** Package changed: linux-signed (Ubuntu) => slurm-wlm (Ubuntu)
** Changed in: slurm-wlm (Ubuntu)
Status: Confirmed => Invalid
** Summary changed:
- cgroup2 broken since 5.15.0-90-generic?
+ load_ebpf_prog() fails for long bpf() logs
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So turns out this is not a kernel bug after all. As @hedrick mentioned
it is indeed related to the bpf logs. I suppose kernel 5.15 just
produces longer logs here than the newer kernels.
Here is the original bug report for Slurm
https://bugs.schedmd.com/show_bug.cgi?id=17210 that includes a patch.
@hedrick: Regarding that workaround you mentioned above, I would guess
it only suppresses the error message but doesn't fix the problem with
broken cgroup confinement. Is that correct?
I've done more testing and have identified the following commit:
Furthermore, slurm doesn't actually use the log data that the kernel
would pass back. So my code is better even with kernels that work. Why
pass a log buffer that you aren't going to use?
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However the same patch is in 6.5. I give up. At least I have a
workaround.
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https://bugs.launchpad.net/bugs/2050098
Title:
cgroup2 broken since 5.15.0-90-generic?
>From timing I suspect kernel.org
2dcb31e65d26a29a6842500e904907180e80a091, but I don't understand the
code so I can't tell whether there's actually a problem there.
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In src/plugins/cgroup/v2/ebpf.c, comment out logging. I.e. change
attr.log_level = 1;
attr.log_buf = (size_t) log;
attr.log_size = sizeof(log);
to
attr.log_level
I'm concerned with the security implications of being frozen on a kernel
we can't update. I suspect we should start testing an HWE kernel. That
raises other issues, since there are lots of other features we also need
to work, so it's going to require a fair amount of testing. I'd
accelerate our
We are also seeing this. We're now stuck on old kernels until this is
fixed.
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https://bugs.launchpad.net/bugs/2050098
Title:
cgroup2 broken since 5.15.0-90-generic?
** Summary changed:
- cgroup2 appears to be broken
+ cgroup2 broken since 5.15.0-90-generic?
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https://bugs.launchpad.net/bugs/2050098
Title:
cgroup2 broken since
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