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authorChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
commitd0c85e36e4de67af628d54e9ab577cc3fad7796a (patch)
treef8f784b0f04343b90516a338d6df81df3a85dfa2 /results/classifier/gemma3:12b/kvm/1798057
parent7f4364274750eb8cb39a3e7493132fca1c01232e (diff)
downloadqemu-analysis-d0c85e36e4de67af628d54e9ab577cc3fad7796a.tar.gz
qemu-analysis-d0c85e36e4de67af628d54e9ab577cc3fad7796a.zip
add deepseek and gemma results
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+
+Not able to start instances larger than 1 TB
+
+Specs:
+
+CPU: Intel(R) Xeon(R) Gold 6132 CPU @ 2.60GHz
+OS: Ubuntu 18.04 AMD64
+QEMU: 1:2.11+dfsg-1ubuntu7.6 (Ubuntu Bionic Package)
+Openstack: Openstack Queens (Ubuntu Bionic Package)
+Libvirt-daemon: 4.0.0-1ubuntu8.5
+Seabios: 1.10.2-1ubuntu1
+
+
+The Problem:
+We are not able to start instances, which have a memory size over 1 TB.
+After starting the instance, they shortly lock up. Starting guests with a lower amount of RAM works
+perfectly. We dealt with the same problem in the past with an older Qemu Version (2.5) by patching some source files according to this patch:
+
+https://git.centos.org/blob/rpms!!qemu-kvm.git/34b32196890e2c41b0aee042e600ba422f29db17/SOURCES!kvm-fix-guest-physical-bits-to-match-host-to-go-beyond-1.patch
+
+
+I think we now have somewhat the same problem here, however the source base changed and I'am not able to find the corresponding snippet to patch this.
+
+Also, guests show a wrong physical address size which is probably the cause of the lock ups on high memory guests:
+root@debug:~# grep physical /proc/cpuinfo 
+physical id	: 0
+address sizes	: 40 bits physical, 48 bits virtual 
+
+Any way to fix this?
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