Created attachment 500001[details]
/var/log/messages
Description of problem:
Tried to create 1000 guests on the machine with 64 cores CPU and 512GB memory . But after successful creation of 512 guests , was told error: internal error Process exited while reading console log output: kvm_create_vm: Cannot allocate memory Could not create KVM context .
When the error happened , checked with free
# # free -lm
total used free shared buffers cached
Mem: 516238 490302 25935 0 1215 440519
Low: 516238 490302 25935
High: 0 0 0
-/+ buffers/cache: 48568 467670
Swap: 34239 0 34239
it says there are still 25GB left . command "top" shows every qemu-kvm process use 0.0% memory
And also atm , selinux status was Permissive .
Version-Release number of selected component (if applicable):
kvm-83-230.el5
How reproducible:
Always
Steps to Reproduce:
1.try to start 1000 guests on 512GB memory machine
2.
3.
Actual results:
Expected results:
Additional info:
Created attachment 501038[details]
ps -axv and /proc/meminfo
(In reply to comment #3)
> Could you also check if "echo 1 >/proc/sys/vm/overcommit_memory" workaround
> that and then everything works fine?
with echo command executed , still meet kvm_create_vm: Cannot allocate memory
Could not create KVM context errors
Created attachment 500001 [details] /var/log/messages Description of problem: Tried to create 1000 guests on the machine with 64 cores CPU and 512GB memory . But after successful creation of 512 guests , was told error: internal error Process exited while reading console log output: kvm_create_vm: Cannot allocate memory Could not create KVM context . When the error happened , checked with free # # free -lm total used free shared buffers cached Mem: 516238 490302 25935 0 1215 440519 Low: 516238 490302 25935 High: 0 0 0 -/+ buffers/cache: 48568 467670 Swap: 34239 0 34239 it says there are still 25GB left . command "top" shows every qemu-kvm process use 0.0% memory And also atm , selinux status was Permissive . Version-Release number of selected component (if applicable): kvm-83-230.el5 How reproducible: Always Steps to Reproduce: 1.try to start 1000 guests on 512GB memory machine 2. 3. Actual results: Expected results: Additional info: