@borzel Also, I somehow need to be able to reproduce the issue at lab. If you can give more details about how do you do backup, may be I can simulate something.
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RE: Alert: Control Domain Memory Usage
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RE: backblaze b2 / amazon s3 as remote in xoa
@shorian yes, VM size would make sense as a limit, I'll try to run with less memory.
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RE: Alert: Control Domain Memory Usage
@borzel I wish comparing kernel-alt and base kernel was easy to catch this... I'm sure that the tapdisk IO code is same in kernel and kernel-alt.
Also the 2 patches mentioned earlier are also present in base kernel of xcp-ng 8.2 as well as kernel-alt 4.19.142. They are also present for xcp-ng 8.1 base kernel, however they are not present in xcp-ng 8.1 kernel-alt.
Can you confirm your kernel-alt version?
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RE: Negative values for CPU usage (graph)
@badrAZ might help you on how to see the values and see more about those data.
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RE: Alert: Control Domain Memory Usage
@borzel
yum upgrade
from 7.x to 8.x is not supported, so it's likely that your host isn't in a perfectly clean state.This is unrelated to the memory leak, but could cause other kinds of issues. Basically, scripts that should have run during the RPM upgrade to ensure the final state is consistent with what you'd have from an ISO upgrade either don't exist or haven't been tested.
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RE: Alert: Control Domain Memory Usage
At least that's consistent
Thanks for the feedback @borzel