wido commented on PR #6399:
URL: https://github.com/apache/cloudstack/pull/6399#issuecomment-1131612789

   io_uring brings a massive performance improvement to end-users. It's RHEL 
and thus CentOS/Alma/Rocky which have this problem. Ubuntu does not have this 
issue.
   
   I do understand the problem here where CloudStack doesn't work out of the 
box, but if CloudStack becomes a project where you have a super long list of 
tunables/settings to get the optimal performance out of the system you will see 
users having endless tuning to do.
   
   In the future io_uring should really be enabled by default or at least we 
should enable it if supported by the Qemu version. Otherwise users won't get 
the performance they want/expect.
   
   Proxmox nowadays enables io_uring by default for all VMs being created. It's 
just such a massive performance boost.


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