others, do you know what difference the memCLK BIOS setting has?With MTRR set to discreet, and Memhole Mapping set to software controlmy system boots fine, and I can see 4GB RAM. However, I then install xen then it won't boot. It fails activating the second core of the CPU. If I change memCLKfrom the default (200Mhz) to 100Mhz it boots fine, but then it only shows 3GB RAM.Is this memCLK specific to the Opteron or my RAM or what? Is there a guide to all these Hammer configurcation paramemters anywhere?John
AMD64-generic doesn't see all 4GB RAM?
I have a dual core Opteron 265 running in a Tyan K8WE (S2877) motherboard with4 x 1GB RAM DDR modules. The BIOS displays the RAM as 4094 MB, but usinga fresh install of testing/unstable from the AMD64 etch net-installer, I can still only see 3.2 GB out of the 4GB RAM...I am using the amd64-generic kernel that net-install gave me.Do I need to be using a different kernel to get the full 4GB RAM?# uname -a Linux debian 2.6.16-2-amd64-generic #1 Sun Jul 16 01:12:23 CEST 2006 x86_64 GNU/Linux# cat /proc/meminfo MemTotal: 3350660 kBMemFree: 3142864 kBBuffers: 7500 kBCached: 153792 kB SwapCached: 0 kBActive: 144088 kBInactive: 24644 kBHighTotal: 0 kBHighFree: 0 kBLowTotal: 3350660 kBLowFree: 3142864 kBSwapTotal: 23101376 kB SwapFree: 23101376 kBDirty: 228 kBWriteback: 0 kBMapped: 11700 kBSlab: 17896 kBCommitLimit: 24776704 kBCommitted_AS: 19272 kBPageTables: 960 kB VmallocTotal: 34359738367 kBVmallocUsed: 11528 kBVmallocChunk: 34359726839 kB# cat /proc/cpuinfoprocessor : 0vendor_id : AuthenticAMDcpu family : 15model : 33 model name : Dual Core AMD Opteron(tm) Processor 265stepping : 2cpu MHz : 1808.354cache size : 1024 KBfpu : yesfpu_exception : yescpuid level : 1wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacybogomips : 3620.65 TLB size : 1024 4K pagesclflush size : 64cache_alignment : 64address sizes : 40 bits physical, 48 bits virtualpower management: ts fid vid ttp-- John
